|
Detailed Area Plant List for City of Golden Open Space, Jefferson County, United States.
Edited by Tom Schweich
This list is assembled from personal collections, herbarium vouchers, and published lists. For California, much of the data is provided by the participants of the Consortium of California Herbaria as indicated by a single dagger “†.” Their web site is at: (http://ucjeps.berkeley.edu/consortium/). For Colorado, much of the data is provided by the Southwest Environmental Information Network as indicated by a double dagger “‡,” which web site is found at (http://swbiodiversity.org). See their respective websites for copyright information and recommended citation formats.
For a complete list of Locations included in this Area List, see the Locations Included section, below.
For a check list, please see: Check List for City of Golden Open Space, Jefferson County, United States.
Bryophyta
Bryophyte . CalPhotos. Jepson eFlora. SEINet Taxon.
- Schweich Hill,
Deferred.
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue. 2.3 km. northwest of GNIS location of Golden. Upper slope of cut bank, north side of open space.
Tom Schweich 2014.
16 Apr 2019.
(
KHD ‡
)
.
 Coll. No. 2014, Bryophyte |
Equisetaceae
Equisetum arvense L. Field Horsetail. CalPhotos. Jepson eFlora. SEINet Taxon.
- Grant Terry Open Space,
iNaturalist Observation 220302821.
jack_i 5957.
6/3/2024.
.
 Coll. No. 870.1, Equisetum arvense |
Cupressaceae
Juniperus . Horticultural Juniper. CalPhotos. Jepson eFlora. SEINet Taxon.
- Kinney Run South, 4486. 4/9/2026. .
- Welch Ditch (Open Space), 4718. 4/25/2026. . .
Juniperus communis L. var. depressa Pursh. Common Juniper. CalPhotos. Jepson eFlora. SEINet Taxon.
- Eagle Ridge, at the north base of Eagle Ridge Tom Schweich 2002. 8/28/2020. .
- Stonebridge Homeowners Association,
Tom Schweich 3242.
6/13/2023.
.
.
 Glaucous stomatal band on leaf of Coll. No. 1361, Juniperus communis var. depressa |
 Coll. No. 1361, Juniperus communis var. depressa |
Juniperus scopulorum Sarg. (Syn: Sabina scopulorum Sarg.(Sarg.) Rydb. ) Rocky Mountain Juniper. CalPhotos. Jepson eFlora. SEINet Taxon.
- Grampsas North Open Space (City of Golden), Sole shrub on north slope, with Artemisia dracunculus, Mirabilis linearis, Eriogonum alatum, and Elymus elymoides. This area was designated a City of Golden open space in 2025. Northern portion of the Tony Grampsas Memorial Sports Complex, northeast slope of small alluvial hill, southeast side of North Table Mountain, 4.02 km. (geodesic) northeast of the GNIS location of Golden. Tom Schweich 3473. 25 Jul 2025. ( KHD ) .
- Kinney Run South, 4484. 4/9/2026. .
- Magic Mountain Archeological Site, Tom Schweich 1656. 4/18/2018. .
- North Hogback Open Space (City of Golden), Tom Schweich 1735. 6/14/2019. .
- Stonebridge Homeowners Association,
Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2298.
7/24/2020.
Sovell, John R., and Susan S. Panjabi, 2021
.
.
Juniperus virginiana L. var. virginiana. Eastern Redcedar. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Open Space (City of Golden), 4145. 6/1/2025. 4241. 7/16/2025. 4243. 7/16/2025. 4246. 7/16/2025. .
- Kinney Run, Tom Schweich 1627. 7/6/2018. .
- Schweich Hill, Probable garden escapee. On a cut bank near the north boundary fence of the Upper Washington Avenue Open Space, 1.8 km northwest of the GNIS location of Golden. Tom Schweich 1775. 11 Apr 2018. ( CS198647‡ KHD00069179‡ ) .
Pinaceae
Picea pungens Engelm. Colorado Blue Spruce. CalPhotos. Jepson eFlora. SEINet Taxon.
- Welch Ditch (Open Space),
4726.
4/25/2026.
.
.
 Obs. No. 3812, Picea pungens. |
 Spruce tree at 900 5th Street. |
 Spruce tree at 900 5th Street. |
Pinus edulis Engelm. Pinyon Pine. CalPhotos. Jepson eFlora. SEINet Taxon.
- Cressmans Gulch, horticultural 4571. 4/15/2026. .
- Kinney Run South, 4485. 4/9/2026. .
- South Illinois Open Space,
3937.
12/20/2024.
.
.
 Coll. No. 3547, Pinus edulis. |
 Coll. No. 3547, Pinus edulis. |
 Location of Pinus edulis on Mt. Zion. |
Pinus scopulorum Lemmon. (Syn: P. ponderosa Laws. var. scopulorum Engelm. ) Rocky Mountain yellow pine. CalPhotos. Jepson eFlora. SEINet Taxon.
- Cressmans Gulch, 4541. 4/15/2026. .
- Grant Terry Open Space, iNaturalist Observation 261038690. davita3 5955. 2/8/2025. .
- Heritage Dells, South Gulch, 6151. 6/1/2026. .
- Magic Mountain Archeological Site, Tom Schweich 1655. 4/18/2018. .
- North Hogback Open Space (City of Golden), Tom Schweich 1734. 6/14/2019. .
- North Table Mountain Open Space (City of Golden), 4217. 6/27/2025. .
- Welch Ditch,
One tree growing against the lower side of flume
4431.
3/25/2026.
.
.
 East slope of Tarryall Mountains from Camp Site 8. |
 Coll. No. 1316, Pinus |
 Rocky Mountain yellow pine on top of North Table Mountain. |
Pseudotsuga menziesii (Mirb.) Franco var. glauca (Beissn.) Franco. (Syn: Pseudotsuga menziesii (Mirb.) Franco var. glauca (Mayr) Franco ) Douglas-fir. CalPhotos. Jepson eFlora. SEINet Taxon.
- Welch Ditch (Open Space),
4725.
4/25/2026.
.
Amaranthaceae
Amaranthus blitoides S. Watson. (Syn: A. graecizans L. ) Mat Amaranth. CalPhotos. Jepson eFlora. SEINet Taxon.
- Magic Mountain Archeological Site, Open disturbed ground. Ca 2 1/2 mi S of Golden Ernest H. Brunquist 64. 23 Sep 1959. ( CS37485‡ ) . .
Amaranthus powellii S. Watson. Powell's Pigweed. CalPhotos. Jepson eFlora. SEINet Taxon.
- Magic Mountain Archeological Site,
Open disturbed dry part of creekbed
Ca 2 1/2 mi S of Golden. T R70W S10.
Ernest H. Brunquist 63.
23 Sep 1959.
(
CS37484‡
)
.
.
 Coll. No. 3489, Amaranthus powellii. |
Froelichia gracilis (Hook.) Moq. Slender Snakecotton. CalPhotos. Jepson eFlora. SEINet Taxon.
- Magic Mountain Archeological Site, Ca 2 1/2 mi S of Golden Ernest H. Brunquist 25. 17 Aug 1959. ( CS23911‡ KHD727‡ ) .
- Welch Ditch,
Upper side of flume only, not seen below. Only plant growing here.
Mouth of Clear Creek Canyon, in loose gravel and rocks between cliff and the flume of Welch Ditch, 2.60 km. (geodesic) west southwest of the GNIS location of Golden.
Tom Schweich 3206.
30 Aug 2023.
(
CS202199‡
JCOS s.n.
KHD ‡
OBI
)
.
 Coll No. 3206, Froelichia gracilis. |
 Coll No. 3206, Froelichia gracilis. |
 Coll No. 3206, Froelichia gracilis. |
 Coll. No. 3206, Froelichia gracilis. |
Anacardiaceae
Rhus glabra L. Smooth Sumac. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space, 6000. 5/11/2026. .
- Grant Terry Open Space, iNaturalist Observation 306843706. maryadams 5916. 8/16/2025. .
- Stonebridge Homeowners Association, Tom Schweich 3243. 6/13/2023. .
- Tucker Gulch (lower),
Tom Schweich 2908.
7/6/2022.
.
.
 Last year's fruit on Rhus glabra |
 Coll. No. 2556, Rhus glabra. |
Rhus trilobata Nutt. var. trilobata. (Syn: Rhus aromatica Aiton var. trilobata (Nutt.) A. Gray ex S. Watson ) Skunkbush Sumac. CalPhotos. Jepson eFlora. SEINet Taxon.
- Cressmans Gulch, 4581. 4/15/2026. .
- Deadman Gulch, Variety trilobata if infraspecific names are to be applied. Slightly above the watercourse locally named “Kinney Run,” between US Highway 6 and Eagle Ridge Drive, 3.2 km. south of the GNIS location of Golden Tom Schweich 2041. 2 Jun 2019. ( KHD71100‡ OBI183249‡ REGIS s.n. Error 14.6(b)-7c ) .
- Eagle Ridge, Tom Schweich 3176. 5/28/2023. .
- Kinney Run South, 3974. 1/3/2025. .
- Parfet Open Space (City of Golden), 4113. 6/1/2025. .
- Grant Terry Open Space, iNaturalist Observation 345821395. suzanne11 5917. 3/28/2026. .
- Heritage Dells, North Gulch, 4645. 4/23/2026. .
- Heritage Dells, South Gulch, 4502. 4/9/2026. 4509. 4/9/2026. .
- Kinney Run, Tom Schweich 1639. 7/6/2018. .
- Magic Mountain Archeological Site, Tom Schweich 1653. 4/18/2018. .
- North Hogback Open Space (City of Golden), Tom Schweich 1722. 6/14/2019. Mixed foothills grassland and shrubland, shrub density increasing above, also collected here: Celtis reticulata, Gutierrezia sarothrae, Tragia ramosa, Eriogonum alatum, and Grindelia squarrosa. Variety trilobata if infraspecific names are to be applied. Northwesternmost city limits of Golden, west side of Dakota Ridge (North Hogback), about 2/3 of the way up the west slope from Cressmans Gulch, 2.66 km. north northwest of the GNIS location of Golden. Tom Schweich 2401. 29 Jul 2020. ( COLO2433886‡ UC ) .
- Schweich Hill, One shrub, southwest side. Tom Schweich 1580. 8/31/2017. .
- South Table Mountain Open Space (City of Golden), 6016. 5/13/2026. .
- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2192. 6/12/2021. .
- Tripp Ranch Meadow Open Space, 2738. 6/10/2022. .
- Welch Ditch (Open Space),
4705.
4/25/2026.
.
.
Toxicodendron rydbergii (Small ex Rydb.) Greene. Western Poison Ivy. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Open Space (City of Golden), 4130. 6/1/2025. 4250. 7/16/2025. .
- Grant Terry Open Space, iNaturalist Observation 224101638. janaborrink 5918. 6/17/2024. .
- Heritage Dells, South Gulch, 6149. 6/1/2026. .
- Magic Mountain Archeological Site, 4354. 7/30/2025. .
- North Hogback Open Space (City of Golden),
Tom Schweich 1740.
6/14/2019.
growing in rock outcrop along the spine of the ridge.
Tom Schweich 2012.
9/17/2020.
.
 Western Poison Ivy on the backbone of Dakota Ridge. |
Apiaceae
Aletes acaulis (Torr.) J.M. Coult. & Rose. Stemless Indian Parsley. CalPhotos. Jepson eFlora. SEINet Taxon.
- South Table Mountain Open Space (City of Golden), 6059. 5/13/2026. Slope: ledge, Aspect: South Rock ledge. A lava capped mesa in the Denver Formation South Table Mountain, mesa under Castle Rock. 13N 0482100E 4400400N. Loraine Yeatts 864. 30 Apr 1984. ( KHD21794‡ ) .
- Welch Ditch,
Also collected here: Sedum lanceolatum, Comandra umbellata subsp. pallida, Eriogonum umbellatum var. umbellatum, and Physocarpus monogynus.
Popular rock-climbing area with heavy daily use.
Along the former Welch Ditch, south side of Clear Creek, growing in rocks on slope above the ditch, just inside the mouth of Clear Creek Canyon, 2.58 km. west southwest of the GNIS location of Golden.
Tom Schweich 2312.4
3 Jun 2020.
(
COLO2434470‡
CS198717‡
UC
)
.
.
 Apiaceae Aletes acaulis |
 Coll. No. 1925, Aletes acaulis |
 Coll. No. 1321, Aletes acaulis |
Conium maculatum L. Common Poison Hemlock. Weed: CO DofA, List: C. CalPhotos. Jepson eFlora. SEINet Taxon.
- Cottonwood Natural Area, 3951. 12/27/2024. .
- Heritage Dells, North Gulch, 4631. 4/23/2026. .
- North Table Mountain Open Space (City of Golden), 4204. 6/23/2025. .
- Parfet Prehistoric Preserve, 4022. 4/30/2025. .
- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2193. 6/12/2021. .
- Tripp Ranch Meadow Open Space, Tom Schweich 3562. 6/8/2024. .
- Welch Ditch (Open Space),
4714.
4/25/2026.
.
.
 Coll. No. 1436, Conium maculatum |
Harbouria trachypleura (A. Gray) J.M. Coult. & Rose. (Syn: Thaspium trachypleurum A. Gray ) Whiskbroom Parsley. CalPhotos. Jepson eFlora. SEINet Taxon.
- Kinney Run,
Tom Schweich 1847.
5/15/2020.
.
.
 Coll. No. 1357, Harbouria trachypleura |
 Coll. No. 1904, Harbouria trachypleura |
 Inflorescence of Coll. No. 1904, Harbouria trachypleura |
Ligusticum porteri J.M. Coult. & Rose. Porter's Licorice-Root. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial, 1 m., sunny mountain valley slope; Leaves, tripinnately compound; Leaflets, well-defined, ultimate leaf division, 2-3 mm.; Inflorescence, compound umbel; Involucral bractlets, green, few; Flowers, white; Ovary, glabrous; Stylopodium, conic, frilled; Fruit, glabrous; (Described from Coll. No. 3248, 10 June 2024, and Coll. No. 3269, 21 June 2024.)
- North Table Mountain Open Space (City of Golden),
4214.
6/27/2025.
Seen or collected narby: Ericameria nauseosa var. graveolens, Campanula rotundifolia, Prunus americana, P. virginiana, Acer glabrum, and Bromus inermis.
Along a social trail in the northern part of the North Table Mountain Open Space, beside one of the larger watercourses coming down from the top of the mesa, 2.4 km. north of the GNIS location of Golden.
Tom Schweich 3428.
23 Jun 2025.
(
CS
KHD
)
.
.
Lomatium orientale J.M. Coult. & Rose. Salt-and-Pepper. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial, to 20 cm., woody taproot; Leaves, compound, pinnate, 75 mm. × 26 mm. wide, ultimate divisions, ≤3 mm., ≤1 mm. wide, villous, tips, obtuse, (with a very small white “spine”); Inflorescence, compound umbel; Involucel Bracts, glabrous; Flowers, white; Anthers, red; Ovary, glabrous, stylopodium, absent; Fruit, 5 mm. × 3.5 mm. wide, ovate, glabrous, dorsally compressed, lateral ribs winged (Described from Coll. No. 1837, 17 May 2018).
- Deadman Gulch, Slightly above the watercourse locally named “Kinney Run,” between US Highway 6 and Eagle Ridge Drive, 50 m. northwest of Kinney Run Trail, 3.17 km. south of the GNIS location of Golden. Tom Schweich 2042.1 2 Jun 2019. ( KHD 71098‡ ) .
- Parfet Open Space (City of Golden), 4105. 6/1/2025. .
- Heritage Dells, North Gulch, 4644. 4/23/2026. .
- Heritage Dells, South Gulch, 4492. 4/9/2026. 4505. 4/9/2026. .
- Kinney Run, 4441. 3/30/2026. .
- Magic Mountain Archeological Site, Tom Schweich 1650. 4/18/2018. .
- North Hogback Open Space (City of Golden), Tom Schweich 1745. 6/14/2019. Mixed-grass prairie just below foothills mountain mahogany shrubland; collected here: Cerastium arvense, Scutellaria brittonii, Amelanchier alnifolia, nearby: Cercocarpus montanus. Southern end of the hogback in northernmost Golden, 4.16 km. north northwest of the GNIS location of Golden. Tom Schweich 2265.1 9 May 2020. ( CAS CDA0053728‡ ) .
- North Table Mountain Open Space (City of Golden), 4433. 3/26/2026. .
- Parfet Prehistoric Preserve, 4026. 4/30/2025. .
- Schweich Hill, Tom Schweich 1545. 5/2/2017. with Artemisia ludoviciana, in an area of encroaching smooth brome. Near northern boundary, near the bottom of the original hill slope, 2.30 km. northwest of the GNIS location of Golden Tom Schweich 2920. 21 May 2023. ( COLO ) .
- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2194. 6/12/2021. .
- Tripp Ranch Meadow Open Space,
Tom Schweich 3563.
6/8/2024.
.
.
Musineon divaricatum (Pursh) Raf. Leafy Wildparsley. CalPhotos. Jepson eFlora. SEINet Taxon.
- Eagle Ridge, Also here: Lomatium orientale, Helianthus pumilis, Mertensia lanceolata, Astragalus drummondii, Scutellaria brittonii, and Cercocarpus montanus. West-southwest-facing slope of Eagle Ridge, a locally named ridge of upturned Dakota Group between US Highway 6 and Eagleridge Drive, between Stonebridge entrance and Kinney Run, 3.75 km. south southeast of the GNIS location of Golden. Tom Schweich 2918. 9 May 2023. ( CDA56585‡ CS202024‡ OBI ) .
- Parfet Open Space (City of Golden),
4118.
6/1/2025.
.
Apocynaceae
Apocynum ×floribundum Greene. Dogbane. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 35 cm.; Leaves, cauline, opposite, spreading horizontal, petiole 2 mm. + blade 50 mm. × 24 mm. wide, ovate, margin revolute; Sepals, 2.5 mm.; Flowers, bell-shaped, 6 mm. × 5 mm. wide, >2× calyx; Petals, fused at base, tube mm. + lobes 2 mm., pink, drying purple, lobes erect to spreading, none reflexed; Stamens, 5. Filaments, distinct; More like A. androsaemifolium than A. cannabinum, but it seems to best fit the description of the hybrid A. ×floribundum. (Described from Coll. No. 1442, 22 June 2016.)
- Deadman Gulch,
Highly disturbed habitat between trails.
Between the 6th Avenue Trail and the creek of Deadman Gulch, 2.24 km. (geodesic) south of GNIS location of Golden
Tom Schweich 2990.
19 Jun 2023.
(
Golden
)
.
.
 Coll. No. 1442, Apocynum x-floribundum |
 Coll. No. 1678, Apocynum x-floribundum |
 Coll. No. 2180, Apocynum x-floribundum |
 Inflorescence of Coll. No. 2180, Apocynum x-floribundum |
Vinca minor L. Lesser Periwinkle. CalPhotos. Jepson eFlora. SEINet Taxon.
- Cressmans Gulch, 4546. 4/15/2026. .
- Welch Ditch (Open Space), 4728. 4/25/2026. .
Asclepiadaceae
Asclepias pumila (A. Gray) Vail. Plains Milkweed. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Table Mountain Open Space (City of Golden), iNaturalist Observation 228192164. sdymersk 3896. 7/8/2024. .
- South Table Mountain Open Space (City of Golden),
6066.
5/13/2026.
upper bank of the Olivine Trail from here about 15 meters down trail (south); not seen on undisturbed slope above and below trail.
Tom Schweich 3333.
7/7/2023.
.
.
 Asclepias pumila growing in my parkway. |
 Asclepias pumila growing in my parkway. |
Asclepias speciosa Torr. Showy Milkweed. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space, 5968. 5/11/2026. 5995. 5/11/2026. .
- Cottonwood Natural Area, 3945. 12/27/2024. .
- Parfet Open Space (City of Golden), 4251. 7/16/2025. .
- Heritage Dells, South Gulch, 6136. 6/1/2026. .
- Schweich Hill, Determination tentative. Tom Schweich 1535. 3/27/2017. .
- Tucker Gulch (lower),
Tom Schweich 2903.
7/6/2022.
.
.
 Seed pod of Asclepias speciosa |
 Seed of Asclepias speciosa |
Asclepias viridiflora Raf. Green Comet Milkweed. CalPhotos. Jepson eFlora. SEINet Taxon.
- Grampsas North Open Space (City of Golden), 4288. 7/25/2025. 4289. 7/25/2025. .
- Parfet Open Space (City of Golden), 11 plants 4263. 7/16/2025. .
- North Table Mountain Open Space (City of Golden),
Lower southwest slopes, adjacent to trail.
Tom Schweich, with Cindy Trujillo 2157.
6/18/2021.
.
Asteraceae
Achillea millefolium L. (Syn: A. lanulosa Nutt. , A. m. L. var. alpicola (Rydb.) Garrett , A. m. L. var. lanulosa (Nutt.) Piper , A. m. L. var. occidentalis DC. ) Common Yarrow. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb to 50 cm.;; Leaves alternate, tendrils absent, finely dissected, aromatic when fresh; Inflorescence, heads enclosed by an involucre, in flat-topped clusters; Phyllaries in 2+ series; Receptacles bearing scale-like bracts (paleate); Perianth in 2 or more whorls, parts in 5s; Phyllaries in 2+ series, not all subtending ray flowers; Flowers open, bisexual, two kinds, some with strap-shaped corollas; Petals fused into a tube; Ray flowers, white, lobe ovate; Disc flowers, white; Stamens = in number to corolla lobes; Ovary inferior. Pistils, 1 per flower (Described from Coll. No. 482, 30 Nov 2011, and Coll. No. 1023, 24 Jul 2013).
- North Table Mountain Open Space (City of Golden), Low shrubs, forbs, and grasses, with Ligusticum porteri, Artemisia ludoviciana, Carduus nutans, Gutierrezia sarothrae, Turritis glabra, and Toxicoscordion paniculatum. Designated a City of Golden Open Space in 2025. Southwest slope of North Table Mountain, northern part of the open space, along a social trail, in an area of hummocky ground suggesting an ancient landslide, 2.39 km. north of the GNIS location of Golden. Tom Schweich 3427. 23 Jun 2025. ( UCR ) .
- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2195. 6/12/2021. .
- Tripp Ranch Meadow Open Space,
2746.
6/10/2022.
.
.
Agoseris parviflora (Nutt.) D. Dietr. (Syn: A. glauca (Pursh) Raf. var. laciniata (D. C. Eaton) Smiley , Troximon parviflorum Nutt. , Troximon pubescens (Rydb.) A. Nels. ) Steppe Goat-Chicory. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 20 cm.; Leaves, basal, to 180 mm. × 6 mm. wide, not prickly, margins, generally straight (not wavy), 0- to 6-toothed, sparsely ciliate or hairy; Inflorescence, single heads on scape to 15 cm.; Phyllaries, in 2+ graduated series, 10-13-16 mm., generally green, mid-vein dark purple, margin scarious, outer phyllaries, mid-vein and margin ciliate; Ray flowers, corolla, 20-22 mm., yellow (drying more purple than pink), lobes 5; Disc flowers 0; Pappus, simple capillary bristles; Achene, surface smooth, beak unknown (immature). (Described from Coll. No. 1101, 3 May 2015)
- Eagle Ridge, Nearly flat soil along top of hogback, with Helianthus pumilis, Cercocarpus montanus, Penstemon virens, Alyssum simplex, Erodium cicutarium, and Bromus tectorum. Local name for a small hogback composed of vertically-upturned Cretaceous-age Dakota Group between Deadman Gulch and US Highway 6, about 3.5 km. south of the GNIS location of Golden. Tom Schweich 2926. 28 May 2023. ( CAS716686‡ CS202026‡ ) .
- Parfet Prehistoric Preserve,
In a low area that may concentrate moisture; with Artemisia dracunculus, A.ludoviciana, Scorzonera laciniata, Alyssum simplex, Astragalus sp., and Bromus inermis.
iNaturalist Observation 280624751.
Along the City of Golden 6th Avenue Trail just inside the southwest boundary of the Parfet Prehistoric Preserve, part of the Morrison-Golden Fossil Area National Natural Landmark, 1.65 km. south of the GNIS location of Golden.
Tom Schweich 3385.
12 May 2025.
(
OBI
)
.
.
Ambrosia psilostachya DC. Western Ragweed. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 40 cm., woody at base; Leaves opposite below, alternate above, 50 mm. × 22 mm., ovate, pinnately divided; Inflorescence indeterminate, appearing raceme-like, 2 kinds of flowers, pistillate heads many, distal, carpellate heads few, clustered in distal leafy axils; Phyllaries fused into a cup; Receptacle not chaffy; Pappus absent (Described from Coll. No. 1068, 8 Oct 2014).
- Grampsas North Open Space (City of Golden), 4295. 7/25/2025. .
- Parfet Open Space (City of Golden), 4171. 6/1/2025. .
- Heritage Dells, South Gulch, 6114. 6/1/2026. .
- Kinney Run, Tom Schweich 1637. 7/6/2018. .
- Magic Mountain Archeological Site, 4357. 7/30/2025. .
- North Hogback Open Space (City of Golden), 4522. 4/11/2026. .
- Schweich Hill, Northeast sector, just west of the mowed area, among smooth brome. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1748. 31 Aug 2017. ( EIU KHD00065354‡ ) Southwest aspect, top of hill, gravel-covered upturned Laramie and Arapahoe Formations. Other collections identify this location as “North Washington Open Space.” Top of hill, center of parcel, 1.77 km. (geodesic) north northwest of the GNIS location of Golden. Tom Schweich 3220. 12 Sep 2023. ( UCR ) .
- South Table Mountain Open Space (City of Golden), West side of South Table Mountain, along south loop of Lubahn Trail, 1.17 km east southeast of the GNIS location of Golden. Tom Schweich 1069. 16 Oct 2014. ( OBI82121‡ ) .
- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2196. 6/12/2021. .
- Tripp Ranch Meadow Open Space,
Tom Schweich 3564.
6/8/2024.
.
.
Antennaria . Pussytoes. CalPhotos. Jepson eFlora. SEINet Taxon.
- Tripp Ranch Meadow Open Space, Tom Schweich 3565. 6/8/2024. . .
Arctium minus Bernh. Lesser Burdock. Weed: CO DofA, List: C. CalPhotos. Jepson eFlora. SEINet Taxon.
- Deadman Gulch, Also seen in several other places along Deadman Gulch. Colorado Noxious Weed List C. Along Deadman Gulch (Kinney Run), between US Highway 6 and Eagle Ridge Drive, on a bank of the creek, 3.24 km. south of the GNIS location of Golden. Tom Schweich 2425. 17 Aug 2020. ( CDA0053776‡ COLO2433811‡ CS198694‡ KHD00073455‡ ) .
- Stonebridge Homeowners Association, Tom Schweich 3303. 6/21/2023. .
- Welch Ditch (Open Space),
4695.
4/25/2026.
.
.
 Obs. No. 3819, Arctium minus. |
 Coll. No. 2425, Arctium minus. |
 Coll. No. 3302, Arctium minus. |
Arnica fulgens Pursh. Shining Leopardbane. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb of wetlands, moist, or somehow equible areas, to 35 cm., glandular hairy throughout; Leaves, mostly basal and few cauline, basal, axils with 5 mm. brown wavy hair, petiole 50-70 mm. + blade 60-100 mm. × 12-30 mm. wide, 3.3-5 × longer than wide, lanceolate, tip obtuse, cauline, opposite, sessile, ±2 pair, much reduced; Inflorescence, showy, single heads on peduncle to 80 mm., flowers of two kinds; Involucre, 13-15 mm. × 22-30 mm. wide; Phyllaries, 2 ±equal series, 11-14 mm.× 3-3.5 mm. wide, margins, flat, tips, obtuse green with dark tips glandular-hairy abaxially; Receptacle epaleate; Rays, #12, fertile, tube 3-5 mm. + blade 16-19 mm. × 7-7.5 mm. wide = 19-24 mm., corolla yellow; Disc flowers, tube 7-7.5 mm. + lobes ≤1 mm. = 8-8.5 mm.; Pappus, bristles, 9 mm., white, barbelate; Anther, yellow; Achene, 5 mm., short hairy. Described from Coll. Nos. 1119, 1371, and 1871. Subtribe Arnicinae is a sister subtribe to Madiinae (tarweeds) and Hulseinae, which contains both Hulsea and Eatonella, both common in the Mono Lake basin. Described by Pursh in Fl. Am. Sept. 2: 527 “On the banks of the Missouri,” but this is not a Lewis & Clark collection. Perhaps it is a Nuttall collection from 1810. Holotype: BM?, Isotype: PH.
- Parfet Open Space (City of Golden),
Also collected here: Juncus arcticus var. balticus.
This parcel was designated a City of Golden Open Space in 2025.
Edge of the parasailer landing field along US Highway 6, below the Welch Ditch, near the northeast boundary of the open space, disturbed mixed-grass prairie, 930 m. southwest of the GNIS location of Golden.
Tom Schweich 3394.
1 Jun 2025.
(
EIU
FLD
OBI
)
.
.
Artemisia campestris L. Field Sagewort. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 60 cm., longer lived than biennial; Stem, 4± per caudex, reddish; Leaves, basal mostly withered, cauline, 8 mm. × 0.6 mm. wide, narrowly oblanceolate, tomentose; Inflorescence, 130 mm. × 20 mm. wide; Heads, many, 2 mm. × 2 mm. wide; Phyllaries, 2+ series, 1.5 mm. × 1 mm. wide, green to scarious; Receptacle, naked. Described fromColl. No. 1767, 1 Sep 2017. Note: It is important to note presence or absence of a basal rosette when collecting.
- Schweich Hill,
Tom Schweich 2117.
5/16/2021.
.
.
 Coll. No. 1767, Artemisia campestris |
 Inflorescence of Coll. No. 1767, Artemisia campestris |
Artemisia campestris L. ssp. caudata (Michx.) Palmer & Steyerm. (Syn: Oligosporus caudatus (Michx.) Poljakov ) Field Sagewort. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Open Space (City of Golden), With Artemisia ludoviciana and Alyssum simplex. Top of the ridge in the northeast part of the Open Space, near the windsock for the hang gliders, appears to be pre-development topography, 918 m. southwest of the GNIS location of Golden. Tom Schweich 3519. 11 Sep 2025. ( KHD ) . .
Artemisia dracunculus L. (Syn: Oligosporus dracunculus (L.) Poljakov ssp. glaucis (Pall. ex Willd.) A. Löve & D. Löve ) Tarragon, Dragonwort. CalPhotos. Jepson eFlora. SEINet Taxon.
- Grampsas North Open Space (City of Golden), 3919. 12/7/2024. Also here: Thelesperma megapotamicum, Alyssum simplex, Pediomelum tenuiflorum, Linaria dalmatica, and Hesperostipa comata. This area was designated a City of Golden open space in 2025. Northern portion of the Tony Grampsas Memorial Sports Complex, lower northeast slope of small alluvial hill, southeast side of North Table Mountain, 4.02 km. (geodesic) northeast of the GNIS location of Golden. Tom Schweich 3525. 15 Sep 2025. ( OBI ) .
- Kinney Run South, 3972. 1/3/2025. 4488. 4/9/2026. .
- Heritage Dells, North Gulch, 4625. 4/23/2026. .
- Heritage Dells, South Gulch, 6144. 6/1/2026. .
- Magic Mountain Archeological Site, 4344. 7/30/2025. open ground ca 2 1/2 mi S of Golden. T R70W S10. Ernest H. Brunquist 66. 23 Sep 1959. ( CS37489‡ ) .
- North Table Mountain Open Space (City of Golden), Uppermost southwest slopes of North Table Mountain, just below the basalt flow capping the mesa, 1.7 km. north of the GNIS location of Golden. Tom Schweich 1554. 1 Sep 2016. ( EIU JCOS s.n. KHD00063997‡ OBI83374‡ UC ) .
- Parfet Prehistoric Preserve, 4011. 4/30/2025. .
- Schweich Hill, Eastern slope adjacent to social trail over the top of the hill. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1754. 31 Aug 2017. ( KHD00065159‡ UCR289253‡ ) .
- Tripp Ranch Meadow Open Space,
2752.
6/10/2022.
.
.
 Coll. No. 1754, Artemisia dracunculus |
 Coll. No. 1754, Artemisia dracunculus |
Artemisia frigida Willd. Prairie Sagewort. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 30 cm., woody at base; Stems many; Leaves alternate, 9 mm., pinnately dissected into 7 parts, silvery hairy; Inflorescence raceme-like, indeterminate, heads 1-3 in axils; Heads have only disk flowers, all alike; Involucre of hairy phyllaries; Phyllaries in 2 series, hairy, not gummy or with tips recurved; Receptacle hairy, not chaffy or bristly; Flowers fertile; Pappus absent; (Described from Coll. No. 1067, 8 Oct 2014).
- Grampsas North Open Space (City of Golden), 3913. 12/7/2024. .
- Kinney Run South, 3983. 1/3/2025. 4474. 4/9/2026. .
- Kinney Run, 4453. 3/30/2026. .
- Magic Mountain Archeological Site, open ground ca 2 1/2 mi S of Golden. T R70W S10. Ernest H. Brunquist 53. 10 Sep 1959. ( CS37477‡ ) Tom Schweich 1651. 4/18/2018. .
- North Hogback Open Space (City of Golden), Tom Schweich 1708. 6/14/2019. .
- Parfet Prehistoric Preserve, 4001. 4/30/2025. .
- Schweich Hill, Tom Schweich 1543. 5/2/2017. .
- South Table Mountain Open Space (City of Golden), 6036. 5/13/2026. .
- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2197. 6/12/2021. .
- Tripp Ranch Meadow Open Space,
2783.
6/10/2022.
.
.
 Coll. No. 1067, Artemisia frigida |
 Coll. No. 3507, Artemisia frigida. |
 Coll. No. 1067, Artemisia frigida |
 Coll. No. 1067, Artemisia frigida |
Artemisia ludoviciana Nutt. Silver Wormwood. CalPhotos. Jepson eFlora. SEINet Taxon.
- Cressmans Gulch, 4579. 4/15/2026. .
- Grampsas North Open Space (City of Golden), 3915. 12/7/2024. .
- Kinney Run South, 3966. 1/3/2025. 4476. 4/9/2026. .
- Parfet Open Space (City of Golden), 4102. 6/1/2025. .
- South Illinois Open Space, 3936. 12/20/2024. .
- Heritage Dells, North Gulch, 4616. 4/23/2026. .
- Heritage Dells, South Gulch, 4506. 4/9/2026. .
- Magic Mountain Archeological Site, Tom Schweich 1643. 4/18/2018. .
- North Hogback Open Space (City of Golden), Tom Schweich 1697. 6/14/2019. .
- North Table Mountain Open Space (City of Golden), 4197. 6/23/2025. .
- Parfet Prehistoric Preserve, 3992. 4/30/2025. .
- Schweich Hill, Tom Schweich 1516. 3/27/2017. Var. ludoviciana if infraspecific names are to be applied. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1753. 31 Aug 2017. ( CS198648‡ KHD00065158‡ ) .
- South Table Mountain Open Space (City of Golden), 6012. 5/13/2026. .
- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2198. 6/12/2021. .
- Tripp Ranch Meadow Open Space,
2739.
6/10/2022.
.
.
 Something is parasitizing my Artemisia |
 Coll. No. 1281, Artemisia ludoviciana |
 Entire leaves of Coll. No. 1281, Artemisia ludoviciana |
Artemisia ludoviciana Nutt. ssp. ludoviciana. (Syn: A. britonii Rydb. ) White Sagebrush. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 40 cm, unarmed, spreading by rhizomes; Leaf tomentose abaxially, sparse tomentose adaxially, proximal wedge-shaped, 40 mm × 15 mm wide, 3+-toothed, ≤⅓ leaf-width, distal lanceolate, entire (Described from Coll. No. 898, 24 August 2012, Frequency and depth of leaf lobing distinguishes between ssp. ludoviciana and ssp. incompta. These leaves are neither 2°-divided, nor deeper than ⅓-width, nor divided nearly to the mid-rib. Therefore, ssp. ludoviciana is applied rather than ssp. incompta).
- Schweich Hill,
This area was graded then revegetated circa 2006, though this taxon is more likely adventive rather than revegetated. Other collections may identify this location as “North Washington Open Space.”
Near the western border of Schweich Hill, about mid-way up the slope, 1.81 km. (geodesic) north northwest of the GNIS location of Golden.
Tom Schweich 3219.
12 Sep 2023.
(
CAS718172‡
CDA56591‡
OBI
UCR307021‡
)
.
.
 Coll. No. 898, Artemisia ludoviciana ssp. ludoviciana |
 Coll. No. 3191, Artemisia ludoviciana ssp. ludoviciana. |
 Coll. No. 898, Artemisia ludoviciana ssp. ludoviciana |
Brickellia Elliott. Brickel Bush. CalPhotos. Jepson eFlora. SEINet Taxon.
- Magic Mountain Archeological Site, Tom Schweich 1657. 4/18/2018. . .
Brickellia californica (Torrey & A. Gray) A. Gray. California Brickelbush. CalPhotos. Jepson eFlora. SEINet Taxon.
- Grant Terry Open Space, iNaturalist Observation 315594127. keolsen 5936. 9/21/2025. .
- South Table Mountain Open Space (City of Golden),
6061.
5/13/2026.
.
.
Brickellia eupatorioides (L.) Shinners. False Boneset. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb,
to 40 cm.;
Leaves,
alternate,
short-petioled (2 mm.),
48 mm. × 7 mm. wide,
lanceolate,
tip obtuse,
margin entire,
glandular-punctate, sparsely strigose;
Inflorescence,
corymbiform,
heads in groups of 4-5;
Involucre,
8.5 mm. × 6 mm. wide;
Phyllaries,
3+ series,
graduated,
2-8.5 mm. × 0.5 mm. wide,
prominently veined “longitudinally striate,”
margin scarious,
tip acuminate to spinulose;
Receptacle,
epaleate;
Disk flowers,
#19,
corolla, 7 mm., yellow;
Pappus,
plumose bristles,
6 mm.;
Cypsela,
many ribs (maybe 10).
(Described from Coll. No. 1553, 1 Sep 2016.)
- Cottonwood Natural Area, 3946. 12/27/2024. .
- Grampsas North Open Space (City of Golden), 3922. 12/7/2024. Also here: Symphyotrichum ericoides, Pediomelum tenuiflorum, Potentilla recta, and Bromus inermis. This area was designated a City of Golden open space in 2025. Northern portion of the Tony Grampsas Memorial Sports Complex, lowest northeast slope of small alluvial hill, southeast side of North Table Mountain, 4.10 km. (geodesic) northeast of the GNIS location of Golden. Tom Schweich 3526. 15 Sep 2025. ( UCR ) .
- Schweich Hill,
On a bank that was formerly cut, unknown whether it was intentionally regevetated or not.
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden.
Tom Schweich 1758.
31 Aug 2017.
(
CAS
KHD00065163‡
UCR ‡
)
20-30 plants mostly concentrated in a 10 m x 10 m patch, scattered in Bromus inermis with Artemisia dracunculus, Ericameria nauseosa var. graveolens, and Liatris punctata.
Mowing occurred from approximately 2007 to 2018. Other collections may identify this location as “North Washington Open Space.”
Near the northern border of Schweich Hill, in the eastern section that was mowed by neighbors for about twenty years, 1.75 km. (geodesic) north northwest of the GNIS location of Golden.
Tom Schweich 3218.
12 Sep 2023.
(
OBI
)
top of hill, both sides of social trail
Tom Schweich 3396.
9/12/2023.
Numerous plants in an area formerly mowed by neighbors.
Tom Schweich, with Cathy Hansen-Stamp and Barry Stamp 2455.
9/25/2021.
.
.
Carduus nutans L. (Syn: Carduus nutans L. ssp. macrolepis (Peterman) Kazmi ) Nodding Plumeless Thistle. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual, to 55 cm., tap-rooted, branched at base; Leaves, basal, withered at flowering, cauline, alternate, decurrent 40 mm. + blade 75 mm. × 25 mm. wide, pinnately lobed, margins spiny; Inflorescence, single heads on spiny tomentose peduncles 2.5-15 cm.; Phyllaries, many graduated series, 9-20 mm. × 1-3 mm. wide, thick at base, mostly green, purplish at margins, mid-vein prominent, tip spiny; Receptacle, alveolate (honeycombed), flat, bristly; Disk flowers, 25 mm., color purple; Pappus, capillary bristles, 18 mm. (Described from Coll. No. 1517, 24 July 2016.)
- Grampsas North Open Space (City of Golden), 4293. 7/25/2025. .
- Parfet Open Space (City of Golden), 4258. 7/16/2025. .
- Kinney Run, West slope of the hogback on the east side of Kinney Run, between the Cambria Lime Kiln and Tripp Ranch, 3.22 km. south southeast of the GNIS location of Golden. Tom Schweich 1968. 6 Jul 2018. ( COLO02348563‡ KHD00069210‡ OBI170768‡ UC ) .
- North Hogback Open Space (City of Golden), 4266. 7/20/2025. .
- North Table Mountain Open Space (City of Golden), 4196. 6/23/2025. 4206. 6/23/2025. .
- Schweich Hill, Determination tentative. Tom Schweich 1526. 3/27/2017. Colorado Noxious Weed List B. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue. Southwestern slope, probably in the revegetated zone. Tom Schweich 1711. 14 Jul 2017. ( KHD00065333‡ UCR ‡ ) .
- South Table Mountain Open Space (City of Golden), 6037. 5/13/2026. .
- Stonebridge Homeowners Association, Tom Schweich 3294. 6/21/2023. .
- Tripp Ranch Meadow Open Space,
Tom Schweich 3568.
6/8/2024.
.
.
 Carduus nutans rosette. |
 Coll. No. 1711, Carduus nutans |
 Coll. No. 2551, Carduus nutans |
Centaurea . Knapweed NOIBN. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Prehistoric Preserve, 4024. 4/30/2025. . .
Centaurea diffusa Lam. (Syn: Acosta diffusa (Lam.) Soja' k ) Diffuse Knapweed. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon.
Biennial/Perennial herb, to 50 cm.; Leaves, cauline, alternate, 30 mm. × 12 mm. wide, pinnately lobed, much reduced and entire above, spine-tipped, margins not spiny; Inflorescence, heads borne singly, flowers of one kind; Involucre, 10 mm.; Phyllaries, 4+ series, graduated, 3.5-10.0 mm., all spine tipped, outer and middle with marginal fringe spines; Receptacle, flat, epaleate, bristly; Disk flowers, inner bisexual, Corolla, tube 7.5 mm. + lobes 3 mm., white; Pappus, 0, or very thin ring of scales. Described from Coll. No. 1233, 20 Jul 2015.
- Magic Mountain Archeological Site, Tom Schweich 1646. 4/18/2018. .
- North Hogback Open Space (City of Golden), Tom Schweich 1719. 6/14/2019. .
- Schweich Hill,
Tom Schweich 1544.
5/2/2017.
.
.
 Coll. No. 2676.3, Centaurea diffusa |
 Coll. No. 1233, Centaurea diffusa |
 Coll. No. 1233, Centaurea diffusa |
Cichorium intybus L. Common Chicory. CalPhotos. Jepson eFlora. SEINet Taxon.
- Magic Mountain Archeological Site,
4356.
7/30/2025.
.
.
 Habitat of Coll. No. 1223, Cichorium intybus |
Cirsium arvense (L.) Scop. (Syn: Breea arvensis (L.) Lessing ) Canada Thistle. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual, to 70 cm., tap-rooted; Leaves, cauline, alternate, sessile but not obviously decurrent, 85 mm. × 20 mm. wide, margin sinuate, spiny, adaxial thinly tomentose, abaxial tomentose; Inflorescence, panicle(?); Heads, many, 30±, 15 mm. × 8 mm. dia., disk flowers only, dioecious, staminate heads, pappus < corolla, pistillate heads, pappus > corolla; Phyllaries, many (6-7) series, outer 3 mm. × 1.5 mm. wide, inner 15 mm. × 1 mm. wide, dark dorsal ridge, tips, spinulose, reflexed; Receptacle, soft bristles, 10 mm.; Pappus, plumose bristles (Described from Coll. No. 1512, 24 July 2016).
- Coors Tech Wetland Open Space, 5975. 5/11/2026. .
- Cressmans Gulch, 4549. 4/15/2026. .
- Deadman Gulch, South side of gulch, growing in woody shrubs. Also collected here: Epilobium hirsutum, Solanum dulcamara, and Dactylis glomerata. Near the junction of Deadman Gulch and Kinney Run, 2.28 km. south of the GNIS location of Golden Tom Schweich 2407. 31 Jul 2020. ( COLO2433993‡ OBI186046‡ REGIS ) .
- Grampsas North Open Space (City of Golden), 4305. 7/25/2025. .
- Heritage Dells, North Gulch, 4647. 4/23/2026. .
- Heritage Dells, South Gulch, 4498. 4/9/2026. .
- North Table Mountain Open Space (City of Golden), 4205. 6/23/2025. .
- Parfet Prehistoric Preserve, 4059. 5/12/2025. .
- Schweich Hill, East end of parcel amid a dense infestation of smooth brome. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1701. 14 Jul 2017. ( KHD00065460‡ UCR ‡ ) .
- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2199. 6/12/2021. .
- Tripp Ranch Meadow Open Space, 2744. 6/10/2022. .
- Tucker Gulch (lower), Tom Schweich 2906. 7/6/2022. .
- Welch Ditch (Open Space),
4717.
4/25/2026.
4723.
4/25/2026.
.
.
 Coll. No. 1200, Cirsium arvense |
 Coll. No. 3210, Cirsium arvense. |
 Coll. No. 1512, Cirsium arvense |
 Coll. No. 2773, Cirsium arvense |
Cirsium undulatum (Nutt.) Spreng. Wavy Leaved Thistle. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial thistle, to 30 cm., stout tap root; Stem, leafy, 20 cm.; Leaves, basal and cauline, basal, petiole 25 mm. + blade 180 mm. × 55 mm. wide, oblanceolate, pinnately lobed more than half-way to mid-rib, cauline, reduced above, decurrent 5 mm., 45 mm. × 14 mm. wide, lanceolate, surface, adaxial, thinly tomentose, abaxial, tomentose, margins, spiny; Head, 35 mm. × 40 mm. wide, indented around top of peduncle; Phyllaries, many (7?) series, 13 mm. × 3.5 mm. wide, + robust spine 5-6 mm., body dark dorsal ridge, outer and middle reflexed; Flowers, 1 kind; Disk flowers, 25-36 mm., corolla pink-purple; Pappus, plumose bristles; Cypsela, 5 mm., apical collar unremarkable. (Described from Coll. No. 1460, 27 June 2016).
- Kinney Run South, 4481. 4/9/2026. .
- Parfet Open Space (City of Golden), 4164. 6/1/2025. .
- Grant Terry Open Space, iNaturalist Observation 217321240. geoskimom 5937. 5/20/2024. .
- North Hogback Open Space (City of Golden), 4269. 7/20/2025. Tom Schweich 1712. 6/14/2019. .
- North Table Mountain Open Space (City of Golden), 4215. 6/27/2025. .
- Parfet Prehistoric Preserve, 4064. 5/12/2025. .
- Schweich Hill, in mowed area Tom Schweich 1549. 5/2/2017. .
- Stonebridge Homeowners Association,
Tom Schweich, with Ann Norton 2200.
6/12/2021.
.
.
Cirsium vulgare (Savi) Ten. Bull Thistle. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon.
Leaves, adaxial face with slender appressed bristle-like prickles.
- North Hogback Open Space (City of Golden), 4268. 7/20/2025. .
- Stonebridge Homeowners Association,
Tom Schweich 3245.
6/13/2023.
.
.
 Coll. No. 3237, Cirsium vulgare. |
 Coll. No. 3237, basal rosette of Cirsium vulgare. |
 Leaf tip of Cirsium vulgare, Coll. No. 1035 |
Conyza canadensis (L.) Cronquist. (Syn: Erigeron canadensis (L.) Cronquist ) Canadian Horseweed. CalPhotos. Jepson eFlora. SEINet Taxon.
- Magic Mountain Archeological Site,
open ground
ca 2 1/2 mi S of Golden. T R70W S10.
Ernest H. Brunquist 8.
14 Aug 1959.
(
CS23863‡
)
.
.
 Ratzloff collection of Conyza canadensis in Golden. |
 Collection No. 518, Erigeron canadensis |
Crepis occidentalis Nutt. (Syn: Psilochenia occidentalis (Nutt.) Nutt. ) Largeflower Hawksbeard. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial, herb, to 25 cm., taprooted; Stem, green, tomentose, glandular, no bristles; Leaves, basal and cauline, alternate, petiole 20 mm. + blade 56 mm. × 17 mm. wide, reduced distally, pinnately lobed nearly to mid-rib, segments deltoid, tomentose, glandular; Inflorescence, heads #3 per stem, showy, >leaves; Peduncles, 23 mm.; Involucre, 12 mm. × 12 mm. wide, cyindric, tomentose; Phyllaries, 2 graduated series, 3.5 mm. &tmes; 2 mm. wide, deltoid, 12.5 mm. × 3 mm. wide, lanceolate, ±flat, tomentose, gland-tipped black bristles evenly distributed; Receptacle, epaleate; Ray flowers (ligules), many, tube 6 mm. + blade 12.5 mm. × 2.4 mm. wide, yellow; Pappus, 9 mm. well-developed, bristles, ±equal, smooth; Fruit, 2 mm. × 1.3 mm. wide, brown, glabrous. (Described from Coll. No. 1894, 28 May 2018).
- Eagle Ridge, in bloom Tom Schweich 3036. 5/9/2023. .
- Parfet Open Space (City of Golden), 4110. 6/1/2025. .
- Schweich Hill, Tom Schweich 2116. 5/16/2021. .
- Stonebridge Homeowners Association,
Tom Schweich 3244.
6/13/2023.
.
.
Crepis occidentalis Nutt. ssp. costata (A. Gray) Babcock & Stebbins. Largeflower Hawksbeard. CalPhotos. Jepson eFlora. SEINet Taxon.
- Eagle Ridge, Tract A, Common in this field of remnant mixed-grass prairie, drier patch dominated by Artemisia ludoviciana, stiff clay soil. Subsp. costata if infraspecific names are to be applied. City-owned parcel north of “Eagle Ridge” between CSM Survey Field and US Highway 6, about 50 m. northwest of the Kinney Run Trail, 2.38 km. (geodesic) south of the GNIS location of Golden Tom Schweich 2978. 19 Jun 2023. ( CAS716683‡ CDA56580‡ CS202047‡ UCR307100‡ ) .
- Tripp Ranch Meadow Open Space,
Subspecies costata (A. Gray) Babcock & Stebbins, if infraspecific names are to be applied.
Small (1.7 ac) parcel deeded to the city as part of the Tripp Ranch development, sandwiched between Jefferson County Open Space, Stonebridge HOA open space, and private residences, accessed from Crawford St., 4.41 km. south of the GNIS location of Golden.
Tom Schweich 2793.
10 Jun 2022.
(
COLO2793388‡
)
.
.
 Coll. No. 3265, Crepis occidentalis ssp. costata. |
Cyclachaena xanthiifolia (Nutt.) Fresen. (Syn: Iva xanthiifolia Nutt. ) (=Euphrosyne xanthiifolia (Nutt.) A.Gray) Carelessweed. CalPhotos. Jepson eFlora. SEINet Taxon.
- Deadman Gulch,
Also seen around the edge of the pond and along the Kinney Run Trail nearly to Eagle Ridge Drive. The pond and dam were reconstructed in late 2016 so these would have established here since then.
Along Deadman Gulch (Kinney Run), between US Highway 6 and Eagle Ridge Drive, collected at the edge of the concrete of the retention pond dam, 3.18 km. south of the GNIS location of Golden.
Tom Schweich 2423.
17 Aug 2020.
(
COLO2433910‡
KHD00073442‡
OBI186037‡
)
.
.
 Coll. No. 2423, Cyclachaena xanthiifolia |
Dieteria bigelovii (A. Gray) D. R. Morgan & R. L. Hartman var. bigelovii. Bigelow's Tansy Aster. CalPhotos. Jepson eFlora. SEINet Taxon.
- Grampsas North Open Space (City of Golden),
3911.
12/7/2024.
.
.
Ericameria nauseosa (Pall. ex Pursh) G.L.Nesom & G.I.Baird var. graveolens (Nutt.) Reveal & Schuyler. (Syn: E. n. (Pall. ex Pursh) G.L.Nesom & G.I.Baird var. glabrata (Gray) G.L. Nesom & Baird ) Goldy-Locks. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space, 5974. 5/11/2026. 6001. 5/11/2026. .
- Cressmans Gulch, 4568. 4/15/2026. 4578. 4/15/2026. .
- Grampsas North Open Space (City of Golden), 3926. 12/7/2024. Dense stand of Ericameria nauseosa var. graveolens with Ambrosia psilostachya, Chenopodium album, Physalis hederifolia, and Bromus japonicus. Compare to Coll. No. 3524 of var. nauseosa collected 131 m. to the southeast. This area was designated a City of Golden open space in 2025. Northern portion of the Tony Grampsas Memorial Sports Complex, flat field, southeast side of North Table Mountain, 4.10 km. (geodesic) northeast of the GNIS location of Golden. Tom Schweich 3528. 15 Sep 2025. ( CAS ) .
- Kinney Run South, 3977. 1/3/2025. 4463. 4/9/2026. .
- Parfet Open Space (City of Golden), 4101. 6/1/2025. .
- South Illinois Open Space, 3940. 12/20/2024. .
- Heritage Dells, North Gulch, 4598. 4/23/2026. 4615. 4/23/2026. .
- Kinney Run, Tom Schweich 1636. 7/6/2018. .
- Magic Mountain Archeological Site, open ground. ca 2 1/2 mi S of Golden. T R70W S10. Ernest H. Brunquist 69. 26 Sep 1959. ( CS37486‡ ) Tom Schweich 1663. 4/18/2018. .
- North Table Mountain Open Space (City of Golden), 4200. 6/23/2025. With Artemisia ludoviciana, Carduus nutans, Heliomeris multiflora var. multiflora, Turritis glabra, Toxicoscordion paniculatum, and Bromus inermis. This area was designated a City of Golden open space in 2025. Compare to Coll. No. 3534 of var. nauseosa which was collected about 15 meters to the south. Along a social trail towards the north end of the North Table Mountain Open Space, in a flat area that is probably the head of an ancient landslide, 2.42 km. (geodesic) north of the GNIS location of Golden. Tom Schweich 3535. 18 Sep 2025. ( KHD ) .
- Schweich Hill, Tom Schweich 1501. 3/27/2017. Collected nearby: Lomatium orientale, Mertensia lanceolata, Colutea arboescens, Psoralidium tenuiflorum, and Viola nuttallii. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 2.31 km. north northwest of the GNIS location of Golden (on 12th Street near the Buffalo Rose Saloon). Tom Schweich 2229. 12 Sep 2019. ( CDA0052315‡ COLO2433647‡ EIU KHD00074458‡ OBI186063‡ REGIS UCR ) Tom Schweich 3044. 5/21/2023. .
- Stonebridge Homeowners Association, Tom Schweich 3248. 6/13/2023. Tom Schweich 3295. 6/21/2023. Tom Schweich, with Ann Norton 2201. 6/12/2021. .
- Tripp Ranch Meadow Open Space, 2780. 6/10/2022. .
- Welch Ditch (Open Space),
4696.
4/25/2026.
.
.
Ericameria nauseosa (Pall. ex Pursh) G. I. Nesom & G. I. Baird var. nauseosa. (Syn: Chrysothamnus plattensis Greene ) Rubber Rabbitbush. CalPhotos. Jepson eFlora. SEINet Taxon.
- Eagle Ridge, Tom Schweich 1980. 7/24/2020. With Rhus trilobata, Cercocarpus montanus, Pediomelum tenuiflorum, Linum lewisii, and dried-up grasses. See also Coll. No. 2440., same taxon and location, 11 days later. Low on the north and east slopes of “Eagle Ridge,” an informally named hogback between US Highway 6 and Deadman Gulch (Kinney Run), 3.26 km. south of the GNIS location of Golden. Tom Schweich 2421. 17 Aug 2020. ( KHD00073444‡ ) See also Coll. No. 2421, same taxon and location, 11 days earlier. North slope of “Eagle Ridge,” an informally named hogback between US Highway 6 and Deadman Gulch (Kinney Run), just below the Cercocarpus montanus, 3.26 km. south of the GNIS location of Golden. Tom Schweich 2440. 28 Aug 2020. ( CAS COLO2433845‡ OBI186034‡ UCR297671‡ ) .
- Grampsas North Open Space (City of Golden), 3899. 12/7/2024. 4281. 7/25/2025. With: Artemisia dracunculus, Alyssum simplex, Opuntia macrorhiza, Bromus tectorum, and Hesperostipa comata. Compare to Coll. No. 3528 of var. graveolens collected 131 m. to the northwest. This area was designated a City of Golden open space in 2025. Northern portion of the Tony Grampsas Memorial Sports Complex, lower northeast slope of small alluvial hill, southeast side of North Table Mountain, 4.06 km. (geodesic) northeast of the GNIS location of Golden. Tom Schweich 3524. 15 Sep 2025. ( CAS ) .
- Parfet Open Space (City of Golden), Between Kraschininnikovia lanata and E. nauseosa var. graveolens. 4232. 7/7/2025. .
- Kinney Run, with var. graveolens, Ambrosia psilostachya, and Rhus trilobata. Tom Schweich 1986. 7/31/2020. .
- North Table Mountain Open Space (City of Golden), 4199. 6/23/2025. 4213. 6/27/2025. With Artemisia ludoviciana, Carduus nutans, Heliomeris multiflora var. multiflora, Turritis glabra, Toxicoscordion paniculatum, and Bromus inermis. This area was designated a City of Golden open space in 2025. Compare to Coll. No. 3535 of var. graveolens which was collected about 15 meters to the north. Along a social trail towards the north end of the North Table Mountain Open Space, in a flat area that is probably the head of an ancient landslide, 2.41 km. (geodesic) north of the GNIS location of Golden. Tom Schweich 3534. 18 Sep 2025. ( KHD ) .
- South Table Mountain Open Space (City of Golden), on the edge of the Lubahn Trail Tom Schweich 3326. 7/7/2023. .
- Stonebridge Homeowners Association,
Tom Schweich 3247.
6/13/2023.
Tom Schweich 3296.
6/21/2023.
.
.
Erigeron . Fleabane. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Prehistoric Preserve,
4023.
4/30/2025.
.
.
 Coll. No. 2724, Erigeron sp. (?) as it came out of the press. |
 Coll. No. 2724, Erigeron sp. |
Erigeron divergens Torr. & A. Gray. Spreading Fleabane. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual or short-lived perennial, to 15 cm., tap-rooted, ±spreading hairy throughout, becoming minutely glandular above, hairs multicellular with clear crosswalls; Leaves, basal, absent or withered; cauline, alternate, petiole ±10 mm. + blade ±12 mm. × 2.4 mm. wide, uniformly hairy, somewhat reduced above; Inflorescence, heads borne singly on leafy stems, peduncles spreading or decurved, but cannot be described as “heads nodding;” Involucre, 3 mm. × limb 12 mm.; Receptacle, epaleate; Flowers, 2 kinds; Rays, corolla, 3.5 mm., white fading blue; Disk flowers, corolla, 1.7 mm., yellow; Pappus, short scales and longer capillary bristles, similar on ray and disk flowers; Cypsela, 0.8 mm. (Described from Coll. No. 1489. 13 July 2016. See also Coll. No. 3381).
- Coors Tech Wetland Open Space, 5970. 5/11/2026. .
- Parfet Open Space (City of Golden), 4126. 6/1/2025. .
- Heritage Dells, South Gulch, Tom Schweich 3590. 1 Jun 2026. ( Undist. ) .
- North Hogback Open Space (City of Golden), Tom Schweich 1692. 6/14/2019. .
- Schweich Hill, West-central part of hill, southwest slope. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1668. 16 Jun 2017. ( KHD00065482‡ UCR ‡ ) Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 2.27 km. northwest of the GNIS location of Golden. Tom Schweich 2092. 26 Jun 2019. ( KHD00070525‡ ) .
- South Table Mountain Open Space (City of Golden), 6034. 5/13/2026. in soil pocket, S. Table Mt.; on top of Castle Rock. 13N 0482000E 4400400N. Peter G. Root 8311. 1 Jul 1983. ( KHD19410‡ ) .
- Stonebridge Homeowners Association,
Tom Schweich, with Ann Norton 2202.
6/12/2021.
.
.
Erigeron flagellaris A. Gray. Trailing Fleabane. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial, to 5-6 cm., with scapose inflorescence to 9 cm., spreading by leafy stoloniferous branches; Leaves, basal and cauline, entire, basal, linear-oblanceolate, 35 mm. × 2.5 mm., cauline, linear, 13 mm. × 1.5 mm.; Inflorescence, single heads on scape to 8 cm.; Receptacle epaleate; Phyllaries, 2+series, ±equal, 4 mm., hairy abaxially, ascending multicellular hairs with clear crosswalls, glandular between hairs; Flowers of 2 kinds; Pappus of bristles, 2 mm., + short scales, that of ray and disc flowers alike; Rays, #±80, corolla white, fading lilac, 8 mm. × 0.5 mm.; Disc flowers, corolla yellow, lobes triangular; Achene, short hairy. (Described from Coll. No. 1116, 28 May 2015).
- Kinney Run, Thin vegetation on sandstone. On the west limb of a small hogback, about 2/3 of the way up from Kinney Run to the crest of the hogback, 3.1 km. south of the GNIS location of Golden. Tom Schweich 1829. 16 May 2018. ( CAS1080038‡ COLO02347615‡ CS198643‡ UCR 289030‡ ) .
- Stonebridge Homeowners Association,
peduncle hairs appressed
Tom Schweich 3246.
6/13/2023.
.
.
 Coll. No. 2537.1, Erigeron flagellaris |
 Coll. No. 1116, Erigeron flagellaris |
 Coll. No. 1829, Erigeron flagellaris |
 Coll. No. 1829, Erigeron flagellaris |
Erigeron pumilus Nutt. Shaggy Fleabane. CalPhotos. Jepson eFlora. SEINet Taxon.
- Eagle Ridge, On mesa slope in foothills of the Front Range. Transferred from USGS Herbarium, Denver, CO (2005). Foothills of the Front Range, at junction of US 6 and road to Morrison. Hansford T. Shacklette 5889. 27 Jun 1959. ( COLO528406‡ ) On mesa slope in foothills. Foothills of the Front Range, at junction of US 6 and road to Morrison, about 1 mile east of Golden. Hansford T. Shacklette 5890. 27 Jun 1959. ( COLO528414‡ ) . .
Erigeron tracyi Greene. (Syn: E. cinereus A. Gray , E. colomexicanus A. Nelson , E. divergens Torrey & A. Gray var. cinereus A. Gray ) Running Fleabane. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, 20-25 cm., caudex simple (not stout) non-rhizomatous, hairy throughout, with hairs 0.2-0.4 mm. spreading in all directions, glandular at high magnification; Stem, some with prior year's branches assumed to have been stoloniferous; Leaves, basal and cauline, basal, petiole, to 26 mm. + blade oblanceolate 8-12-20 mm. × 2-4-5.5 mm. wide, short hairy and glandular (especially visible at high magnification), margin entire, tip acute, some withered at flowering time, cauline, ±sessile, reduced or not well-developed above, but up to 32 mm. × 1.8 mm. wide; Peduncle, spreading to descending multicellular hairs with clear crosswalls, slightly pustular (maybe) or glandular at high magnification; Phyllaries, in 2+ ±equal series, but not distinctly imbricate, 3-4.5 mm. × 0.7 mm. wide, lanceolate, green center, light margins, spreading hairy; Receptacle epaleate; Flowers, 2 kinds; Ray flowers, cypsela 0.5 mm. + tube 2 mm. + ligule 4 mm. × 0.3-0.6 mm. wide = 6.5-7 mm. × 0.8 mm. wide, fertile, tip rounded, white & pink fading purple; Disk flowers, yellow; Pappus, ray and disk alike, inner, few capillary bristles, 4 mm., outer, short crown of scales, double pappus not particularly disgnostic in Erigeron. The most common form of E. tracyi is perhaps (speculative) a stabilized, apomictic hybrid between E. flagellaris and E. divergens (FNANM). Described from Coll. No. 1133, 9 Jun 2015 and Coll. No. 1337, 11 May 2016.
- Heritage Dells, South Gulch, 6118. 6/1/2026. 6140. 6/1/2026. .
- North Table Mountain Open Space (City of Golden), Signed as Jefferson County Open Space, parcel owned by City of Golden. Lower south slopes of North Table Mountain, 100 m. east of the end of Peery Parkway, 1.2 km. north northeast of the GNIS location of Golden. Tom Schweich 1337. 11 May 2016. ( CAS JCOS s.n. KHD00063981‡ UCR278798‡ ) .
- Parfet Prehistoric Preserve, 4038. 5/12/2025. .
- Schweich Hill, South side of hill, near the informal “bench.” Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1612. 15 May 2017. ( CDA0050100‡ COLO02347862‡ KHD00065379‡ ) .
- South Table Mountain Open Space (City of Golden), 6067. 5/13/2026. .
- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2203. 6/12/2021. .
- Tripp Ranch Meadow Open Space, 2765. 6/10/2022. .
- Tucker Gulch (lower),
Tom Schweich 2904.
7/6/2022.
.
.
Gaillardia aristata Pursh. Blanketflower. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 40 cm.; Leaves, alternate, entire to toothed; Inflorescence, single heads on peduncles 13-18 cm., flowers of 2 kinds; Phyllaries, 2+ series, 17 mm. × 2.7 mm. wide, lance-linear; Receptacle, epaleate, setae, to 10 mm.; Rays, sterile, corolla, 21 mm. × 10 mm. wide, yellow, deeply 3-lobed; Disk flowers, corolla, 7 mm., purple; Pappus of 6+ aristate scales, 4 mm., awn 2×> body. Described from Coll. No. 1205, 12 Jul 2015.
- Coors Tech Wetland Open Space, 5992. 5/11/2026. .
- Deadman Gulch, East-facing grassy slope. Deadman Gulch is often referred to by the locally euphemistic name of “Kinney Run.” High plains between US Hwy 6 and Lookout Mountain, about 150 m. northwest of the Deadman Gulch undercrossing of US Hwy 6, 2.3 km. south of the GNIS location of Golden. Tom Schweich 1425. 15 Jun 2016. ( CS202293‡ UCR278002‡ ) .
- Parfet Open Space (City of Golden), 4156. 6/1/2025. .
- North Hogback Open Space (City of Golden), Foothills shrubland, mostly Cercocarpus montanus; also collected here: Hypericum perforatum; nearby: Campanula rotundifolia, and Muhlenbergia montana. Hogback at the northern city limits of Golden, nearly to the top of the west slopes. 4.40 km. north northwest of the GNIS location of Golden. Tom Schweich 2356. 12 Jun 2020. ( UC ) .
- Schweich Hill,
Top of hill, center of parcel.
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden.
Tom Schweich 1665.
16 Jun 2017.
(
KHD00065494‡
OBI124848‡
)
.
.
 Gaillardia aristata on Dakota Ridge. |
 Coll. No. 1665, Gaillardia aristata |
 Flowerhead of Coll. No. 1454, Gaillardia aristata |
Grindelia inornata Greene. Colorado Gumweed. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Open Space (City of Golden),
With Ericameria nauseosa var. graveolens and Bromus inermis.
This parcel was designated a City of Golden Open Space in 2025.
In a small gulch below Parfet Estates Drive, general topography is probably original but area disturbed by water line installation, 1.01 km. southwest of the GNIS location of Golden.
Tom Schweich 3521.
11 Sep 2025.
(
KHD
)
.
.
 Coll. No. 3521, Grindelia inornata. |
 Leaves of Coll. No. 3521, Grindelia inornata. |
 Coll. No. 3521, Grindelia inornata. |
Grindelia squarrosa (Pursh) Dunal. Curlycup Gumweed. CalPhotos. Jepson eFlora. SEINet Taxon.
- Grampsas North Open Space (City of Golden), 3909. 12/7/2024. .
- Kinney Run South, 3965. 1/3/2025. .
- Parfet Open Space (City of Golden), 4174. 6/1/2025. .
- Magic Mountain Archeological Site, 4349. 7/30/2025. .
- North Hogback Open Space (City of Golden), Foothills grassland, below any significant concentration of shrubs, also collected here: Rhus trilobata, Tragia ramosa, Eriogonum alatum, and Gutierrezia sarothrae. Northwesternmost city limits of Golden, west side of Dakota Ridge (North Hogback), about 1/2 of the way up the west slope from Cressmans Gulch, 2.66 km. north northwest of the GNIS location of Golden. Tom Schweich 2399. 29 Jul 2020. ( CS198700‡ EIU ) .
- Parfet Prehistoric Preserve, 4000. 4/30/2025. .
- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2204. 6/12/2021. .
- Tripp Ranch Meadow Open Space,
2787.
6/10/2022.
.
.
 Obs. No. 4391, Grindelia squarrosa. |
 Obs. No. 4391, Grindelia squarrosa. |
 Obs. No. 4391, Grindelia squarrosa. |
 Grindelia squarrosa in my garden. |
Grindelia subalpina Greene. Subalpine Gumweed. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, 45-60 cm.; Stem, light brown, glabrous; Leaves, cauline, alternate, sessile, blade 45 mm. × 12 mm. wide, reduced distally, oblanceolate, adaxially glandular, margins, dentate, teeth separated 3-5 mm., apiculate; Inflorescence, heads, #3-4 per stem, not overtopped by leaves, showy, gummy exudate; Involucre, 10 mm. × 13 mm. wide, globose, resinous; Phyllaries, in 5± unequal graduated series, lower << rest of involucre, upper 8 mm. × 1.3 mm. wide, resinous, margins, flat, tips, acuminate, lower coiled 360°; Pappus, few, well developed bristles, 3.5 mm, readily falling; Style, 2-branched, stigmatic portion 0.6 mm. + appendages 0.6 mm.; Cypsela, 1.6 mm. × 0.6 mm. wide, black, glabrous. (Described from Coll. No. 3530, 18 September 2025.)
- Parfet Open Space (City of Golden), iNaturalist Observation 313216472. 4396. 9/11/2025. 4400. 9/11/2025. .
- Heritage Dells, North Gulch, 4612. 4/23/2026. .
- Heritage Dells, South Gulch, 6158. 6/1/2026. .
- Kinney Run, Foothills shrubland, also collected here: Astragalus shortianus, Cynoglossum officinale, Lithospermum arvense, Scutellaria brittonii, and Toxicoscordion paniculatum. Near the junction of Deadman Gulch with Kinney Run, on a small hill that is a highly eroded hogback continued from the east side of Kinney Run, 2.37 km. south of the GNIS location of Golden. Tom Schweich 2410. 31 Jul 2020. ( CDA0053773‡ COLO2433894‡ OBI186043‡ UCR297632‡ ) .
- North Hogback Open Space (City of Golden), 4525. 4/11/2026. .
- North Table Mountain Open Space (City of Golden), Also seen or collected here: Heterotheca villosa, Symphyotrichum porteri, Lupinus argenteus, Monarda fistulosa, Bromus inermis, and B. japonicus. Along a social trail towards the north end of the City of Golden North Table Mountain Open Space, in a hummocky area that is probably an ancient landslide, 3.0 km. north of the GNIS location of Golden Tom Schweich 3530. 18 Sep 2025. ( KHD ) .
- South Table Mountain Open Space (City of Golden),
6029.
5/13/2026.
.
.
 Obs. No. 4396, Grindelia subalpina. |
 Obs. No. 4392, Grindelia subalpina in DeLong Park. |
 Coll. No. 3530, Grindelia subalpina. |
Gutierrezia sarothrae (Pursh) Britton & Rusby. (Syn: G. linearifolia Lag. ) Broom Snakeweed. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial, tap-rooted, to 9 cm.; Leaves, alternate, linear, 20 mm. × 1 mm. mm. wide, dotted with embedded oil glands, very few short hairs; Peduncle, 0.5-1.5 mm.; Inflorescence, some flowers with strap-shaped corollas, flowers of two kinds in same heads, Involucre, 3.5 mm. × 2.5-3.0 mm. wide, obconic, not gummy; Phyllary, 2-3 unequal series, inner folded around ovary of ray flowers, dotted with embedded oil glands, tips appressed; Receptacle, epaleate; Rays, #5, yellow; Disk, #4; Pappus, a well-developed crown of scales on both ray and disk flowers; (Described from Coll. No. 144, 3 Oct 1997: keys easily to Gutierrezia sarothrae. However, inner phyllaries are folded around ovary of ray flowers, a character not mentioned in keys or description.)
- Kinney Run South, 3971. 1/3/2025. 4472. 4/9/2026. .
- Parfet Open Space (City of Golden), 4124. 6/1/2025. With Artemisia ludoviciana, Symphyotrichum ericoides, and Opuntia polyacantha. Designated as a City of Golden Open Space in 2025. Upper slope, southwest part of open space, 1.11 km. southwest of the GNIS location of Golden. Tom Schweich 3522. 11 Sep 2025. ( FLD ) .
- South Illinois Open Space, 3943. 12/20/2024. .
- Kinney Run, Tom Schweich 1640. 7/6/2018. .
- Magic Mountain Archeological Site, 4347. 7/30/2025. .
- North Hogback Open Space (City of Golden), Tom Schweich 1713. 6/14/2019. Foothills grassland, below any significant concentration of shrubs, also collected here: Rhus trilobata, Tragia ramosa, Eriogonum alatum, and Grindelia squarrosa. Northwesternmost city limits of Golden, west side of Dakota Ridge (North Hogback), about 1/2 of the way up the west slope from Cressmans Gulch, 2.66 km. north northwest of the GNIS location of Golden. Tom Schweich 2400. 29 Jul 2020. ( CAS1087035‡ CDA0053768‡ UCR297629‡ ) .
- North Table Mountain Open Space (City of Golden), Low shrubs and grasses, with: Achillea millefolium, Grindelia subalpina, Heterotheca villosa, Liatris punctata, Solidago rigida var. humilis, Bromus inermis and B. japonicus. This collection is from an old shrub, but there aren't many shrubs here. This area was designated a City of Golden open space in 2025. On an old road that formerly went to the top of the mesa, in an area of hummocky terrain that is probably an ancient landslide, 2.37 km. (geodesic) north of the GNIS location of Golden. Tom Schweich 3537. 18 Sep 2025. ( OBI ) .
- Parfet Prehistoric Preserve, 4017. 4/30/2025. .
- Schweich Hill, Determination tentative. Tom Schweich 1531. 3/27/2017. Eastern half of parcel, east slope at edge of smooth brome infestation. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1751. 31 Aug 2017. ( CDA0052330‡ KHD00065156‡ ) .
- South Table Mountain Open Space (City of Golden), 6038. 5/13/2026. .
- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2205. 6/12/2021. .
- Tripp Ranch Meadow Open Space,
2756.
6/10/2022.
.
.
Helianthus annuus L. Common Sunflower. CalPhotos. Jepson eFlora. SEINet Taxon.
- Grant Terry Open Space, iNaturalist Observation 129986252. kay_hellmann 5938. 8/7/2022. .
- Magic Mountain Archeological Site, 4355. 7/30/2025. . .
Helianthus pumilus Nutt. Little Sunflower. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 40 cm.; Leaves, cauline, alternate, occasionally opposite, then bases conjoined, simple, petiole 7-10 mm. + blade 55-86 mm. × 22-30 mm. wide, lanceolate, flat (not folded), margin, entire to lightly toothed, adaxial, pustular strigose, hairs multicellular, crosswalls clear, abaxial, glandular and strigose; Inflorescence, heads single to few on leafy stems, peduncles to 8-10 cm., hairy, glandular; Involucre, 9 mm. × 16 mm. wide; Phyllaries in 2+ series, similar, 6-10 mm. × 2.0-3.5(4) mm. wide, greene erect, ovate, strigose abaxially, margins ciliate, tip acuminate, not as “stiff” or “tough” as those of Coll. No. 1199; Receptacle, slightly convex, paleate; Disk, 17 mm. wide; Palea, 9 mm., tip, glandular, hairy distally; Flowers, 2 kinds; Ray flowers, sterile, #10-12, corolla, 17-25 mm. × (4)6-9 mm. wide, yellow; Disk flowers, corolla, 4-6 mm., yellow, lobes, #5, 1 mm., yellow, anther appendages reddish-brown; Pappus of few long (2.5-4 mm.) aristate scales; Cypsela, 3.5 mm. × 1.4 mm. wide, quadrangular,not laterally compressed black. Described from Coll. No. 1210, 1426, and 1704.
- Deadman Gulch, Northeast-facing grassy slope. High plains between US Hwy 6 and Lookout Mountain, about 145 m. northwest of the Deadman Gulch undercrossing of US Hwy 6, 2.3 km. south of the GNIS location of Golden. Tom Schweich 1426. 15 Jun 2016. ( CS EIU OBI83310‡ ) .
- Grampsas North Open Space (City of Golden), 3912. 12/7/2024. .
- Parfet Open Space (City of Golden), 4162. 6/1/2025. .
- Heritage Dells, North Gulch, 4622. 4/23/2026. .
- Heritage Dells, South Gulch, 6123. 6/1/2026. .
- Magic Mountain Archeological Site, 4346. 7/30/2025. .
- North Hogback Open Space (City of Golden), Tom Schweich 1720. 6/14/2019. Also collected here: Bromus japonicus, and Nassella viridula, and nearby: Hypericum perforatum, Potentilla recta, and Muhlenbergia montana. Hogback at the northern city limits of Golden, 3/4 of the way up the west-facing slope, at the lower edge of Cercocarpus montanus, 4.41 km. north northwest of the GNIS location of Golden. Tom Schweich 2354. 12 Jun 2020. ( CDA0053752‡ OBI149319‡ REGIS ) .
- Parfet Prehistoric Preserve, 3998. 4/30/2025. .
- Schweich Hill, Determination tentative Tom Schweich 1508. 3/27/2017. East-facing slope near center of parcel. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1704. 14 Jul 2017. ( CAS CDA0052323‡ KHD00065458‡ ) Tom Schweich 3043. 5/21/2023. .
- South Table Mountain Open Space (City of Golden), 6027. 5/13/2026. .
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2282. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 Tom Schweich, with Ann Norton 2206. 6/12/2021. .
- Tripp Ranch Meadow Open Space, 2751. 6/10/2022. Tom Schweich 3567. 6/8/2024. .
- Welch Ditch (Open Space),
4700.
4/25/2026.
.
.
 Coll. No. 1704, Helianthus pumilus |
 Coll. No. 1426, Helianthus pumilis |
Heliomeris multiflora Nutt. var. multiflora. Showy Golden Eye. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 45 cm.; Stem, proximally glabrate to strigose distally; Leaves, cauline, opposite to few alternate distally, petiole, 3 mm., blade 52 mm. × 13 mm. wide, reduced distally, rhombo-lanceolate, strigose, margins, mostly entire, larger leaves barely serrulate; Inflorescence, heads, 4-10 per stem, showy, not overtopped by leaves; Peduncles, indistinct; Involucre, 5.5 mm. × 10 mm. wide, hemispheric; Phyllaries, in 2-3 ±equal series, 5.5 mm. × 1.5 mm. wide, green, veins, #3, prominent adaxially, margins, flat, tips, acute; Receptacle, paleate; Palea, 5 mm. × 0.9 mm. wide; Perianth, 2 or more whorls; Ray flowers, many, tube, 1.2 mm. + blade 7 mm. × 2.8 mm. wide, yellow, sterile; Disk flowers, many, tube 2.5 mm. + lobes 0.5 mm., yellow, bisexual; Pappus, absent; Cypsela, 1.5 mm. × 0.6 mm. wide, obconic, glabrous, light brown, beakless. Described from Coll. No. 3531 & 3533, 18 September 2025.
- North Table Mountain Open Space (City of Golden),
Also seen or collected nearby: Ericameria nauseosa vars. graveolens and nauseosa, Symphyotrichum ericoides, Symphoricarpos sp., Calochortus gunnisonii, and Nassella viridula.
Same as Coll. No. 3533.
Along a social trail towards the north end of the North Table Mountain Open Space, in a flat area that is probably the head of an ancient landslide, 2.5 km. north of the GNIS location of Golden.
Tom Schweich 3531.
18 Sep 2025.
(
COLO
)
Also seen or collected nearby: Artemisia ludoviciana, Ericameria nauseosa vars. graveolens and nauseosa, Gutierrezia sarothrae, Liatris punctata, Turritis glabra, Toxicoscordiom paniculatum, and Bromus inermis.
Same as Coll. No. 3531.
Along a social trail towards the north end of the North Table Mountain Open Space, in a hummocky area that is probably an ancient landslide, 2.42 km. north of the GNIS location of Golden
Tom Schweich 3533.
18 Sep 2025.
(
KHD
)
.
.
 Coll. No. 3533, Heliomeris multiflora var. multiflora. |
 Coll. No. 3533, Heliomeris multiflora var. multiflora. |
 Coll. No. 3533, Heliomeris multiflora var. multiflora. |
Heterotheca villosa (Pursh) Shinners. (Syn: H. v. (Pursh) Shinners var. nana (A. Gray) Semple , H. v. (Pursh) Shinners var. villosa ) Hairy False Goldenaster. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 50 cm.; Leaves, cauline alternate, entire, 1-veined, distal perpendicular to stems, hairs > glands; Heads solitary, with both ray and disk flowers; Phyllaries in 2+ series, unequal, to 7 mm.; Rays, 9 mm.; Pappus double, outer narrow scales ≤ 1 mm. (easier to see on mature fruit), inner bristles, 6.5 mm., white; Fruit, disk 3 mm., hairy.
- Cottonwood Natural Area, 3953. 12/27/2024. .
- Grampsas North Open Space (City of Golden), 4283. 7/25/2025. .
- Kinney Run South, 4471. 4/9/2026. .
- Parfet Open Space (City of Golden), 4163. 6/1/2025. .
- Heritage Dells, North Gulch, 4614. 4/23/2026. .
- Heritage Dells, South Gulch, 6112. 6/1/2026. .
- Kinney Run, Var. minor if infraspecific names are to be applied. West slope of the hogback on the east side of Kinney Run, between the Cambria Lime Kiln and Tripp Ranch, 3.20 km. south southeast of the GNIS location of Golden. Tom Schweich 1967. 6 Jul 2018. ( COLO02348571‡ KHD00068682‡ OBI UC ) .
- Magic Mountain Archeological Site, 4360. 7/30/2025. .
- North Hogback Open Space (City of Golden), Open herbaceous vegetation, ponderosa pines and mountain mahogany shrubland nearby. Also collected here: Koeleria macrantha, Hesperostipa comata, and Eriogonum umbellatum var. umbellatum. Hogback at the northern city limits of Golden, dry and more or less flat area on top of ridge, 4.38 km. north northwest of the GNIS location of Golden. Tom Schweich 2358. 12 Jun 2020. ( COLO2434165‡ REGIS ) .
- North Table Mountain Open Space (City of Golden), Low shrubs, forbs, and grasses, with Grindelia subalpina, Lupinus argenteus var. argenteus, Monarda fistulosa, Carex inops var. heliophila, and Bromus japonicus. Designated a City of Golden Open Space in 2025. Southwest slope of North Table Mountain, northern part of the open space, along a social trail, in an area of hummocky ground suggesting an ancient landslide, 2.34 km. north of the GNIS location of Golden. Tom Schweich 3426. 23 Jun 2025. ( UCR ) .
- Parfet Prehistoric Preserve, 4032. 4/30/2025. .
- Schweich Hill, Tom Schweich 1513. 3/27/2017. Top of hill, center of parcel. Somewhat ambiguous as to var. minor vs. var. nana. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1664. 16 Jun 2017. ( CDA0050017‡ EIU KHD00065487‡ ) .
- South Table Mountain Open Space (City of Golden), 6028. 5/13/2026. .
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2283. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 Tom Schweich, with Ann Norton 2207. 6/12/2021. .
- Tripp Ranch Meadow Open Space, 2777. 6/10/2022. .
- Tucker Gulch (lower), Common within the city limits of Golden, along the creek of Tucker Gulch and the Tucker Gulch Trail, about 250 m. north of the First Street Bridge, and 350 m. south southwest of Ford Street. Tom Schweich 1055. 10 Aug 2014. ( CAS UC2045980‡ UCR266872‡ ) .
- Welch Ditch (Open Space),
4701.
4/25/2026.
.
.
Hymenopappus filifolius Hook. var. polycephalus (Osterh.) B.L. Turner. Many-Headed Fine-Leaved Wooly-White. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 60 cm., ±tomentose throughout; Leaves, basal, petiole 35 mm. + blade 75-105 mm. × 30-50 mm. wide, oblanceolate in shape, base conspicuously tomentose, bipinnately dissected to filiform segments, ultimate leaf divisions (8)12-19 mm., cauline, similar, reduced above, #(4)5-8; Inflorescence, heads borne singly on peduncles, 22-45 mm.; Heads, (5)7-16 per stem; Involucre, 8 mm. × 15 mm. wide; Phyllaries, 1-2 series (vague what is a series and what not), 6-7 mm. × 2.5-4.0 mm. wide, inner > outer, green, tomentose, margins chartaceous, tips broad; Receptacle, epaleate, flat; Flowers, 1 kind; Disk flowers, corollas, 3.5 mm., yellow; Pappus, crown of scales, 0.8-1.2 mm.; Cypsela, 3-5 mm., hairy all over, more so on the angles. (Described from Coll. No. 1427, 15 June 2016, and Coll. No. 1504, 13 July 2016.)
- Deadman Gulch, East-facing grassy slope. Deadman Gulch is often referred to by the locally euphemistic name of “Kinney Run.” High plains between US Hwy 6 and Lookout Mountain, about 145 m. northwest of the Deadman Gulch undercrossing of US Hwy 6, 2.3 km. south of the GNIS location of Golden. Tom Schweich 1427. 15 Jun 2016. ( KHD00063989‡ UC UCR278000‡ ) .
- Parfet Open Space (City of Golden), 4165. 6/1/2025. .
- Kinney Run, Tom Schweich 1631. 7/6/2018. .
- North Hogback Open Space (City of Golden), Tom Schweich 1717. 6/14/2019. .
- Schweich Hill, In a slightly more exposed area on the south side of the hill where there are fewer non-natives and less disturbance. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1663. 16 Jun 2017. ( CDA50018‡ KHD00065488‡ ) .
- Tripp Ranch Meadow Open Space,
2766.
6/10/2022.
.
.
Lactuca serriola L. Prickly Lettuce. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual herb, Stems erect, Leaves basal 0 at flowering, cauline coarsely lobed, margins prickly-toothed, Fruit beak slender, many-ribbed, ~8 adaxial, ~5 abaxial (Described from Collection No. 911, 4 Oct 2012).
- Grampsas North Open Space (City of Golden), 4294. 7/25/2025. .
- Parfet Open Space (City of Golden), 4123. 6/1/2025. .
- Heritage Dells, South Gulch, 6125. 6/1/2026. .
- Schweich Hill, Determination tentative Tom Schweich 1500. 3/27/2017. Large, against neighbor's fence, maybe getting watered with neighbor's landscaping. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1749. 31 Aug 2017. ( CDA0052329‡ JCOS s.n. KHD00065360‡ ) .
- Stonebridge Homeowners Association,
Tom Schweich, with Ann Norton 2208.
6/12/2021.
.
.
 Coll. No. 1749, Lactuca serriola |
 Coll. No. 3478, Lactuca serriola. |
Liatris punctata Hook. Dotted Blazing Star. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 32 cm.; Leaves, cauline, alternate, 78 mm. × 3.5 mm. wide, gradually reduced above, linear, glandular punctate, margins, entire, revolute, sparsely hairy; Inflorescence, single heads in axils on short pedicels; Involucre, 16 mm. × 7 mm. wide, ±cylindrical; Phyllaries, in 2+ series, inbricate, 14 mm. × 3.8 mm. wide, glandular-punctate abaxially distally, margin, ciliate, scarious, tip acute; Receptacle, epaleate; Flowers, one kind; Disk flowers; Corolla, tube white 8 mm. + lobes purple 2.5 mm.; Pappus, bristles, one series, 10 mm., plumose; Cypsela, 7 mm., hairy. Described from Coll. No. 1264, 29 Jul 2015.
- Grampsas North Open Space (City of Golden), 3920. 12/7/2024. .
- Parfet Open Space (City of Golden), 4367. 8/15/2025. Dry, gravelly north-facing slope, with Rhus trilobata, Symphyotrichum ericoides, Linum sp., Cercocarpus montanus, Yucca glauca, and Bromus inermis. This parcel was designated a City of Golden Open Space in 2025. Central part of the open space, in a less-disturbed area, just above the Welch Ditch and in between various trees and shrubs, 1.02 km. southwest of the GNIS location of Golden. Tom Schweich 3516. 11 Sep 2025. ( OBI ) .
- Grant Terry Open Space, LOWER MONTANE, ALONG ROADSIDE. Donor: Herbarium, University of Colorado, Denver Center JUNCTION OF #6 AND #58, W OF GOLDEN. 13N 0479810E 4400337N. L Harvill 14. 20 Sep 1977. ( KHD40960‡ ) .
- Magic Mountain Archeological Site, 4343. 7/30/2025. .
- North Hogback Open Space (City of Golden), Foothills grassland with a few Rhus trilobata. Cercocarpus montanus higher up the slope. Also collected here: Cerastium arvense, Scutellaria brittonii, Castilleja integra, and Alyssum simplex. Northwesternmost city limits of Golden, west side of Dakota Ridge (North Hogback), about half way up the slope above Cressmans Gulch, 2.60 km. north northwest of the GNIS location of Golden. Tom Schweich 2405. 29 Jul 2020. ( CDA0053770‡ ) .
- North Table Mountain Open Space (City of Golden), 4407. 9/18/2025. .
- Schweich Hill, Tom Schweich 1524. 3/27/2017. Northeast section, in deep grasses (mostly smooth brome) and other weeds. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1747. 31 Aug 2017. ( CAS1095214‡ KHD00065355‡ ) .
- Stonebridge Homeowners Association,
Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2284.
7/24/2020.
Sovell, John R., and Susan S. Panjabi, 2021
.
.
 Coll. No. 1736, Liatris punctata |
 Coll. No. 3195, Liatris punctata. |
 Inflorescence of Coll. No. 1264, Liatris punctata |
 Coll. No. 1264, Liatris punctata |
Nothocalais cuspidata (Pursh) Greene. Prairie False Dandelion. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Hogback Open Space (City of Golden), About ¼ up the west limb, sparsely vegetated soil; with Rhus trilobata, Yucca glauca, Linum lewisii, Eriogonum alatum, Poa sp., and Euphorbia esula. Lower western slope of hogback in northernmost Golden, 4.2 km. north northwest of the GNIS location of Golden. Tom Schweich 2759. 26 Apr 2022. ( CS ) .
- Schweich Hill,
top of hill
Tom Schweich, with Cathy Hansen-Stamp 3011.
4/27/2023.
.
.
 Nothocalais cuspidata on the Nightbird Gulch Trail |
 Coll. No. 1791, Nothocalais cuspidata |
Onopordum acanthium L. Scotch Cottonthistle. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space, 5983. 5/11/2026. .
- Cottonwood Natural Area, 3956. 12/27/2024. .
- Grampsas North Open Space (City of Golden), 4306. 7/25/2025. .
- North Hogback Open Space (City of Golden), Tom Schweich 1700. 6/14/2019. .
- Parfet Prehistoric Preserve, 4014. 4/30/2025. .
- Stonebridge Homeowners Association,
Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2285.
7/24/2020.
Sovell, John R., and Susan S. Panjabi, 2021
.
.
 Coll. No. 2772, Onopordum acanthium |
Packera fendleri (A. Gray) W.A. Weber & Á. Löve. (Syn: Senecio fendleri A. Gray ) Fendler’s Ragwort. CalPhotos. Jepson eFlora. SEINet Taxon.
- Deadman Gulch, Northeast-facing slope, more open stoney ground, on what appears to be a southeast to northwest trend approximating the trend of Eagle Ridge to the southeast. Above the watercourse locally named “Kinney Run,” between US Highway 6 and Eagle Ridge Drive, 110 m. northwest of Kinney Run Trail, 3.17 km. south of the GNIS location of Golden. Tom Schweich 2044. 2 Jun 2019. ( COLO2434769‡ KHD00071096‡ OBI ‡ UCR ) .
- Schweich Hill,
Near social trail just west of the top of hill. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden.
Tom Schweich 1817.
12 May 2018.
(
KHD00068678‡
)
Tom Schweich 1838.
5/12/2020.
budding
Tom Schweich 3552.
4/30/2024.
.
.
Packera tridenticulata (Rydb.) W.A. Weber & Á. Löve. (Syn: Senecio tridenticulatus Rydb. ) (=Packera thurberi (A. Gray) B. L. Turner) Three-Tooth Ragwort. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial, to 25 cm., densely tomentose below, thinning above; Leaves, mostly basal, petiole 40 mm. + blade 24 mm. × 7 mm. wide, sparsely shallowly toothed, few cauline, tomentose in the axils, petiole 20 mm. + blade 24 mm. × 4 mm. wide, sparsely shallowly toothed, a few are 3-lobed at tip; Inflorescence, corymbiform, heads #12±, flowers of 2 kinds; Involucre, 6 mm. × 11 mm. wide, bowl-shaped; Phyllaries, 1 series (with little overlap), 4 mm. × 1.2 mm. wide, mostly green, 2+ veins, 1 margin chartaceous; Receptacle, epaleate; Rays, #11±, fertile, tube 2.5 mm. + blade 5.5 mm. × 2 mm. wide, yellow; Disc flowers, yellow; Pappus, capillary bristles, 4.5 mm.; Cypsela, 2.5 mm., glabrous. Described from Coll. No. 1643, 30 May 2017.
- Schweich Hill,
Top of hill, among most intact area of native vegetation.
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden.
Tom Schweich 1643.
30 May 2017.
(
CS
KHD00065490‡
)
.
.
 Inflorescence of Coll. No. 1643, Packera tridenticulata |
 Coll. No. 1643, Packera tridenticulata |
Pseudognaphalium canescens (DC.) Anderberg. (Syn: P. canescens (DC.) W. A. Weber [illeg.] ) Wright's Rabbit-Tobacco. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial, to 25 cm.; Leaves, alternate, petiole 16 mm. + blade 30 mm. × 10 mm. wide, tomentose (slightly less so adaxially), sessile glandular beneath the tomentum; Inflorescence, terminal and axial on leafy stems; Phyllaries, 3 series, 3.7 mm. × 1 mm. wide, green center, mostly scarious, innermost glabrous; Receptacle, epaleate, flat; Flowers, 2 kinds (heads disciform); Rays, small, inconspicuous, sterile; Disk flowers, corolla, 2 mm., yellow; Pappus, capillary bristles, >corollas. (Described from Coll. No. 1549, 1 Sep 2016.)
- North Hogback Open Space (City of Golden),
Top of ridge, east side.
Tom Schweich 1739.
6/14/2019.
Sedimentary rock outcrops and foothills shrubland, also collected nearby: Linaria canadensis var. texana, Physaria montana, and Viola nuttallii.
Northwesternmost city limits of Golden, west side of Dakota Ridge (North Hogback), base of rock outcrop at top of ridge, 2.65 km. north northwest of the GNIS location of Golden.
Tom Schweich 2403.
29 Jul 2020.
(
COLO2433837‡
OBI149099‡
)
.
.
 Coll. No. 1549, Pseudognaphalium canescens |
 Coll. No. 1549, Pseudognaphalium canescens |
Ratibida columnifera (Nutt.) Woot. & Standl. (Syn: Rudbeckia columnifera Nutt. ) Upright Prairie Coneflower. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 50 cm., tap-rooted; Leaves, cauline, to 11 cm. × 3 cm. wide, 1-pinnate, pinnae to 39 mm. × 4 mm. wide, some toothed; Inflorescence, single heads per stem, >> leaves; Involucre, 14 mm. diameter; Phyllaries, 1 series, lanceolate, hairy abaxially; Receptacle, cylindric, paleate; Rays, #5, 17 mm., × 13 mm. wide, elliptic-ovate, sterile, corolla yellow; Disk, cylindric, 20-45 mm. × 9-12 mm. wide; Palea, folded around but not enclosing disk flowers; Disk flowers, many, corolla greenish-yellow; Pappus, short crown of scales; Fruit, compressed, but maybe not strongly, ciliate adaxially(!). Described from Coll. No. 1198, 12 July 2015.
- Eagle Ridge, On mesa slope in foothills. Notes: Transferred from USGS Herbarium, Denver, CO (2005). Colorado, Jefferson, Foothills of the Front Range, Junction of US 6 and road to Morrison, about 1 mile east of Golden. Handsford T. Shacklette 5876. 27 Jun 1959. ( COLO00857987‡ ) .
- Grampsas North Open Space (City of Golden), 4290. 7/25/2025. .
- Grant Terry Open Space, Roadside. Junction of Hwy 6 and Hwy 58, west of Golden, CO. 13N 0479779E 4400334N. Janet L. Wingate 62. 17 Jul 1978. ( KHD444‡ ) .
- Kinney Run, West slope of the hogback on the east side of Kinney Run, between the Cambria Lime Kiln and Tripp Ranch, 3.19 km. south southeast of the GNIS location of Golden. Tom Schweich 1966. 6 Jul 2018. ( COLO02348597‡ KHD00068677‡ OBI UC ) .
- North Hogback Open Space (City of Golden), 4271. 7/20/2025. .
- North Table Mountain Open Space (City of Golden), 4210. 6/23/2025. .
- Schweich Hill, Southeast corner of parcel, between social trails. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1702. 14 Jul 2017. ( CAS1103016‡ CDA0052322‡ KHD00065461‡ ) .
- Stonebridge Homeowners Association,
Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2286.
7/24/2020.
Sovell, John R., and Susan S. Panjabi, 2021
.
.
 Coll. No. 1198, Ratibida columnifera |
 Coll. No. 1496, Ratibida columnifera |
Scorzonera laciniata L. (Syn: Podospermum laciniatum (L.) De Candolle ) Cutleaf Vipergrass. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 40 cm., Leaves, basal and cauline, 7-20 cm., pinnately dissected into near-linear lobes, reduced but still well-developed above; Inflorescence, few heads on long stems; Phyllaries, in ±3 series, graduated, 4-13 mm. × 1.5-9 mm. wide, margins chartaceous, tips dark; Receptacle, epaleate; Flowers, ligulate (1 kind, 5-lobed), corolla yellow; Pappus of plumose bristles, Introduced, Europe (Old French: viper) (Described from Coll. No. 1399, 8 June 2016).
- Coors Tech Wetland Open Space, 5979. 5/11/2026. .
- Parfet Open Space (City of Golden), 4120. 6/1/2025. .
- North Table Mountain Open Space (City of Golden), Disturbed trailside with grasses and Tragopogon dubius. Southwest side of North Table Mountain, along City of Golden North Table Mountain Trail, 2.2 km. north of the GNIS location of Golden. Tom Schweich 1399. 8 Jun 2016. ( JCOS s.n. KHD00063987‡ ) .
- Parfet Prehistoric Preserve, 4010. 4/30/2025. .
- Schweich Hill, Tom Schweich 1527. 3/27/2017. Western section of parcel, which has possibly been revegetated after adjacent home construction. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1623. 15 May 2017. ( CDA0050094‡ KHD00065498‡ ) .
- Stonebridge Homeowners Association,
Tom Schweich, with Ann Norton 2209.
6/12/2021.
.
.
 Schweich collection of Scorzonera laciniata |
Senecio L. Ragwort. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space, 5981. 5/11/2026. . .
Senecio integerrimus Nutt. Columbia Ragwort. CalPhotos. Jepson eFlora. SEINet Taxon.
- Eagle Ridge, Tom Schweich 3038. 5/9/2023. Tom Schweich 3173. 5/28/2023. .
- North Table Mountain Open Space (City of Golden), With Artemisia dracunculus, A. ludoviciana, Alysum simplex, Lupinus argenteus, Prunus virginiana and Verbascum thapsus. This parcel was designated a City of Golden Open Space in 2025. Variety exaltatus if infraspecific names are to be applied. Along City of Golden North Table Mountain Trail in the northern part of the open space, very windy northwest slope, 2.35 km. north of the GNIS location of Golden. Tom Schweich 3386. 16 May 2025. ( CAS FLD ) .
- Parfet Prehistoric Preserve, 4070. 5/12/2025. .
- Schweich Hill, Just a few plants on the eastern slope, in dense smooth brome. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.73 km. north northeast of the GNIS location of Golden. Tom Schweich 1847. 18 May 2018. ( KHD00068675‡ ) .
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2287. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 Tom Schweich, with Ann Norton 2210. 6/12/2021. .
- Tripp Ranch Meadow Open Space,
2743.
6/10/2022.
a couple of dense patches, competing with Canada thistle.
Tom Schweich 3569.
6/8/2024.
.
.
Senecio riddellii (Torr. & A. Gray) Greenm. ex L.O. Williams. Riddell's Ragwort. CalPhotos. Jepson eFlora. SEINet Taxon.
- Magic Mountain Archeological Site, open gnd ca 2 1/2 mi S of Golden. T R70W S10. Ernest H. Brunquist 41. 24 Aug 1959. ( CS23861‡ ) . .
Senecio spartioides Torr. & A. Gray. (Syn: S. multicapitatus Greenm. ex Rydb. ) Broomlike Ragwort. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 50 cm.; Leaves, basal, unknown, cauline, alternate, 90 mm. × 3 mm. wide, narrowly oblanceolate, reduced above to 30 mm. × 1 mm. wide, variously hairy in axils and ±lower surface; Involucre, 12.5 mm. × 6 mm., narrowly campanulate, bractlets not prominent; Phyllaries, 2 series? or 1 series with 2 forms? outer, 7.5 mm. × 0.7 mm. wide, all green, inner, 7.5 mm. × 1.3 mm. wide, centrally green with margins chartaceous, all tips dark; Receptacle, epaleate; Rays, fertile, corolla, tube 5 mm. + blade 9 mm. × 2 mm. wide, yellow, lobes 3; Disk flowers, corolla, 6 mm., yellow; Pappus, 1 series of fine capillary bristles, 5 mm.; Cypsela, 4 mm., 5-angled, dark gray, “hirtellous” throughout (not just the angles). Described from Coll. No. 1298, 23 Sep 2015.
- Parfet Open Space (City of Golden), 4166. 6/1/2025. .
- Schweich Hill,
Near top of hill, in some of the least-disturbed native vegetation.
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden.
Tom Schweich 1755.
31 Aug 2017.
(
CAS
CDA0052331‡
KHD00065160‡
)
Remnant mixed-grass prairie, also collected nearby: Hymenopappus filifolius, Oxytropis lambertii, Eriogonum effusum and Carex inops var. heliophila.
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 2.31 km. north northwest of the GNIS location of Golden. Near top of hill, central part of the parcel.
Tom Schweich 2231.
12 Sep 2019.
(
COLO2433589‡
CS
EIU
REGIS
)
.
.
Senecio wootonii Greene. Wooton's Ragwort. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Table Mountain Open Space (City of Golden), Golden, Foothills north of Golden, CO. 13N 0481338E 4401747N. Helen Marsh Zeiner 5610. 24 May 1919. ( KHD4279‡ ) . .
Solidago L. Goldenrod. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Open Space (City of Golden), 4244. 7/16/2025. .
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2288. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 . .
Solidago gigantea Aiton. Giant Goldenrod. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, 60 cm. (growing on a steep stream bank); Stem, glabrous, becoming hairy in the inflorescence; Leaves, basal unknown, cauline, alternate, petiole, 5 mm. or subsessile, blade, 90 mm. × 15 mm. wide, distally reduced in size but abundant, lanceolate-elliptic, entire, ciliate with small curved hairs, distally widely-spaced serrate; Inflorescence, pyramidal, paniculate, ±secund; Peduncles, 3-5 mm.; Involucre, 3 mm. × 4 mm. wide, spheric(?), lightly glandular; Phyllaries, unequal, 2+ series, lower <rest of involucre, green to chartaceous, margins flat; Receptacle, very short scales(?), definitely not flat; Flowers, of 2 kinds; Rays, #11, tube 2 mm. + blade 1.5 mm. × 0.3 mm. wide, yellow, fertile; Disk flowers, #7 tube 2.8 mm. + lobes 0.9 mm., throat expanding gradually, yellow, open, bisexual; Pappus, bristles, 2.8 mm., equal; Stamens, not tailed; Style, 2-branched, ±brushlike appendages; Stigma, 0.5 mm., >style appendages (0.4 mm.); Fruit, 1 mm., hairy, beak-less (Described from Coll. No. 2422, 17 Aug 2020).
- Deadman Gulch,
Inflorescence full of little crab spiders colored the same yellow as the corollas.
In Deadman Gulch (Kinney Run) between US Highway 6 and Eagle Ridge Drive, on the edge of the perennial creek, around the retention pond, and further upstream along the creek, 3.17 km. south of the GNIS location of Golden.
Tom Schweich 2422.
17 Aug 2020.
(
COLO2434025‡
KHD00073443‡
OBI186036‡
UCR297679‡
)
.
.
 Coll. No. 2422, Solidago gigantea |
 Coll. No. 2227, Solidago gigantea |
Solidago missouriensis Nutt. Missouri Goldenrod. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 35-40 cm., generally glabrous throughout; Leaves, basal, unknown, cauline, alternate, petiole 10-45 cm. + blade 100 mm. × 21-22 mm. wide, reduced above, oblanceolate, margin, sparsely scabrous proximally, serrate distally, glabrous, prominently 3(5)-nerved; Inflorescence, crowded panicle; Pedicels, 1 mm.; Bracts, #2, 1.8 mm.; Involucre, 3.0-4.5 mm. × 3-5 mm. wide, obconic; Phyllaries, 2+ series, 2.2-3.5 mm. × 1 mm. wide, graduated, green, margin chartaceous, veins 1; Receptacle, epaleate, conic; Flowers, 2 kinds; Rays, #12, fertile, tube 2 mm. + blade 2.2 mm., yellow; Disk flower, #12, tube 2.8 mm. + lobes 0.7 mm. = 3.5 mm., yellow; Pappus, capillary bristles, 3.0 mm.; Cypsela, 0.4-0.6 mm., glabrous-sparsely hairy. Described from Coll. No. 1255, 26 Jul 2015, and Coll. No. 1519, 29 Jul 2016. Distinguished in part by its glabrous characters and presence of 3 prominent nerves on leaves. Jepson eFlora notes that S. missouriensis Nutt. Is misapplied to S. spectabilis (D. C. Eaton) A. Gray. FNANM states that, in the west, it can be similar to smaller plants of S. spectabilis (13 Sep 2014).
- Kinney Run, West slope of the hogback on the east side of Kinney Run, between the Cambria Lime Kiln and Tripp Ranch, 3.12 km. south southeast of the GNIS location of Golden. Tom Schweich 1969. 6 Jul 2018. ( COLO02348555‡ KHD00068671‡ OBI ) .
- Magic Mountain Archeological Site, det. tent. 4359. 7/30/2025. .
- North Hogback Open Space (City of Golden), 4270. 7/20/2025. With an Opuntia (non-native), Euphorbia esula, Pediomelum tenuiflorum, Rumex crispus, and Bromus inermis. This parcel designated the North Golden Hogback Open Space in July 2025. On the lowest stream terrace of a dry wash (Cressman Gulch) that runs along the southwest side of the open space, 3.30 km. northwest of the GNIS location of Golden. Tom Schweich 3455. 20 Jul 2025. ( CAS FLD OBI UCR ) .
- Schweich Hill,
Eastern half of parcel, east slope at edge of smooth brome infestation.
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden.
Tom Schweich 1752.
31 Aug 2017.
(
CS198634‡
KHD00065157‡
)
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.73 km. north northeast of the GNIS location of Golden. Along the north fence.
Tom Schweich 2196.
11 Aug 2019.
(
CAS1108855‡
REGIS s.n. Error 14.6(b)-7c
UC
UCR297560 Error 14.6(b)-7a
)
.
.
Solidago nana Nutt. Baby Goldenrod. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 40 cm., short white hairy throughout; Leaves, basal, withered (late in season), cauline, alternate, 95 mm. × 9-10 mm. wide (includes 15 mm. winged petiole? below) veins, 1 (others discontinuous), margin hairs similar to surface hairs, i.e., not ciliate, gradually reduced and sessile above; Inflorescence, heads numerous and small, involucre, 5.5 mm.; Phyllaries, 3-4 series, imbricate, graduated, 3-4 mm., veins 1; Receptacle, epaleate, (scales? to 0.5 mm.); Flowers of 2 kinds; Rays, few (3-4), fertile? (stigma visible but cypsela not as developed as those of disk flowers), corolla, 6 mm., yellow; Disk flowers, few (6-8), corolla, 4 mm., yellow; Pappus, capillary bristles; Cypsela, 1.5 mm., short hairy. Described from Coll. No. 1292, 9 Sep 2015.
- Eagle Ridge, Ponderosa pines and foothills shrubland, mostly Cercocarpus montanus. At the north end of “Eagle Ridge,” an informally named hogback between US Highway 6 and Eagle Ridge Drive, under the powerline tower, 3.36 km. south southeast of the GNIS location of Golden. Tom Schweich 2439. 28 Aug 2020. ( COLO2434090‡ KHD00073462‡ OBI183253‡ UC ) .
- Schweich Hill,
On a bank that was formerly cut, unknown whether it was intentionally regevetated or not.
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden.
Tom Schweich 1759.
31 Aug 2017.
(
KHD00065164‡
UCR ‡
)
.
[
Similar to Coll. No. 1752.
]
.
 Coll. No. 1292, Solidago nana |
 Coll. No. 1759, Solidago nana |
 Coll. No. 2439, Solidago nana. |
Solidago rigida L. var. humilis Porter. Stiff Goldenrod. CalPhotos. Jepson eFlora. SEINet Taxon.
Herbaceous perennial, to 70 cm., apparently reproducing in part by offsets (“caudices branching”), short spreading hairy throughout; Leaves, basal and cauline, basal, #3-8, petiole, 15 cm., blade, 12.5 cm. × 6 cm. wide, ovate, entire, withered at flowering, cauline, alternate, sessile, 60 mm. × 27 mm. wide, ovate, entire, reduced above; Inflorescence, cymose, heads borne singly on short pedicels; Phyllaries, 2+ series, graduated, largest, 4.5 mm. × 1.3 mm. wide, tip obtuse, veins 3, ciliate distally; Receptacle, convex, epaleate; Flowers of 2 kinds; Rays, fertile, corolla, 5.5 mm. × 0.8 mm. wide, yellow; Disk flowers, corolla, 5 mm., yellow; Pappus, bristles, 1 series; Cypsela, 1 mm., glabrous. Described from Coll. No. 1280, 28 August 2015.
- North Table Mountain Open Space (City of Golden),
Low shrubs and grasses, with: Achillea millefolium, Grindelia subalpina, Gutierrezia sarothrae, Heterotheca villosa, Liatris punctata, Bromus inermis and B. japonicus.
This area was designated a City of Golden open space in 2025.
On an old road that formerly went to the top of the mesa, in an area of hummocky terrain that is probably an ancient landslide, 2.3 km. (geodesic) north of the GNIS location of Golden.
Tom Schweich 3536.
18 Sep 2025.
(
KHD
)
.
[
This appears to be the first collection from Golden.
]
.
Sonchus asper (L.) Hill. Spiny Sowthistle. CalPhotos. Jepson eFlora. SEINet Taxon.
- Kinney Run,
Moist soil.
Steep bank of Kinney Run, just north of Tripp Ranch, 2.61 km. south of the GNIS location Golden.
Tom Schweich 2414.
31 Jul 2020.
(
COLO2433944‡
KHD00079305‡
)
.
.
 Coll. No. 3399, Sonchus asper. |
 Voucher of my Coll. No. 2414 Sonchus asper at COLO. |
Symphyotrichum ericoides (Linnaeus) G. L. Nesom. (Syn: Virgulus ericoides (Linnaeus) Reveal & Keener ) White Heath Aster. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial, woody at base, stems ascending, to 40 cm., spreading vegetatively, short hairy and minutely glandular throughout; Leaves, alternate, sessile, narrowly lanceolate or oblong, 7-9 mm. × 1.5 mm. wide, entire, strigose, tip, small white spine; Heads, borne singly along stem, secund, occasionally 2 per stem, on leafy pedicels; Flowers, of 2 kinds; Involucre, 4 mm. × 5 mm. wide, bell-shaped; Phyllaries, 2+ series, 3-4 mm. × 0.7-0.8 mm. wide, white below with 1 brown or green vein, rhomboid green above, tip with very small spine; Receptacle, epaleate; Rays, corolla, white, tube 2 mm + ligule 5.0-6.5 mm., fertile; Disc flowers, corolla, yellow, tube 3.5 mm. + lobes 0.5 mm., (some?) lobes reddish; Pappus, bristles, fine, barbelate, 4 mm.; Cypsela, 1 mm. (Described from Coll. No. 1558, 3 September 2016 and Coll. No. 1743.5, 23 August 2017).
- Grampsas North Open Space (City of Golden), 4307. 7/25/2025. Also here: Ambrosia psilostachya, Brickellia eupatorioides, Ericameria nauseosa var. graveolens, Potentilla recta, and Bromus inermis. This area was designated a City of Golden open space in 2025. Northern portion of the Tony Grampsas Memorial Sports Complex, lowest northeast slope of small alluvial hill, southeast side of North Table Mountain, 4.10 km. (geodesic) northeast of the GNIS location of Golden. Tom Schweich 3527. 15 Sep 2025. ( CAS ) .
- Parfet Open Space (City of Golden), Dry, gravelly north-facing slope, with Linum sp., Cercocarpus montanus, Rhus trilobata, Yucca glauca, and Bromus inermis. This parcel was designated a City of Golden Open Space in 2025. Central part of the open space, in a less-disturbed area, just above the Welch Ditch and in between various trees and shrubs, 1.02 km. southwest of the GNIS location of Golden. Tom Schweich 3515. 11 Sep 2025. ( KHD ) .
- North Table Mountain Open Space (City of Golden), 4406. 9/18/2025. With Heliomeris multiflora var. multiflora, Symphoricarpos sp., Monarda fistulosa, Pediomelum tenuiflorum, Calochortus gunnisonii, and Nassella viridula. This area was designated a City of Golden Open Space in 2025. Along a social trail towards the north end of the North Table Mountain Open Space, in a flat area that is probably the head of an ancient landslide, 2.52 km. (geodesic) north of the GNIS location of Golden. Tom Schweich 3532. 18 Sep 2025. ( OBI ) .
- Schweich Hill,
Half-dozen plants in an area formerly mowed by neighbors.
Tom Schweich, with Cathy Hansen-Stamp and Barry Stamp 2456.
9/25/2021.
.
.
 Coll. No. 3515, Symphyotrichum ericoides. |
 Secund head of Coll. No. 3527, Symphyotrichum ericoides. |
 Coll. No. 3198, Symphyotrichum ericoides. |
 Coll. No. 1743.5, Symphyotrichum ericoides |
Symphyotrichum falcatum (Lindl.) G.L. Nesom. (Syn: Aster falcatus Lindl. ) White Prairie Aster. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 40 cm., scabrous throughout; Leaves, basal, unknown, cauline, alternate, sessile, 32 mm. × 2.7 mm. wide, linear-oblanceolate, entire, tip spinulose, gradually reduced above; Inflorescence, extended panicle; Involucre, 5 mm. × 4.5 mm. wide; Phyllaries, in 4 graduated series, 3-5 mm. × 0.8 mm. wide, chartaceous below, green above, elliptical, tip spinulose except innermost; Receptacle, epaleate; Flowers of 2 kinds, Rays, pistillate, corolla, tube 2.5 mm. + laminae 5 mm. × 1.3 mm, white spatulate; Disk flowers, corolla, 4 mm., some rose to purple, some yellow; Pappus, capillary bristles, 4.5 mm.; Cypsela, 1 mm., hairy. Described from Coll. No. 1300, 23 Sep 2015.
- Schweich Hill,
See also my Coll. No. 1760.
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue. Mid-slope in southwestern section, probably not in the revegetated zone.
Tom Schweich 1712.
14 Jul 2017.
(
REGIS
)
South-central portion of parcel, but still above the most disturbed areas.
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden.
Tom Schweich 1760.
31 Aug 2017.
(
EIU029816‡
KHD00065165‡
OBI
)
.
.
 Coll. No. 1300, Symphyotrichum falcatum |
 Inflorescence of Coll. No. 1300, Symphyotrichum falcatum |
Symphyotrichum fendleri (A. Gray) G. L. Nesom. Fendler's Aster. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 25 cm., caudex unknown; Stem, strigose; Leaves, cauline, alternate, sessile, blade 28 mm. × 2 mm. wide, reduced distally, linear to linear-oblanceolate, entire, margins regularly-spaced ciliate, tips white-spinulose; Inflorescence, 6± heads per stem; Involucre, 5 mm. × 7 mm. wide, bell-shaped; Phyllaries, unequal, 3± series, 4-5 mm. × 1.2 mm. wide, base indurate, diamond-shaped green distally, stipitate-glandular, margins flat, tips acuminate; Receptacle, epaleate; Flowers, of 2 kinds; Rays, #15±, tube 6 mm. + blade 6-7 mm. × 1.3 mm. wide, blue; Disk flowers, many, 4 mm., yellow; Pappus, many well-developed bristles, 4.5 mm., brown to light tan ("cinnamon to sordid" in FNANM); Cypsela, 1 mm. × 0.5 mm. wide, light brown. The FNANM term "strigoso-hispid" may apply more accurately to stem and leaf margin hairs. (Described from Collection No. 3517, 11 September 2025.)
- Parfet Open Space (City of Golden),
Dry, gravelly north-facing slope, with Rhus trilobata, Liatris punctata, Symphyotrichum ericoides, Linum sp., Cercocarpus montanus, Yucca glauca, and Bromus inermis.
This parcel was designated a City of Golden Open Space in 2025.
Central part of the open space, in a less-disturbed area, just above the Welch Ditch and in between various trees and shrubs, 1.02 km. southwest of the GNIS location of Golden.
Tom Schweich 3517.
11 Sep 2025.
(
FLD
KHD
OBI
)
.
.
 Coll. No. 3517, Symphyotrichum fendleri. |
Symphyotrichum lanceolatum (Willd.) G. L. Nesom ssp. hesperium (A. Gray) G. L. Nesom. (Syn: Aster lanceolatus Willd. ssp. hesperius (A. Gray) Semple & J. Chmielewski ) Western Lance-Leaved Aster. CalPhotos. Jepson eFlora. SEINet Taxon.
- Deadman Gulch, Riparian, also seen or collected nearby: Clematis ligusticifolia, Mirabilis nyctaginea, Crataegus succulenta, and Epilobium hirsutum. On the edge of the streambed in Deadman Gulch (Kinney Run), above US Highway 6 and just below Eagle Ridge Drive, 3.43 km. south of the GNIS location of Golden. Tom Schweich 2441. 28 Aug 2020. ( COLO2434108‡ KHD00073469‡ OBI186038‡ ) .
- Magic Mountain Archeological Site,
open field
ca 2 1/2 mi S of Golden. T R70W S10.
Ernest H. Brunquist 55.
21 Sep 1959.
(
CS37494‡
)
.
.
 Coll. No. 724, Symphyotrichum lanceolatum var. hesperium |
Symphyotrichum porteri (A. Gray) G.L. Nesom. (Syn: Aster porteri A. Gray ) Smooth White Aster. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 35 cm., eglandular, generally not hairy; Stem ascending; Leaves, cauline, alternate, sessile, 53 mm. × 3 mm. wide, lance-linear, many rolled, tip pointed, maybe spinulose, generally glabrous except some distal margins; Inflorescence, crowded, ±flat-topped; Heads borne simgly on short pedicels; Involucre, 5 mm. × 8 mm. wide; Phyllaries, 2+series, 3.5 mm. × 0.7 mm. wide, ±equal, inner ≥ outer, mid-vein green, margins white proximally, green distally, tip acute; Receptacle, epaleate, convex (if not conic); Flowers of two kinds; Rays, fertile, corolla, 6.5 mm., white; Disk flowers, corolla, 3.0 mm., yellow; Pappus, bristles, barbed, single, 2.5 mm.; Cypsela, 0.7 mm., sparsely hairy. Described from Coll. No. 1266, 29 Jul 2015.
- Magic Mountain Archeological Site, open ground ca 2 1/2 mi S of Golden. T R70W S10. Ernest H. Brunquist 37. 22 Aug 1959. ( CS23922‡ ) .
- North Table Mountain Open Space (City of Golden), 4408. 9/18/2025. With Liatris punctata, Solidago rigida var. humilis, Symphyotrichum ericoides, Monarda fistulosa, and Carex inops ssp. heliophila. This area was designated a City of Golden open space in 2025. Beside the City of Golden North Table Mountain Trail, in an area of hummocky terrain that is probably an ancient landslide, 2.33 km. (geodesic) north of the GNIS location of Golden. Tom Schweich 3538. 18 Sep 2025. ( CS ) .
- Schweich Hill, Also collected nearby: Cryptantha virgata, Lithospermum incisum, Penstemon secundiflorus, and Poa secunda. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 2.31 km. north northwest of the GNIS location of Golden. Near top of hill, north central part of the parcel. Tom Schweich 2230. 12 Sep 2019. ( CDA0052316‡ COLO2433597‡ CS KHD00074457‡ ) .
- Stonebridge Homeowners Association,
Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2289.
7/24/2020.
Sovell, John R., and Susan S. Panjabi, 2021
.
.
Tanacetum parthenium (L.) Sch.Bip. Feverfew. CalPhotos. Jepson eFlora. SEINet Taxon.
- Tucker Gulch (lower),
In an opening between trees lining the south side of the creek: Populus deltoides ssp. monilifera, Acer negundo, and Ulmus pumilus.
EDDMapS Record ID 13517275.
Right bank of Tucker Gulch in Norman D. Park, just upstream of North Ford Street,1.92 km. north northwest of the GNIS location of Golden.
Tom Schweich 3445.
7 Jul 2025.
(
COLO
CS
JCOS s.n.
KHD
)
.
.
 Coll. No. 3445, Tanacetum parthenium. |
 Coll. No. 3445, Tanacetum parthenium. |
Taraxacum officinale F. H. Wigg. (Syn: T. laevigatum (Willd.) DC. ) Common Dandelion. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space, 5973. 5/11/2026. .
- Parfet Open Space (City of Golden), 4138. 6/1/2025. .
- Heritage Dells, North Gulch, 4629. 4/23/2026. .
- Kinney Run, Thirty meters east of and above the Kinney Run Trail, in thin soil near bare rock outcrops of a small hogback, 3.16 km. south of the GNIS location of Golden. Tom Schweich 1781. 12 Apr 2018. ( CDA0052338‡ COLO02348035‡ EIU029810‡ ) .
- Magic Mountain Archeological Site, Tom Schweich 1644. 4/18/2018. .
- North Table Mountain Open Space (City of Golden), Flat area beside the trail. On the City of Golden North Table Mountain trail, just below the southwest rim of North Table Mountain, 1.9 km north of the GNIS location of Golden. Tom Schweich 1317. 22 Apr 2016. ( CAS JCOS s.n. KHD00063971‡ OBI83179‡ ) .
- Parfet Prehistoric Preserve, 4005. 4/30/2025. .
- Schweich Hill, Tom Schweich 1506. 3/27/2017. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue. 2.3 km. northwest of GNIS location of Golden. Top of hill, sunny slope south of social trail. Tom Schweich 2013. 16 Apr 2019. ( CS KHD00072410‡ REGIS ) .
- Welch Ditch (Open Space),
4681.
4/25/2026.
.
.
Thelesperma megapotamicum (Spreng.) Kuntze. Hopi Tea Greenthread. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 55 cm., woody at base, glabrous, eglandular; Leaves, opposite, pinnately lobed, lobes filiform, 30-35 mm.; Inflorescence, 1-3 heads per stem on 10 cm. peduncles; Phyllaries, 2 dimorphic series, without bristles or spines, outer, 2 mm. × 1.3 mm. wide, spreading, inner, 8 mm. × 3 mm. wide, connate 4.7 mm, tips erect; Receptacle, paleate, flat; Paleae, 7 mm. × 2 mm. wide, mid-vein greenish-brown, otherwise chartaceous; Flowers of 1 kind; Disc flowers, corolla, tube 3 mm. + throat 1 mm. + lobes 2 mm., color yellow with red-brown veins; Pappus, 2 retrorsely barbed awns; Cypsela, 3.8 mm. (Described from Coll. No. 1483, 6 Jul 2016.)
- Cressmans Gulch, Tom Schweich 1947. 6/12/2020. .
- Grampsas North Open Space (City of Golden), 4280. 7/25/2025. .
- North Hogback Open Space (City of Golden), With Artemisia frigida, Lupinus argenteus, and Pediomelum tenuiflorum. This parcel designated the North Golden Hogback Open Space in July 2025. On an upper stream terrace of a dry wash (Cressman Gulch) that runs along the southwest side of the open space, 3.35 km. northwest of the GNIS location of Golden. Tom Schweich 3457. 20 Jul 2025. ( CAS FLD UCR ) .
- Schweich Hill,
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue. Center of parcel, top of hill.
Tom Schweich 1707.
14 Jul 2017.
(
CDA0052324‡
KHD00065588‡
)
.
.
 Tea made from Thelesperma megapotamicum |
 Coll. No. 1707, Thelesperma megapotamicum |
 Coll. No. 1483, Thelesperma megapotamicum |
Townsendia exscapa (Richards.) Porter. Stemless Townsend Daisy. CalPhotos. Jepson eFlora. SEINet Taxon.
- Magic Mountain,
USA, Colorado, Jefferson, About 150 yards Northeast of archeological dog, Peabody Museum (Harvard). On summit of slight rise. Summit of slight rise. No shade. Soil reddish, stony, apparently not very fertile.
Ernest H. Brunquist 79.
17 Apr 1960.
(
KHD17780‡
)
.
.
 Townsendia exscapa at Fort Union. |
Townsendia grandiflora Nutt. Largeflower Townsend Daisy. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 15 cm.; Stem, villous; Leaves, opposite below, alternate above, 32-43 mm. × 3 mm. wide, narrowly oblanceolate, long ciliate at base; Inflorescence, heads borne singly; Involucre, 12 mm. × 25 mm. wide; Phyllaries, 5+ imbricate series, 13 mm. × 2.5-3.0 mm. wide, ±equal, ovate, margin ciliate, tip acuminate, green around prominent mid-vein, chartaceous margins; Receptacle, flat, epaleate, very short bristles; Flowers of two kinds; Rays, sterile, pappus, scales, 0.6 mm., corolla, 14-21 mm. × 1.2-1.5 mm. wide, white with purple center; Disk, 14-21 mm. wide, pappus, bristles, 4.0 mm., corolla, 4.5-5.0 mm., yellow; cypsela, 4 mm. × 1.3 mm., laterally compressed (Described from Coll. No. 1247, 24 Jul 2015, and Coll. No. 1404, 8 June 2016).
- Eagle Ridge, On mesa slope in foothills. Notes: Transferred from USGS Herbarium, Denver, CO (2005). United States, Colorado, Jefferson, Foothills of the Front Range, Junction of US 6 and road to Morrison, about 1 mile east of Golden. Handsford T. Shacklette 5887. 27 Jun 1959. ( COLO528556‡ ) .
- Parfet Open Space (City of Golden), 4168. 6/1/2025. .
- South Table Mountain Open Space (City of Golden),
outside of a switchback in Lubahn Trail
Tom Schweich 3329.
7/7/2023.
.
.
Townsendia hookeri Beaman. Hooker's Townsend Daisy. CalPhotos. Jepson eFlora. SEINet Taxon.
Low growing perennial, from a woody caudex, acaulescent, to 2.5 cm.; Leaves, linear to narrowly oblanceolate, 30 mm. × 1.2 mm. wide, appressed hairy or strigose, eglandular; Peduncle, 3 mm., spreading hairy, eglandular; Heads, solitary, sessile (or apparently so), 12 mm. × disc (10)15-20 mm. wide; Phyllaries in 3+ overlapping series, 8 mm. × 1.2 mm. wide, all same length but inner phyllaries attached higher on receptacle giving impression of inner > outer, green, margin scarious and ciliate, outer hairy, tipped by a tuft of tangled cilia, inner, margins and tip ciliate, but not tangled; Receptacle epaleate, flat; Ray flowers, #25-30, fertile (pistillate), cypsela 3.3 mm., tuft of glandular hairs at base, pappus of 1 series white bristles, 4-5 mm., corolla, 10-11 mm., white to lavender; Disc flowers, bisexual, cypsela, 3.7 mm., glandular hairy, pappus 1 series white bristles, 4-6 mm., corolla, 3.8-4.5 mm., yellow, lobes dark. (Described from Coll. No. 1087, 25 Apr 2015, and Coll. No. 1304, 9 April 2016) The disc pappus sometimes being longer than the ray pappus could lead one to T. incana in Ackerfield (2015). Perhaps caulescence would be a better character, as used by Weber & Wittmann (2012).
- Deadman Gulch,
The type locality of T. hookeri is Mount Vernon Canyon, about 5 km. south. Also collected here: Packera plattensis, Euphorbia brachycera, and Ipomopsis spicata.
High plains at the base of the Rocky Mountain Front Range, linear northwest trending dry gravelly area, either in a trace of the Golden Fault or adjacent to it, 3.15 km. south of the GNIS location of Golden.
Tom Schweich 2251.
27 Apr 2020.
(
OBI186054‡
)
.
.
Tragopogon dubius Scop. (Syn: Tragopogon dubius Scop. ssp. major (Jacq.) Vollman ) Yellow Salsify. CalPhotos. Jepson eFlora. SEINet Taxon.
Peduncle inflated distally, flowers yellow, phyllaries in 1 overlapping series, ligules 3-5 mm. shorter than phyllaries.
- Coors Tech Wetland Open Space, 5977. 5/11/2026. .
- Parfet Open Space (City of Golden), 4098. 6/1/2025. .
- North Hogback Open Space (City of Golden), Tom Schweich 1703. 6/14/2019. .
- Parfet Prehistoric Preserve, 4006. 4/30/2025. .
- Schweich Hill, Common, scattered throughout parcel; these from top of hill. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1616. 15 May 2017. ( CDA0050099‡ COLO02347912‡ CS KHD00065381‡ ) .
- South Table Mountain Open Space (City of Golden), 6033. 5/13/2026. .
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2290. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 Tom Schweich, with Ann Norton 2211. 6/12/2021. .
- Tripp Ranch Meadow Open Space, 2774. 6/10/2022. .
- Welch Ditch (Open Space),
4709.
4/25/2026.
.
.
 Coll. No. 1115, Tragopogon dubius |
Xanthisma spinulosum (Pursh) D. R. Morgan & R. L. Hartm. (Syn: Machaeranthera pinnatifida (Hook.) Shinners ) Spiny Goldenweed. CalPhotos. Jepson eFlora. SEINet Taxon.
- Eagle Ridge, Foothills grassland below shrubland, with Artemisia dracunculus, Ericameria nauseosa var. nauseosa, Helianthus pumilis, Bromus inermis, and a Poa. Northeast limb of “Eagle Ridge,” an informal name for a hogback between US Highway 6 and Eagle Ridge Drive, 3.66 km. south southeast of the GNIS location of Golden. Tom Schweich 2438. 28 Aug 2020. ( CAS COLO2434082‡ UCR ) .
- Parfet Open Space (City of Golden), In short grasses with Artemisia campestris, Grindelia subalpina, Mentzelia nuda, and Mirabilis linearis; Hybanthus verticillatus previously found nearby but not seen on this date. This parcel was designated a City of Golden Open Space in 2025. Top of the ridge in the northeast part of the Open Space, appears to be pre-development topography, 950 m. southwest of the GNIS location of Golden. Tom Schweich 3520. 11 Sep 2025. ( CS ) .
- Schweich Hill,
Found just south of the main social trail and at the base of the original (pre-fill) slope on the east side of the hill.
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden.
Tom Schweich, with Cathy Hansen-Stamp and Barry Stamp 2756.
25 Sep 2021.
(
KHD00075406‡
)
.
 Coll. No. 2438, Xanthisma spinulosum |
 Coll. No. 2434, Xanthisma spinulosum |
 Detail of Coll. No. 2434, Xanthisma spinulosum |
Berberidaceae
Berberis . Barberry. CalPhotos. Jepson eFlora. SEINet Taxon.
- South Table Mountain Open Space (City of Golden), 6047. 5/13/2026. . .
Berberis aquifolium Pursh. Holly-leaf Oregon-Grape. CalPhotos. Jepson eFlora. SEINet Taxon.
- Cressmans Gulch, 4561. 4/15/2026. .
- Welch Ditch (Open Space), 4738. 4/25/2026. . .
Berberis repens Lindl. (Syn: Mahonia repens (Lindl.) G. Don ) Creeping Barberry. CalPhotos. Jepson eFlora. SEINet Taxon.
- Kinney Run South, 3979. 1/3/2025. .
- Kinney Run, Thirty-eight meters east of and above the Kinney Run Trail, west side of the hogback in a small cove or old excavation that collects water, 3.12 km. south of the GNIS location of Golden. Tom Schweich 1782. 12 Apr 2018. ( COLO02348027‡ EIU029811‡ KHD00068925‡ OBI162799‡ ) .
- Stonebridge Homeowners Association,
Tom Schweich 3249.
6/13/2023.
.
 Coll. No. 1309, Berberis repens |
 Habitat of Coll. No. 1782, Berberis repens. |
 Coll. No. 1309, Berberis repens |
Betulaceae
Betula occidentalis Hook. (Syn: Betula fontinalis Sarg. ) Water Birch. CalPhotos. Jepson eFlora. SEINet Taxon.
- Grant Terry Open Space,
iNaturalist Observation 113873346.
jack_i 5951.
4/30/2022.
iNaturalist Observation 306844961.
maryadams 5952.
8/16/2025.
iNaturalist Observation 345821884.
suzanne11 5953.
3/28/2026.
flood plain of Clear Creek above US Highway 6.
Tom Schweich 2027.
4/8/2021.
.
 Water Birch (Betula occidentalis) along Clear Creek. |
 Coll. No. 3435, Betula occidentalis. |
 Coll. No. 2644, Betula occidentalis. |
Boraginaceae
Asperugo procumbens L. German Madwort. CalPhotos. Jepson eFlora. SEINet Taxon.
- Cressmans Gulch, 4544. 4/15/2026. Acer nedgundo, Galium aparine Tom Schweich 3556. 15 Apr 2026. ( Undist. ) .
- Tucker Gulch (lower), Also collected nearby: Lithospermum arvense, Alliaria petiolata, Lunaria annua, Veronica biloba, and Fumaria vaillantii. At the south end of a bridge over the gulch, on a bank above creek, extending from the edge of the concrete trail nearly down to the creek. Along the City of Golden Tucker Gulch Trail, about mid-way between 1st Street and 7th Place, 1.36 km. north northwest of the GNIS location of Golden. Tom Schweich, with Cindy Trujillo 2483. 27 May 2021. ( COLO2706091‡ KHD00075600‡ OBI185096‡ ) . .
Cryptantha Lehm. ex G. Don. Cryptantha. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Hogback Open Space (City of Golden),
Tom Schweich 2472.1
25 May 2021.
(
Golden
)
.
.
 Collection No. 535, Cryptantha, at Wimmer Flat on San Rafael Swell, Utah |
 Coll. No. 535, Cryptantha |
Cynoglossum officinale L. Gypsyflower. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon.
- Kinney Run South, 3978. 1/3/2025. .
- Heritage Dells, North Gulch, 4610. 4/23/2026. .
- Heritage Dells, South Gulch, 4497. 4/9/2026. .
- Kinney Run, Plants in vegetative state only, determination tentative. Tom Schweich 1595. 4/12/2018. Tom Schweich 1628. 7/6/2018. Small colony, along with Lithospermum arvense and Euphorbia peplus. Colorado Noxious Weed List B. Southeast slope of a small hill between Kinney Run and Deadman Gulch, near the junction of those two small streams, 2.89 km. south of the GNIS location of Golden. Tom Schweich 1827.1 16 May 2018. ( CAS COLO02347508‡ KHD00069160‡ UC ) .
- Magic Mountain Archeological Site, Tom Schweich 1658. 4/18/2018. .
- Parfet Prehistoric Preserve, 4039. 5/12/2025. .
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2291. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 Tom Schweich, with Ann Norton 2212. 6/12/2021. .
- Tripp Ranch Meadow Open Space, 2745. 6/10/2022. .
- Welch Ditch, Also collected here: Scrophularia lanceolata, Bromus tectorum, and Dactylis glomerata. Popular rock-climbing area with heavy daily use. Colorado Noxious Weed List B. Along the former Welch Ditch, in shade inside the ditch, south side of Clear Creek, just inside the mouth of Clear Creek Canyon, 2.73 km. west southwest of the GNIS location of Golden. Tom Schweich 2307. 3 Jun 2020. ( CDA0053742‡ UCR ) .
- Welch Ditch (Open Space),
4685.
4/25/2026.
4736.
4/25/2026.
.
.
Ellisia nyctelea (L.) L. Aunt Lucy. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Prehistoric Preserve,
?
4002.
4/30/2025.
.
.
 Coll. No. 2486.1, Ellisia nyctelea |
 Coll. No. 1391, Ellisia nyctelea |
Hydrophyllum fendleri (A. Gray) A. Heller var. fendleri. Fendler's Waterleaf. CalPhotos. Jepson eFlora. SEINet Taxon.
- Heritage Dells, North Gulch, 4640. 4/23/2026. .
- Kinney Run, 4439. 3/30/2026. .
- North Table Mountain Open Space (City of Golden), Moist shady west-facing ravine. Southwest side of North Table Mountain, along City of Golden North Table Mountain Trail, 2.5 km. north of the GNIS location of Golden. Tom Schweich 1396. 8 Jun 2016. ( CAS JCOS s.n. KHD00063832‡ UC UCR277984‡ ) .
- Tripp Ranch Meadow Open Space, Tom Schweich 3570. 6/8/2024. . .
Lappula occidentalis (S. Watson) Greene. (Syn: L. occidentalis (S. Watson) Greene var. occidentalis , L. redowskii (Hornem.) Greene , L. redowskii (Hornem.) Greene var. redowskii ) Flatspine Stickseed. CalPhotos. Jepson eFlora. SEINet Taxon.
- Kinney Run, Tom Schweich 1845. 5/15/2020. .
- North Hogback Open Space (City of Golden), Tom Schweich 1721. 6/14/2019. .
- Tucker Gulch (lower), Tom Schweich 1839. 5/12/2020. . .
Lithospermum arvense L. (Syn: Buglossoides arvensis (L.) I. M. Johnst. ) Corn Gromwell. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual, to 30 cm., hairs appressed with pustular bases; Stem, some branched distally; Leaves, basal and cauline, basal, petiole 5 mm. + blade 13 mm. × 3.5 mm. wide, slightly obovate, margin entire, hairs as above, withering, cauline, alternate, sessile, 19 mm. × 3.7 mm. wide, margin entire, hairs as above; Calyx, lobes, 5.2 mm. × 0.7 mm. wide, enlarged in fruit to 7 mm., hairs as above; Corolla, tube 4 mm. + throat 1 mm. + lobes 1.5 mm., blue to white, abaxial spreading hairy; Stamens, attached in tube; Style, 1.2 mm., Nutlets, #(1-2) 3 (4), 2.8 mm. × 2 mm. wide, green - tan, tuberculed (Described from Coll. No. 1783 and Coll. No. 1827).
- Cressmans Gulch, Alyssum simplex Tom Schweich 3558. 15 Apr 2026. ( Undist. ) .
- Kinney Run, Tom Schweich 1594. 4/12/2018. Distributed with 1827. 2.89 km. south of the GNIS location of Golden. Tom Schweich 1783. 12 Apr 2018. ( Golden ) The small plants are my collection no. 1783, made 12 April 2018, from the same population. Southeast slope of a small hill between Kinney Run and Deadman Gulch, near the junction of those two small streams, 2.89 km. south of the GNIS location of Golden. Tom Schweich 1827. 16 May 2018. ( CDA0052349‡ COLO02348670‡ JCOS s.n. KHD00069154‡ UCR ‡ ) Tom Schweich, with Bob Lagier 2089. 5/8/2021. .
- North Hogback Open Space (City of Golden), Also collected here: Poa pratensis, Secale cereale, Linum lewisii, and Lupinus argenteus. Northwesternmost Golden, between Pine Ridge Road and Dakota Ridge, on a terrace above Cressmans Gulch, 4.50 km. north northwest of the GNIS location of Golden. Tom Schweich 2351.1 12 Jun 2020. ( Golden ) Weedy place above the channel of Cressman Gulch, with non-natives Medicago sativa, Euphorbia esula, Verbascum thapsus, Bromus inermis, and natives Linum lewisii, Lupinus argenteus, and Pediomelum tenuiflorum. Northwest corner of Golden, strath above Cressmans Gulch, 115 m. downstream from Pine Ridge Road, 4.46 km. northwest of the GNIS location of Golden. Tom Schweich 2473. 25 May 2021. ( OBI185088‡ ) .
- Tucker Gulch (lower),
Scattered in grasses under trees, also collected here: Asperugo procumbens, Alliaria petiolata, Lunaria annua, and Veronica biloba.
Along the City of Golden Tucker Gulch Trail between 1st Street and 7th Place, 1.45 km. north northwest of the GNIS location of Golden.
Tom Schweich 2478.
27 May 2021.
(
Golden
)
.
.
 Habitat of Coll. No. 1788, Lithospermum arvense. |
 Habitat of Lithospermum arvense in Kinney Run. |
 Habitat of Coll. No. 1827, Lithospermum arvense |
 Coll. No. 1788, Lithospermum arvense |
Lithospermum incisum Lehm. Narrowleaf Stoneseed. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial cleistogamic flowers present, in fruit usually with recurved pedicels. Flowers monomorphic.
- Schweich Hill, One plant seen. Tom Schweich 1541. 5/2/2017. Uncommon, scattered throughout parcel; these from top of hill. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1617. 15 May 2017. ( COLO02347938‡ KHD00065499‡ ) .
- Stonebridge Homeowners Association,
Tom Schweich 3251.
6/13/2023.
.
.
Lithospermum occidentale (Mack.) Weakley, Witsell & D. Estes. (Syn: Onosmodium bejariense DC. ex A. DC. var. occidentale (Mack.) B. L. Turner , Onosmodium molle Michx. ) Western Marbleseed. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Open Space (City of Golden), 4134. 6/1/2025. .
- Heritage Dells, South Gulch, 6152. 6/1/2026. .
- North Table Mountain Open Space (City of Golden), Highest prairie mixed with foothill shrubs, also collected nearby: Aegilops cylindrica, Hesperostipa comata, Sphaeralcea coccinea, Linaria dalmatica, and Thinopyrum intermedium. Lower southwest slopes of North Table Mountain, along the lower portion of the City of Golden North Table Mountain trail, 1.9 km. north of the GNIS location of Golden. Tom Schweich 2052. 4 Jun 2019. ( CDA0052289‡ JCOS s.n. KHD00072802‡ OBI ‡ ) .
- Tripp Ranch Meadow Open Space,
Tom Schweich 3571.
6/8/2024.
.
.
 Coll. No. 2107, Lithospermum occidentale |
 Gynobase of Lithospermum occidentale |
 Lithospermum occidentale on the west side of Green Mountain |
Mertensia lanceolata (Pursh) DC. Prairie Bluebells. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, with spreading-ascending branches to 20 cm.; Stem, glabrous; Leaves, basal and cauline, basal, petiole 55 mm. + blade 50 mm. × 12.5 mm. wide, lanceolate, distinct lateral veins, papillate adaxially, margin, entire, appressed ciliate; cauline, sessile, 40 mm. × 4 mm. wide, without distinct lateral veins, papillate to strigose (oriented toward apex) adaxially, margin, entire, appressed ciliate; Inflorescence, panicle; Calyx, not divided to base, tube 1.5 mm. + lobes 2-3 mm.; Corolla, tube 4.0-6.5 mm. + lobes 4.5-7.5 mm., free 2.0 mm., limb 5-10 mm., deciduous, blue, small tufts or a ring of hairs near (2.2 mm.) base of throat; Stamens, #5-6, inserted, attached just below (0.5 mm.) throat/fornices; Filaments, 2.0-3.5 mm., strap-shaped, filaments ≥ anthers; Anthers, 1.8-2.3 mm., versatile, yellow; Ovary, 0.7 mm. × 1.3 mm. wide, partially fused to calyx; Style, 7.0-7.5 mm., single, ±≥anthers; Stigma, simple; Fruit, #4 nutlets, 1.7 mm. × 1.5 mm. wide. (Described from Coll. Nos. 1906 & 2035.)
- Heritage Dells, North Gulch, 4649. 4/23/2026. .
- Kinney Run, Tom Schweich 1848. 5/15/2020. .
- North Hogback Open Space (City of Golden), 4520. 4/11/2026. .
- Parfet Prehistoric Preserve, 4068. 5/12/2025. .
- Schweich Hill, Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue. North-central portion of open space on northeast slopes. Tom Schweich 1595. 2 May 2017. ( CS KHD00065387‡ ) .
- Stonebridge Homeowners Association, Tom Schweich 3250. 6/13/2023. .
- Tripp Ranch Meadow Open Space,
2759.
6/10/2022.
.
.
Oreocarya virgata (Porter) Greene. (Syn: Cryptantha virgata (Porter) Payson ) Miner"s Candle. CalPhotos. Jepson eFlora. SEINet Taxon.
- Grant Terry Open Space, iNaturalist Observation 217642178. chancy14 5927. 5/22/2024. iNaturalist Observation 217322493. geoskimom 5926. 5/20/2024. .
- Schweich Hill, Observed on CoNPS field trip, coordinates approximate. Tom Schweich 1670. 6/10/2018. .
- South Table Mountain Open Space (City of Golden), 6060. 5/13/2026. . .
Phacelia hastata Douglas ex Lehm. Silverleaf Phacelia. CalPhotos. Jepson eFlora. SEINet Taxon.
- South Table Mountain Open Space (City of Golden),
6050.
5/13/2026.
6053.
5/13/2026.
.
.
 Coll. No. 2081, Phacelia heterophylla |
 Coll. No. 3494, Phacelia hastata. |
Phacelia heterophylla Pursh. Varileaf Phacelia. CalPhotos. Jepson eFlora. SEINet Taxon.
Described by Pursh (1814) from a collection by M. Lewis Jun-Jul, 1806 on the banks of the Kooskooskie (Clearwater) River.
- Stonebridge Homeowners Association,
Tom Schweich, with Ann Norton 2213.
6/12/2021.
.
 Habitat of Coll. No. 1138, Phacelia heterophylla |
Coll. No. 2081, Phacelia heterophylla |
Brassicaceae
Alliaria petiolata (M. Bieb.) Cavara & Grande. Garlic Mustard. Weed: CO DofA, List: Watch. CalPhotos. Jepson eFlora. SEINet Taxon.
- Tucker Gulch (lower),
Also collected nearby: Lithospermum arvense, Lunaria annua, Fumaria vaillantii, and Veronica biloba.
Colorado Noxious Weed Watch List.
On east bank of Tucker Gulch near the City of Golden Tucker Gulch Trail between 1st Street and 7th Place, 1.49 km. north northwest of the GNIS location of Golden.
Tom Schweich, with Cindy Trujillo 2481.
27 May 2021.
(
COLO2706604‡
KHD00075602‡
OBI185095‡
)
.
.
 Coll. No. 2481, Alliaria petiolata |
Alyssum alyssoides (L.) L. (Syn: A. campestre (L.) L. , Clypeola alyssoides L. ) CalPhotos. Jepson eFlora. SEINet Taxon.
- Eagle Ridge,
On mesa slope in foothills.
Notes: Transferred from USGS Herbarium, Denver, CO (2005).
United States, Colorado, Jefferson, Foothills of the Front Range, at junction of US 6 and road to Morrison, about 1 mile east of Golden.
Handsford T. Shacklette 5899.
27 Jun 1959.
(
COLO528506‡
)
.
.
 Coll. No. 2063.2, Alyssum alyssoides |
Alyssum simplex Rudolphi. (Syn: A. campestre (L.) L. var. simplex (Rudolphi) Willd. , A. minus Rothm. , A. parviflorum Fisch. ex M.Bieb. ) European Madwort. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual, tap-rooted, to 12-30 cm., stellate hairy throughout (typically doubly branched and 8-pointed); Stem branched at base, ascending; Leaves basal, withered at flowering, appear compound, cauline, alternate, 14-28 mm. × 3.5-5.0 mm., oblanceolate, margin entire, tip acute, sessile or vaguely short-petioled; Inflorescence not bracted; Pedicels, in fruit, 4.5 mm.; Sepals, 4, 2 mm. × 0.7 mm. wide, deciduous in fruit; Petals 2.9-3.0 mm., yellow fading white,clawed, entire to tip slightly notched; Stamens, 2.5-2.6 mm.; Filaments, 2.3 mm., winged proximal 1.5-1.8 mm., not toothed; Style persistent, 1.3 mm., few hairs at base; Fruit round, 3.5-5.0 mm. × 5.6 mm. wide, margin entire, compressed parallel to the replum, hairy, hairs thinning as fruit matures; Ovules, 4 (most keys and descriptions say 2 when they give a specific number, but the genus is described as having 1-2[4] ovules). (Described from Clyde Golden, 25 Jun 2011, Coll. No. 1090, 30 Apr 2015, and Coll. No. 1367, 24 May 2016).
- Coors Tech Wetland Open Space, 5976. 5/11/2026. .
- Grampsas North Open Space (City of Golden), 3901. 12/7/2024. .
- Kinney Run South, 3967. 1/3/2025. 4464. 4/9/2026. .
- Parfet Open Space (City of Golden), 4099. 6/1/2025. .
- Heritage Dells, North Gulch, 4620. 4/23/2026. .
- Heritage Dells, South Gulch, 6124. 6/1/2026. .
- Kinney Run, 4445. 3/30/2026. .
- Magic Mountain Archeological Site, Tom Schweich 1642. 4/18/2018. .
- North Hogback Open Space (City of Golden), Tom Schweich 1696. 6/14/2019. Grassy southwest facing slope. Also collected here: Erodium cicutarium, Euphorbia esula, and Castilleja integra. Southern end of the hogback in northernmost Golden, 4.15 km. north northwest of the GNIS location of Golden. Tom Schweich 2264. 9 May 2020. ( CDA0053727‡ CS OBI149324‡ REGIS ) .
- Parfet Prehistoric Preserve, 3997. 4/30/2025. .
- Schweich Hill, Tom Schweich 1518. 3/27/2017. High plains above Rocky Flats, 1.7 miles west on Colorado Highway 72 from Colorado Highway 93, then 0.9 miles north on Plain View Road, to an old ranch road. Roadside and among short grasses, older terrace of Coal Creek. Tom Schweich 1597. 4 May 2017. ( CAS CDA0050063‡ JCOS s.n. KHD00065385‡ ) East-facing slope. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1613. 15 May 2017. ( COLO02347888‡ EIU KHD00065122‡ ) .
- South Table Mountain Open Space (City of Golden), 6007. 5/13/2026. .
- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2214. 6/12/2021. .
- Tripp Ranch Meadow Open Space, 2747. 6/10/2022. .
- Welch Ditch (Open Space),
4699.
4/25/2026.
.
.
 Alyssum simplex |
 Alyssum simplex |
 Fruit of Coll. No. 1090, Alyssum simplex |
 Coll. No. 1090, Alyssum simplex |
 Coll. No. 1367, Alyssum simplex |
Barbarea vulgaris R. Br. Garden Yellowrocket. CalPhotos. Jepson eFlora. SEINet Taxon.
Probably a biennial or perennial, to 40 cm., terrestrial but growing in flowing water, glabrous throughout; Leaves, lower cauline, 150 mm. × 45 mm. wide, pinnafitid, lyrate, lobes, #9, terminal lobe 47 mm. × 40 mm. wide, auriculate, auricles, glabrous, leaves reduced upward, upper cauline, sessile, 35 mm. × 18 mm. wide, lobes, 3; Inflorescence, not bracted; Flowers, radial; Sepals, 2.5 mm. × 1.8 mm. wide, ovate, rows, #1, color, yellow; Petals, 6 mm., obovate, claw not conspicuously differentiated from blade, margin, entire, color, yellow; Stamens, #6; Filaments, 4 mm., plain; Anthers, 1 mm.; Fruit, pedicels, 5 mm., glabrous, mature, 19.5 mm. × 0.5 mm. wide, spreading, glabrous. (Described from Coll. No. 1818, 16 May 2018.)
- Kinney Run,
Growing in flowing water.
In a tributary to the locally named “Kinney Run,” recognized by the BGN as Deadman Gulch, 2.8 km. south of the GNIS location of Golden.
Tom Schweich 1818.
16 May 2018.
(
CDA0052347‡
JCOS s.n.
KHD00068472‡
)
.
.
 Habitat of Coll. No. 1818, Barbarea vulgaris |
 Coll. No. 2502, Barbarea vulgaris |
 Lyrate lower leaf of Coll. No. 1818, Barbarea vulgaris |
Berteroa incana (L.) DC. Hoary Alyssum. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual terrestrial herb, to 50 cm.; Leaves, cauline, elliptical, 20 mm. × 5 mm.; Flowers, not bracteate; Petals, 4, white, deeply bilobed; Style, 1.4 mm. in young fruit; Fruit, elliptical, 7 mm. × 4 mm. wide × 2 mm. thick, flattened parallel to papery internal partition.
- Magic Mountain Archeological Site, Also collected here: Potentilla recta, Verbascum thapsus, and Vicia villosa. This area was extensively collected by E. H. Brunquist in 1959-1960 during the Peabody Museum excavation at Magic Mountain. B. incana was not collected at that time. Terrace on the north bank of Apex Gulch, between Fire Station 4 and the Kinney Run Trail bridge, 5.72 km. south of the GNIS location of Golden. Tom Schweich 2129. 8 Jul 2019. ( CDA0052301‡ JCOS s.n. KHD00072746‡ OBI186003‡ ) .
- North Hogback Open Space (City of Golden), This parcel designated the North Golden Hogback Open Space in July 2025. In the bottom of the dry wash (Cressman Gulch) that runs along the southwest side of the open space, 3.23 km. northwest of the GNIS location of Golden. Tom Schweich 3453. 20 Jul 2025. ( FLD OBI REGIS ) .
- Parfet Prehistoric Preserve, 4062. 5/12/2025. .
- Tucker Gulch (lower),
Common within the city limits of Golden, along the creek of Tucker Gulch and the Tucker Gulch Trail, about 250 m. north of the First Street Bridge, and 350 m. south southwest of Ford Street.
Tom Schweich 1056.
10 Aug 2014.
(
CAS1142353‡
UC2045782‡
UCR266873‡
)
.
.
 Habitat of Berteroa incana |
 Coll. No. 1056, Berteroa incana |
Brassicaceae . Mustard Family. CalPhotos. Jepson eFlora. SEINet Taxon.
- Tucker Gulch (lower), On a small slump beside the creek. Along the Tucker Gulch recreational trail, 1.52 km north northwest of the GNIS location of Golden Tom Schweich 1335. 11 May 2016. . .
Camelina microcarpa Andrz. ex DC. Little-Podded False Flax. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual, terrestrial, herb, 45 cm. to 80 cm. tall; Stem, erect, mostly single, some branched mid-stem, proximal, simple and forked hairs, distal, glabrous; Leaves, basal, absent or withered, cauline, #11-25, sessile, distal basally lobed 1.2 mm., 26-62 mm. × 6.5-10 mm. wide, reduced above, lanceolate, hairs simple and forked; Inflorescence, to 220 mm. × 35 mm. wide, not bracted, not one-sided; Flowers, radial; Pedicels, 4-8 mm., glabrous; Sepals, #4, rows, #1, 2.4-2.7 mm. × 0.8-1 mm. wide, ovate, color, green, margin chartaceous, tip purplish, abaxially hairy; Petals, 3.7-4.0 mm. × 0.7-0.9 mm. wide, oblong-spatulate, margin, entire, color, yellow; Stamens, #6, 3 mm.; Filaments, plain or maybe very narrowly winged; Anthers, 0.7 mm., ovate; Ovary, 1.8 mm. × 0.9 mm. wide; Style, 0.8 mm.; Stigma, capitate, 0.4 mm. wide; Fruit (mature), pedicels, 15 mm., 3 × than fruit, spreading, 5 mm. × 3.2-3.5 mm. wide, wider above middle, somewhat flattened, parallel to replum, coriaceous, short-winged (or strong-margined), valve mid-vein apparent but not prominent; Seeds, many, 1.0 mm. × 0.7 mm. wide, angled, papillate (Described from Coll. No. 1876 and 1883).
- Eagle Ridge, On mesa slope in foothills. Transferred from USGS Herbarium, Denver, CO (2005). Foothills of the Front Range, at junction of US 6 and road to Morrison, about 1 mile east of Golden. Hansford T. Shacklette 5901. 27 Jun 1959. ( COLO528474‡ ) .
- Parfet Open Space (City of Golden), 4119. 6/1/2025. .
- Schweich Hill, One plant, next to Rhus trilobata Tom Schweich 1685. 5/25/2019. .
- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2215. 6/12/2021. .
- Tripp Ranch Meadow Open Space,
Tom Schweich 3573.
6/8/2024.
.
.
 Coll. No. 1876, Camelina microcarpa |
 Coll. No. 2936, Camelina microcarpa. |
Capsella bursa-pastoris (L.) Medik. Shepherd's Purse. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual, scapose, to 27 cm., hairs, sessile, stellate, 3-4 points, throughout; Leaves, basal, oblanceolate, 55 mm. × 16 mm. wide, deeply lobed, but not all the way to mid-rib; cauline, 4-5 stem leaves, lanceolate, 25 mm. × 10 mm. wide, base sagittate; Flowers, small, petals white; Fruit, obcordate, 4 mm. × 3.5 mm. wide. The single species in this genus; described by some as the second-most common weed on Earth (Described from Coll. No. 1336, 11 May 2016).
- Stonebridge Homeowners Association, Tom Schweich 3252. 6/13/2023. .
- Tucker Gulch (lower),
Common “weed” beside Tucker Gulch Trail.
230 m. north of the First Street bridge, 1.55 km north northwest of the GNIS location of Golden
Tom Schweich 1336.
11 May 2016.
(
CS
KHD00063529‡
)
.
.
 Coll. No. 1336, Capsella bursa-pastoris |
 Coll. No. 2017, Capsella bursa-pastoris |
Chorispora tenella (Pall.) DC. Crossflower. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual, hairs 0, sparsely stalked-gland-dotted; Leaves basal, withered at flowering, cauline simple, not basally lobed or clasping; Flowers radial; Corolla purple; Stamens 6; Ovary linear when young; Fruit linear, bilateral, to 4 cm, seed in proximal 2.5 cm., tip pointed; Seeds in two rows, brown, 1 mm (Described from Coll. No. 301, 5 Nov 2012).
- Kinney Run, Between Kinney Run Trail and the creek, just north of Tripp Ranch, 3.36 km. south of the GNIS location of Golden. Tom Schweich 1778. 12 Apr 2018. ( EIU KHD00068467‡ ) .
- Parfet Prehistoric Preserve, 3994. 4/30/2025. .
- Schweich Hill, Margin of social trail, flower only, no fruit, not collected. Tom Schweich 1810. 4/24/2020. Beside the primary east-west social trail, in an area mowed by adjacent private landowners in an effort to widen the social trail. Also collected here: Chenopodium album, Cirsium arvense, Lactuca serriola, and Bromus inermis. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 2.24 km. northwest of the GNIS location of Golden. Tom Schweich 2273. 12 May 2020. ( CDA0053732‡ CS KHD00072471‡ REGIS ) .
- Tucker Gulch (lower), Small colony of this common early spring weed. Disturbed area between paths, 1.33 km north northwest of the GNIS location of Golden Tom Schweich 1330. 11 May 2016. ( CDA0050050‡ COLO02348423‡ CS KHD00063633‡ ) .
- Welch Ditch (Open Space),
4732.
4/25/2026.
.
.
Descurainia incisa (Engelm.) Britton ssp. incisa. (Syn: D. incisa (Engelm.) Britton ssp. viscosa Rydb.) G. Mulligan ) Mountain Tansymustard. CalPhotos. Jepson eFlora. SEINet Taxon.
- South Table Mountain Open Space (City of Golden),
6013.
5/13/2026.
.
.
 Coll. No. 2464, Descurainia incisa ssp. incisa |
 Coll. No. 3347, Descurainia incisa ssp. incisa. |
Descurainia pinnata (Walter) Britton ssp. brachycarpa (Richardson) Detling, Amer.Midl. Naturalist. 22: 509. Western Tansymustard. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Open Space (City of Golden),
4121.
6/1/2025.
.
.
 Coll. No. 2934, Descurainia pinnata ssp. brachycarpa. |
Descurainia sophia (L.) Webb. Tansy Mustard. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual, 30 cm. (to 50 cm. when growing among grasses), not scapose; Tap root; Stem simple at base, branched distally; Hairs many-branched; Leaves basal 0, cauline compound, 2-3 pinnately dissected, sessile, not basally lobed, sagittate, or clasping; Inflorescence not bracted; Pedicel, in fruit diverging 30–45°; Petals yellow, 2.5 mm.; Ovary linear; Stigma ąentire (there are clearly two separate segments of the stigma that are receptive, but there is no central cleft between them); Fruit (7-15 mm.) -25 mm., linear (not fusiform or club-shaped), glabrous, not appressed; Septum veined Seeds, multiseriate (Described from Coll. Nos. 404, 854, and 935).
- Eagle Ridge,
On mesa slope in foothills.
Transferred from USGS Herbarium, Denver, CO (2005).
Foothills of the Front Range, at junction of US 6 and road to Morrison, about 1 mile east of Golden.
Hansford T. Shacklette 5902.
27 Jun 1959.
(
COLO528494‡
)
.
.
 Coll. No. 935, Descurainia sophia |
 Coll. No. 404, Descurainia sophia |
 Coll. No. 854, Descurainia sophia |
 Coll. No. 854, Descurainia sophia |
Draba nemorosa L. Woodland Whitlow Grass. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual terrestrial herb, 11 to 25 cm., hairs vary: none, simple, forked, but not dolabriform; Stem, proximal, hairs simple and forked, distal, glabrous; Leaves, basal and cauline, Basal, simple, 12 mm. × 4.5 mm. wide, hairs forked; Cauline, #5-6, sessile, 11 mm. × 4 mm. wide, sparsely dentate, hairs, simple and forked; Inflorescene, raceme; Sepals, rows, #1, 1.3 mm. × 0.7 mm. wide, ovate, color, green turning yellow, abaxial hairs wavy; Petals, 2 mm. × 0.7 mm. wide, spoon-shaped, margin entire, color, yellow; Stamens, #4 or 6, 1.3 mm.; Anthers, 0.3 mm.; Style, very short; Fruit, pedicels, 20 mm., puberulent, body, 7 mm. × 2 mm. wide, ascending, short straight appressed hairs (Described from Coll. No. 1821, 16 May 2018).
- Kinney Run, Among deep grasses, forbs, and a few shrubs. Small alluvial terrance between the streambeds of Kinney Run and Deadman Gulch, 2.8 km. south of the GNIS location of Golden Tom Schweich 1821. 16 May 2018. ( COLO02348142‡ KHD00068466‡ UCR ‡ ) .
- Magic Mountain Archeological Site,
In disturbed, fairly fertil ground; unshaded; soil well drained.
13N 0481911E 4396272N.
Ernest H. Brunquist 86.
17 Apr 1960.
(
KHD18224‡
)
.
.
 Inflorescence of Coll. No. 1821, Draba nemorosa |
 Coll. No. 1821, Draba nemorosa |
 Overview of Coll. No. 1821, Draba nemorosa |
 Coll. No. 2018, Draba nemorosa |
Draba reptans (Lam.) Fernald. Carolina Whitlow Grass. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual, from slender taproot, to 10 cm.; Leaves, basal, withered in fruit, entire, cauline, 0-1 pair per stem, 6 mm. × 2 mm. wide, entire, hairs branched; Pedicels, glabrous; Flowers, petals, color unknown; Fruit, distributed in upper ⅕-⅓ of rachis (Described from Coll. No. 1376, 29 May 2016).
- Magic Mountain Archeological Site,
Habitat: In apparently poor" soil, well-drained; on the south exposed gentle slope of a hill."
USA, Colorado, Jefferson, Between 100 and 200 yards from the DIG, to the northeast of it.
Ernest H. Brunquist 81.
17 Apr 1960.
(
KHD18219‡
)
.
.
 Coll. No. 1376, Draba reptans |
Erysimum capitatum (Hook.) Greene. Sanddune Wallflower. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial or at least biennial, 16 cm. 25-45 cm., hairs dolabriform throughout; Root, tap; Stems, erect, leafy, proximal not woody hairs as above; Leaves, basal and cauline, basal, petiole, indistinct, ±10 mm., + blade, 50-100 mm. × 2.5-3 mm. wide, narrowly oblanceolate, margin 1-3 shallowly pinnate dentate, cauline, nearly sessile, 42 mm. × 2.5 mm. wide, ±linear, margin, entire, reduced distally; Inflorescence, raceme 130 mm. × 45 mm. wide, not bracted; Pedicels, 3-6 mm., elongating as flower matures, ascending; Flowers, radial; Sepals, #4, rows, 1, 7 mm. × 1-1.5 mm. wide, narrow and wide pairs opposite, lateral pair basally saccate; Petals, claw, 10-11 mm. + blade 6-9 mm. × 4-6 mm. wide, spoon-shaped, margin, entire, color, yellow, orange; Stamens, #6, 11 & 15 mm., tetradynamous (2 short, 4 long); Anthers, 4.5 mm.; Ovary, 4 mm.; Style, 9 mm.; Stigma, capitate; Fruit, 17-34 mm. × 1 mm. wide, 4-angled, ascending, hairy as above; Seeds, unknown (Described from Coll. Nos. 206, 1835, & 2306).
- North Hogback Open Space (City of Golden), Amid grasses and forbs; also collected nearby: Rhus trilobata, Delphinium carolinum virescens, Potentilla recta, Thermopsis divaricarpa, Grindelia squarrosa, and Nassella viridula. Unusually large numbers in bloom here, perhaps a result of the wet Spring. Mid-slope on the west limb of Dakota Ridge, a hogback in north Golden that structurally related to Dinosaur Ridge in south Golden, 4.38 km. northwest of the GNIS location of Golden. Tom Schweich 2474. 25 May 2021. ( OBI185091‡ ) .
- South Table Mountain Open Space (City of Golden),
West facing slope with Prunus virginiana.
South Table Mountain, a lava capped mesa in the Denver Formation. On a west facing slope below Castle Rock. 13 0481938E 4400443N.
Mary E. Edwards 427.
1 Jun 1983.
(
COLO00191916‡
KHD20929‡
)
.
.
Hesperis matronalis L. Dame's Rocket. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 50 cm., hairs, forked on stem, leaf, and sepal, but not fruit; Leaves, basal, withered at flowering, cauline, petiole 3-5 mm. + blade 100 mm. × 35 mm. wide, lanceolate, margin, small-toothed; Inflorescence, raceme; Sepals, #4, 5-6 mm., green, margins purple; Petals, #4, 13 mm. × 4 mm. wide, clawed, purple; Fruit, silique, 40 mm. × 0.6 mm. wide; Seed, 1.7 mm., brown, glabrous (Described from Coll. No. 1441, 15 June 2016).
- Cressmans Gulch, 4551. 4/15/2026. Picea pungens, Onopordum sp., Cynoglossum officinale, Acer negundo, Verbascum thapsus left bank of Cressmans Gulch at mouth with Tucker Gulch Tom Schweich 3555. 15 Apr 2026. ( Undist. ) .
- Deadman Gulch, The pond was reconstructed by the City of Golden late in 2016. Deadman Gulch is locally euphemistically referred to as “Kinney Run.” Colorado Noxious Weed List B. Adjacent to a small artificial pond in Deadman Gulch, about 150 m. upstream of the gulch undercrossing of US Highway 6, 2.5 km. south of the GNIS location of Golden. Tom Schweich 1441. 15 Jun 2016. ( CS JCOS s.n. KHD00063536‡ ) .
- Heritage Dells, North Gulch, 4608. 4/23/2026. .
- Heritage Dells, South Gulch, 6132. 6/1/2026. .
- Welch Ditch, Colorado Noxious Weed List B. Inside the former Welch Ditch, south side of Clear Creek, just inside the mouth of Clear Creek Canyon, 2.26 km. west southwest of the GNIS location of Golden. Tom Schweich 2316. 3 Jun 2020. ( CDA0053747‡ REGIS ) .
- Welch Ditch (Open Space),
4740.
4/25/2026.
.
.
 Hesperis matronalis in the ditch. |
 What the well-dressed botanist wears while chasing noxious weeds in the grass. |
 Coll. No. 1441, Hesperis matronalis |
 Coll. No. 2808, Hesperis matronalis |
Lepidium draba L. (Syn: Cardaria draba (L.) Desv. ) White Top, Hoary Cress. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial, herb, to 45 cm., spreading by rhizomes, hairs simple; Leaves, basal, not seen, cauline, sessile, base auriculate, 36 mm. × 12 mm. wide, oblanceolate, margin irregularly toothed, reduced above; Flowers, petals, white; Style, immature, 1 mm.; Fruit, silicle, immature, 1.3-1.5 mm. × 0.5-1.0 mm. wide, flattened, wings 0, glabrous, reticulate-veined (Described from Coll. No. 1366, 24 May 2016).
- Eagle Ridge, On mesa slope in foothills. Transferred from USGS Herbarium, Denver, CO (2005). Foothills of the Front Range, at junction of US 6 and road to Morrison, about 1 mile east of Golden. Hansford T. Shacklette 5897. 27 Jun 1959. ( COLO528466‡ ) .
- Cottonwood Natural Area, 3957. 12/27/2024. .
- Kinney Run, 4438. 3/30/2026. .
- Parfet Prehistoric Preserve,
4020.
4/30/2025.
.
.
 White Top plants arising from a rhizome. |
 Habitat of Coll. No. 1366, Lepidium draba |
 Coll. No. 1874, Lepidium draba |
 Coll. No. 1366, Lepidium draba |
 Fruit of Coll. No. 1874, Lepidium draba |
Lepidium latifolium L. (Syn: Cardaria latifolia (L.) Spach ) Broad-Leaved Pepper-Grass. CalPhotos. Jepson eFlora. SEINet Taxon.
- Magic Mountain Archeological Site,
4362.
7/30/2025.
.
.
 Weber & Randolph Coll. No. 17349, Lepidium latifolium |
Lunaria annua L. Money Plant. CalPhotos. Jepson eFlora. SEINet Taxon.
- Tucker Gulch (lower),
Nautralized.
On both banks of Tucker Gulch near the City of Golden Tucker Gulch Trail between 1st Street and 7th Place, 1.45 km. north northwest of the GNIS location of Golden.
Tom Schweich 2479.
27 May 2021.
(
COLO2706703‡
KHD00075603‡
OBI185093‡
)
.
.
 Coll. No. 2479, Lunaria annua |
Nasturtium officinale W. T. Aiton. (Syn: Rorippa nasturtium-aquaticum (L.) Hayek ) Watercress. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb to 15 cm., aquatic, hairs 0; Caudex 0; Roots, fibrous, rooting at nodes; Stem decumbent, leafy; Leaves cauline, compound, pinnately divided, petioled, Inflorescence not bracted, not one-sided; Flowers radial; Sepals 2-2.3mm., ovate to obovate; Petals 2.5-4.0 mm., white, obovate to spoon-shaped, margins entire; Stamens 6; Filaments plain; Fruit, young linear, mature 13 mm. x 1.8 mm. wide; Ovules (seeds) many, 2 rows. Treated as native to California by TJM2 and Colorado by Ackerfield (2015), but alien by Weber & Wittmann (2012) and introduced by USDA Plants. (Described from Coll. No. 889, 23 August 2012, and 2133, 7 Jul 2019).
- Magic Mountain Archeological Site, Flowing water below a well or casing-enhanced spring. This area was extensively collected by E. H. Brunquist in 1959-1960 during the Peabody Museum excavation at Magic Mountain. N. officinale was not collected at that time. Terrace on the north bank of Apex Gulch, between Fire Station 4 and the Kinney Run Trail bridge, 5.73 km. south of the GNIS location of Golden. Tom Schweich 2133. 8 Jul 2019. ( JCOS s.n. KHD00074283‡ OBI186022‡ UCR ) .
- Tucker Gulch (lower),
Urban flora, this location likely disturbed many times by road and other construction. Also collected here: Schoenoplectus tabernaemontani.
In the water of Tucker Gulch, the stream draining Golden Gate Canyon, between Joseph Circle and Colorado Highway 93, 2.92 km. northwest of the GNIS location of Golden.
Tom Schweich 2847.1
6 Jul 2022.
(
COLO
)
.
.
 Coll. No. 889, Nasturtium officiniale |
 Inflorescence of Coll. No. 2133, Nasturtium officinale |
 Inflorescence of Coll. No. 2133, Nasturtium officinale |
Physaria montana (A. Gray) Greene. (Syn: Lesquerella montana (A. Gray) S. Watson ) Mountain Bladderpod. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial, rosette to 5 cm. dia., flowering stems to 14 cm., not in alpine environment, eastern slope, hairs stellate throughout; Leaves, basal, rosette, 9 mm. × 6.5 mm., ovate, entire, petiole, 12 mm., cauline, 10 mm., appearing secund, narrowly oblanceolate; Inflorescence, exceeding leaves; Pedicels, in fruit, ascending; Fruit, 5 mm. × 2 mm., ovate-elliptic, hairs stellate, apex entire (not notched, although these immature). (Described from Coll. No. 1081, 23 Apr 2015).
- North Hogback Open Space (City of Golden), 4523. 4/11/2026. In upturned rocks on the spine of the hogback, also seen or collected here: Eriogonum umbellatum, Penstemon virens, Ribes cereum, Coryphantha vivipara, and Cercocarpus montanus. Southern end of the hogback in northernmost Golden, 4.19 km. north northwest of the GNIS location of Golden. Tom Schweich 2271.1 9 May 2020. ( COLO2433753‡ ) In upturned rocks on the spine of the hogback, also seen or collected here: Eriogonum umbellatum, Penstemon virens, Ribes cereum, Coryphantha vivipara, and Cercocarpus montanus. Southern end of the hogback in northernmost Golden, 4.21 km. north northwest of the GNIS location of Golden. Tom Schweich 2272. 9 May 2020. ( CS REGIS ) .
- Schweich Hill,
Top of hill, among most intact area of native vegetation.
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden.
Tom Schweich 1642.
30 May 2017.
(
CDA0050033‡
KHD00065337‡
)
.
.
 Coll. No. 2796, Physaria montana. |
 Coll. No. 1081, Physaria montana |
 Inflorescence of Coll. No. 1377, Physaria montana |
 Coll. No. 1377, Physaria montana |
Physaria vitulifera Rydb. Bull. Torrey Bot. Club 28: 278. 1901. (Syn: P. vitulifera × bellii ) Roundtip Twinpod. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial, terrestrial herb, caespitose, stellate hairy throughout, flowering branches to 15 cm.; Roots, tap; Stem, scapose, hairs as above; Leaves, basal and cauline, basal, petiole 10-35 mm. + blade 22-24 mm. × 8-14 mm. wide, elliptic, weakly pinnately lobed, to few basal leaves with a single pair of teeth, otherwise entire, tip barely acuminate, cauline, alternate, nearly sessile, 13-22 mm. × 4-4.5 mm. wide, oblancelate, margin entire; Pedicel, 5 mm., ascending, becoming s-shaped in fruit; Sepals, #4, 5-7 mm. × 1.5 mm. wide, lanceolate, green, hairy as above; Flowers, Petals, #4, 10 mm. × 2-2.5 mm. wide, obovate, margin entire, color yellow; Stamens, #6 (4 long, 2 short), 6-8 mm.; Filaments, 4.5-6 mm., pair of short filaments slightly winged proximal ½; Anthers, 1.5 mm., saggitate (?); Ovary, 2 mm. × 1.8 mm. wide; Style, #1, 4-6.4 mm., persistent, not elongating in fruit; Fruit, pedicels, 18-20 mm, longest sigmoid, hairs as above, mature fruit, didymous, 3-4.5 mm. × 4 mm. wide, round, apical sinus well-developed, basal sinus much less so, hairy as above; Ovules, 4 per ovary (Described from Coll. No. 1345, 12 May 2016 and Coll. No. 1828, 16 May 2018). Some will key to P. bellii in Ackerfield (2015) at couplet 17 per the shape of the basal leaves, which can be entire to very shallowly once dentate. However, FNANM sends this in the direction of P. vitulifera at couplet 12 based on the relative development of the basal and apical sinuses of the fruit.
- Grant Terry Open Space, iNaturalist Observation 345761167. alicia_marie_art 5873. 3/28/2026. iNaturalist Observation 267611781. cathybaird 5871. 3/29/2025. iNaturalist Observation 217642698. chancy14 5870. 5/22/2024. iNaturalist Observation 349789890. craftycass 5876. 4/13/2026. iNaturalist Observation 217322447. geoskimom 5869. 5/20/2024. iNaturalist Observation 315593406. keolsen 5872. 9/21/2025. iNaturalist Observation 127943341. miaerick 5866. 7/25/2022. iNaturalist Observation 153775650. popmybladderpod 5868. 4/6/2023. iNaturalist Observation 153774802. stillbirding 5867. 4/6/2023. iNaturalist Observation 345821222. suzanne11 5874. 3/28/2026. iNaturalist Observation 345822733. suzanne11 5875. 3/28/2026. .
- Kinney Run, 4454. 3/30/2026. 4460. 3/30/2026. In and around the rock outcrop of the hogback. Tom Schweich 1589. 4/12/2018. Basal leaves just barely sculpted, petiole 5mm. wide. Tom Schweich 1813. 4/27/2020. Approximate northern extent of Physaria. Tom Schweich 1814. 4/27/2020. Approximate south end of outcrop and Physaria. Tom Schweich 1815. 4/27/2020. Growing in fractures of sandstone outcrops. Outcrops of sandstone about 2/3 of the way up the west limb of the hogback, east side of Kinney Run, 3.07 km. south of the GNIS location of Golden. Tom Schweich 1828. 16 May 2018. ( CAS CDA0052350‡ COLO02347714‡ EIU KHD00068464‡ UCR ‡ ) Combined with Coll. No. 1828. Tom Schweich 1828.1 16 May 2018. ( Golden ) Combined with Coll. No. 1828. Tom Schweich 1828.2 16 May 2018. ( Golden ) Tom Schweich 1840. 5/15/2020. Tom Schweich 1844. 5/15/2020. Common on outcrops of Lykens sandstone. Colorado rare plant: G3/S3: Vulnerable, found locally in a restricted range. Collection made to rule out P. vitulifera × bellii. Near the top of steep sandstone outcrops, east side of Kinney Run, just north of Tripp Ranch, 4.4 km. south of the GNIS location of Golden. Tom Schweich 2276. 15 May 2020. ( Golden ) .
- North Table Mountain Open Space (City of Golden), just beginning to bloom, two open flowers 4428. 3/13/2026. .
- South Table Mountain Open Space (City of Golden), 6039. 5/13/2026. 6051. 5/13/2026. Associated Species: Opuntia polycantha, Jim Hill mustard, Tragapogon ssp, Artemesia frigida, A. ludoviciana, Oxybaphus linearis. Coll. No. 01WYBLM11DW United States, Colorado, Jefferson, West slope of South Table Mountain and North Table Mountain, prominent mesas located just east of the city of Golden and South of Clear Creek which flows through Golden in an easterly direction. Stanley Smookler and Denise Wilson 1 Jul 2011. ( CHIC16970‡ ) crack in rock beside Lubahn Trail Tom Schweich 3327. 7/7/2023. several large plants in recently placed boulders Tom Schweich 3328. 7/7/2023. .
- Welch Ditch,
in bank on southwest side of ditch.
Tom Schweich 2118.
5/19/2021.
.
.
Rorippa palustris (L.) Besser. (Syn: R. islandica (Oeder ex Murray) Borbas ) Bog Yellow-Cress. CalPhotos. Jepson eFlora. SEINet Taxon.
- Magic Mountain Archeological Site,
moist gnd
ca 2 1/2 mi S of Golden. T R70W S10.
Ernest H. Brunquist 36.
22 Aug 1959.
(
CS23925‡
)
.
.
 Coll. No. 1938, Rorippa palustris |
 Coll. No. 3148, Rorippa palustris. |
 Inflorescence of Coll. No. 1938, Rorippa palustris |
Sisymbrium altissimum L. Tall Tumblemustard. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual terrestrial herb, to 50 mm.; Roots, tap; Stem, erect, branched above, leafy, few simple hairs; Leaves, basal and cauline, basal: compound, (petiole short if at all present), 120 mm. × 28 mm. wide, oblong, pinnately divided, few simple hairs on petioles, mid-ribs, and margins; cauline: nearly sessile, lanceolate, very finely pinnately divided; Flowers, radial; Sepals, #4, rows, 1, 3.5-4.5 mm. × 0.8 mm. wide, small hood-shaped appendage at tip; Petals, 7 mm. × 1.5 mm. wide, margin, entire, color, yellow; Stamens, tetradynamous, 3.6, 5.2 mm.; Filaments, plain; Anthers, 2 mm.; Stigma, (weakly) 2-lobed; Fruit, 17 mm. × 0.5 mm. wide, ascending, glabrous. Described from Coll. No. 1845, 18 May 2018.
- Schweich Hill, In the formerly mowed area, along the northeast side. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.73 km. north northeast of the GNIS location of Golden. Tom Schweich 1845. 18 May 2018. ( COLO02347698‡ KHD00068460‡ UCR ‡ ) .
- South Table Mountain Open Space (City of Golden),
6014.
5/13/2026.
.
.
 Coll. No. 1845, Sisymbrium altissimim |
Thlaspi arvense L. Field Penny Cress. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual, tap-rooted, to 50 cm., generally glabrous throughout; Stem, single, or few-branched proximally; Leaves, basal and cauline, basal, withered at flowering, cauline, sessile, auriculate, oblong, 30 mm. × 5-9 mm. wide, reduced distally, dentate; Inflorescence, raceme; Sepals, 2 mm. × 1 mm. wide, ovate; Petals, 3-3.5 mm. × 1 mm. wide, spoon-shaped, margin entire, white; Stamens, 2 mm.; Anthers, 0.5 mm.; Fruit, pedicels 10-15 mm., ascending to spreading, glabrous, fruit obovate, 10 mm. × 8 mm., wide, margin winged, tip notched 1 mm.; Ovules, biseriate, #many (Described from Coll. No. 1324, 4 May 2016).
- Coors Tech Wetland Open Space, 5987. 5/11/2026. .
- Parfet Open Space (City of Golden), 4127. 6/1/2025. .
- Heritage Dells, North Gulch, 4609. 4/23/2026. .
- Heritage Dells, South Gulch, 4500. 4/9/2026. .
- Kinney Run, Among deep grasses, forbs, and a few shrubs. Small alluvial terrance between the streambeds of Kinney Run and Deadman Gulch, 2.8 km. south of the GNIS location of Golden Tom Schweich 1820. 16 May 2018. ( CDA0052348‡ COLO02348134‡ EIU JCOS s.n. ) .
- North Table Mountain Open Space (City of Golden), 4207. 6/23/2025. Along a social trail above Peery Parkway, adjacent to running water from spring above on upper slopes of North Table Mountain, 1.26 km north northeast of the GNIS location of Golden. Tom Schweich 1324. 4 May 2016. ( CAS JCOS s.n. KHD00063632‡ OBI83178‡ UC UCR277963‡ ) .
- Schweich Hill, Along the north fence. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.73 km. north northeast of the GNIS location of Golden. Tom Schweich 1846. 18 May 2018. ( CAS KHD00068459‡ UCR ‡ ) .
- South Table Mountain Open Space (City of Golden), In damp South facing gully under Willow tree. South Table Mountain. 13N 0482039E 4400470N. Loraine Yeatts 481. 16 May 1983. ( COLO00208231‡ KHD19691‡ ) .
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2293. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 Tom Schweich, with Ann Norton 2216. 6/12/2021. .
- Welch Ditch (Open Space),
4684.
4/25/2026.
.
.
 Brassicaceae Thlaspi arvense |
 Habitat of Coll. No. 1365, Thlaspi arvense |
 Coll. No. 1365, Thlaspi arvense |
 Coarsely dentate leaves of Coll. No. 1820, Thlaspi arvense |
Turritis glabra L. (Syn: Arabis glabra (L.) Bernhardi ) Tower Rockcress. CalPhotos. Jepson eFlora. SEINet Taxon.
Short-lived (?) perennial, terrestrial, herb, 45 cm. to 90 cm. tall; Roots, tap. Stem, erect, #1, (1 of 4 specimens has 2 stems), leafy, proximal, simple and forked hairs, distal, glabrous; Leaves, basal and cauline, basal simple, petiole, 6 mm., blade, 60 mm. × 15 mm. wide, oblanceolate, hairs, simple and forked, margin, dentate, tip, obtuse; cauline, #20, sessile, lobed, 2.5 mm., 40 mm. × 10 mm. wide, lanceolate, reduced above, margin, entire, becoming glabrous distally; Inflorescence, raceme, 70 mm. × 11 mm. wide, not bracted, not one-sided; Pedicels (at anthesis), 3-4 mm., glabrous; Sepals, #4, 2.5 mm. × 1.1 mm. wide, ovate, green, margin chartaceous; Petals, 4.5 mm. × 0.7 mm. wide, spatulate, margin entire, color, pinkish, fading lavender; Fruit, (24-) 80-85 mm. × 0.9 mm. wide, ascending-appressed, glabrous, flattened, parallel to replum, style, base 0.4-0.5 mm. wide, stigma, 0.8-0.9 mm. wide; Ovules, biseriate, many, 0.7 mm. × 0.3 mm. wide, tan, translucent, wing not apparent. (Described from Coll. No. 1887, 28 May 2018).
- Parfet Open Space (City of Golden), 4139. 6/1/2025. .
- Heritage Dells, South Gulch, 6137. 6/1/2026. .
- North Table Mountain Open Space (City of Golden), 4198. 6/23/2025. .
- Tripp Ranch Meadow Open Space,
Tom Schweich 3572.
6/8/2024.
.
 Coll. No. 1887, Turritis glabra |
Cactaceae
Cylindropuntia imbricata (Haw.) F. M. Kunth. Tree Cholla. CalPhotos. Jepson eFlora. SEINet Taxon.
- Grampsas North Open Space (City of Golden), 4312. 7/25/2025. .
- Heritage Dells, Middle Gulch, 4516. 4/9/2026. .
- South Table Mountain Open Space (City of Golden),
6018.
5/13/2026.
.
.
 Obs. No. 4312, Cylindropuntia imbricata. |
Echinocereus viridiflorus Engelm. (Syn: Echinocereus chloranthus (Engelm.) J.N.Haage , Echinocereus viridiflorus Engelm. var. chloranthus (Engelm.) Backeb. ) Nylon Hedgehog Cactus. CalPhotos. Jepson eFlora. SEINet Taxon.
- Grampsas North Open Space (City of Golden), 4287. 7/25/2025. .
- Parfet Open Space (City of Golden), 4167. 6/1/2025. .
- Schweich Hill, Tom Schweich 1521. 3/27/2017. .
- Stonebridge Homeowners Association,
Tom Schweich 3297.
6/21/2023.
.
.
Escobaria missouriensis (Sweet) D.R.Hunt. (Syn: Coryphantha missouriensis (Sweet) Britton & Rose ) Missouri Foxtail Cactus. CalPhotos. Jepson eFlora. SEINet Taxon.
- Eagle Ridge, Tom Schweich 3177. 5/28/2023. .
- Magic Mountain Archeological Site, three plants, one with four stems. Tom Schweich 1593. 4/18/2018. .
- North Hogback Open Space (City of Golden), Tom Schweich 1718. 6/14/2019. .
- North Table Mountain Open Space (City of Golden), Between 3 rocks on toe of landslide, lowest southwest slope. Tom Schweich 1582. 3/14/2018. .
- Schweich Hill, Tom Schweich 1519. 3/27/2017. One stem, another with 2 stems 1 m. sw, another with a double stem 1 m. e. Tom Schweich 1601. 4/28/2018. One stem, another with a double stem 1 m. s. Tom Schweich 1602. 4/28/2018. Complex of stems. Tom Schweich 1603. 4/28/2018. Two stems. Tom Schweich 1604. 4/28/2018. Tom Schweich 1836. 5/12/2020. Tom Schweich 1837. 5/12/2020. .
- Tripp Ranch Meadow Open Space,
2770.
6/10/2022.
.
.
Escobaria vivipara (Nutt.) Buxb. (Syn: Coryphantha vivipara (Nutt.) Britton & Rose , Escobaria vivipara (Nutt.) Buxb. var. deserti (Engelm.) D. R. Hunt , Escobaria vivipara (Nutt.) Buxb. var. rosea (Clokey) D. R. Hunt ) Beehive Cactus. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Hogback Open Space (City of Golden), 3 large stems 4265. 7/20/2025. just on the east side of the spine of the ridge. Tom Schweich 2011. 9/17/2020. Tom Schweich 2473. 4/26/2022. .
- Schweich Hill, in mowed area Tom Schweich 1548. 5/2/2017. Determination tentative. Tom Schweich 1785. 8/30/2019. .
- Stonebridge Homeowners Association,
Tom Schweich, with Ann Norton 2217.
6/12/2021.
.
.
Opuntia macrorhiza Engelm. Western Pricklypear. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial cactus, not distinctly mat-forming; Stem, segments, 90 mm. × 60 mm. wide, flattened, bluish-green, areoles, #5-6 per diagonal row, spaced 8-14 mm., proximal, glochids only, distal, glochids and spines, spines, #2, #1, 28 mm., erect, brown to tan at tip, #1, 12 mm., recumbent, nearly white; Flowers, petals, 36 mm. × 22 mm. wide, wedge-shaped, color yellow; Stamens, many, 18 mm., yellow; Style, 20-24 mm., stout; Stigma, lobes, #6-8, 3 mm.; Fruit, 38 mm. × 17 mm. wide, narrow at base, fleshy, green, areoles, mix of glochids and short spines. (Described from Coll. No. 1948, 15 June 2018.)
- Cressmans Gulch, 4575. 4/15/2026. .
- Cottonwood Natural Area, 3948. 12/27/2024. .
- Grampsas North Open Space (City of Golden), 3908. 12/7/2024. .
- Kinney Run South, 4470. 4/9/2026. .
- Parfet Open Space (City of Golden), 4104. 6/1/2025. .
- Heritage Dells, North Gulch, 4617. 4/23/2026. .
- Heritage Dells, South Gulch, 6126. 6/1/2026. .
- Magic Mountain Archeological Site, 4364. 7/30/2025. .
- North Hogback Open Space (City of Golden), Tom Schweich 1706. 6/14/2019. .
- Parfet Prehistoric Preserve, 4035. 5/12/2025. .
- Schweich Hill, Tom Schweich 1540. 5/2/2017. West-central portion of parcel, likely in the revegetated area, but unlikely to be a revegetated species. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1948. 15 Jun 2018. ( KHD00069598‡ ) .
- South Table Mountain Open Space (City of Golden), South facing slope near mesa highpoint; with Opuntia polyacantha. South Table Mountain; a lava capped mesa in the Denver Formation. 13N 0481997E 4400399N. Loraine Yeatts 686. 11 Jul 1983. ( COLO00210666‡ KHD19266‡ ) . [ KHD19266 is determined O. macrorhiza, whereas COLO401000 is determined O. pheacantha. ]
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2294. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 Tom Schweich, with Ann Norton 2218. 6/12/2021. .
- Tripp Ranch Meadow Open Space, 2778. 6/10/2022. .
- Tucker Gulch (lower), determination tentative Tom Schweich 2905. 7/6/2022. .
- Welch Ditch (Open Space),
4704.
4/25/2026.
.
.
 Coll. No. 2371, Opuntia macrorhiza |
 Opuntia macrorhiza on Schweich Hill. |
 Obs. No. 1540, Opuntia macrorhiza |
 Coll. No. 1948, Opuntia macrorhiza |
Opuntia polyacantha Haw. Plains Pricklypear. CalPhotos. Jepson eFlora. SEINet Taxon.
- Deadman Gulch, East-facing grassy slope. Deadman Gulch is often referred to by the locally euphemistic name of “Kinney Run.” High plains between US Hwy 6 and Lookout Mountain, about 220 m. northwest of the Deadman Gulch undercrossing of US Hwy 6, 2.3 km. south of the GNIS location of Golden. Tom Schweich 1428. 15 Jun 2016. ( KHD00064000‡ ) .
- Kinney Run South, 3985. 1/3/2025. .
- Parfet Open Space (City of Golden), 4153. 6/1/2025. .
- Heritage Dells, South Gulch, 6153. 6/1/2026. .
- Magic Mountain Archeological Site, 4365. 7/30/2025. .
- North Hogback Open Space (City of Golden), generally seen on the west slope from the spine of the ridge down to about mid-slope. Tom Schweich 2010. 9/17/2020. .
- North Table Mountain Open Space (City of Golden), 4211. 6/23/2025. .
- Schweich Hill, Determination tentative Tom Schweich 1503. 3/27/2017. Tom Schweich 1571. 6/16/2017. .
- South Table Mountain Open Space (City of Golden), 6006. 5/13/2026. 6057. 5/13/2026. .
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2295. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 Tom Schweich, with Ann Norton 2219. 6/12/2021. .
- Tripp Ranch Meadow Open Space,
2788.
6/10/2022.
.
.
Pediocactus simpsonii (Engelm.) Britton & Rose. (Syn: Echinocactus simpsonii Engelm. , Pediocactus simpsonii (Engelm.) Britton & Rose var. minor (Engelm.) Cockerell ) Mountain Ball Cactus. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Hogback Open Space (City of Golden),
Tom Schweich 1730.
6/14/2019.
.
Campanulaceae
Campanula glomerata L. Dane's Blood. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, 40-50 cm., spreading by underground stems; Leaves, basal, withered at anthesis, cauline, alternate, sessile, lanceolate-oblong, 110 mm. × 41 mm. wide, reduced above, setose, crenate; Inflorescence, appears head-like, but flowers in crowded axils subtended by a reduced leaf 35 mm. × 20 mm. wide; Bract, leaf-like, 6 mm. × 2 mm. wide, triangular, strigose, crenulate, ciliate; Calyx, tube 4 mm. + lobes 7 mm., narrowly acuminate, sparsely ciliate; Hypanthium, 3.5 mm.; Corolla, tube 11 mm. + lobes 5 mm., color purple; Stamens, #5, included; Filaments, scale-like, white, hairy; Anthers, 4 mm., yellow. Ovary, inferior; Style, 12 mm.; Stigma, 3-lobed (Described from Coll. No. 1982, 15 July 2018).
- Schweich Hill,
Garden escapee from the front yard of 633 Alaska Street, where this plant is cultivated in the front yard.
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.73 km. north northeast of the GNIS location of Golden. Along the north fence.
Tom Schweich 1982.
15 Jul 2018.
(
CS
JCOS s.n.
KHD00069226‡
)
Garden escapee from the front yard of 633 Alaska Street, where this plant was cultivated in the front yard.
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.73 km. north northeast of the GNIS location of Golden. Along the north fence.
Tom Schweich 2195.
5 Aug 2019.
(
CDA0052310‡
COLO2434587‡
)
.
.
 Coll. No. 1982, Campanula glomerata |
 Leaves of Campanula glomerata “Dane's Blood” |
 Landscape that includes Campanula glomerata |
 Coll. No. 1982, Campanula glomerata |
Campanula petiolata A. DC. (Syn: Campanula rotundifolia L. ) Western Harebell. CalPhotos. Jepson eFlora. SEINet Taxon.
- Grant Terry Open Space, iNaturalist Observation 345032962. micaylawerner 5935. 4/29/2025. . .
Campanula rapunculoides L. Rampion Bellflower. CalPhotos. Jepson eFlora. SEINet Taxon.
- Welch Ditch (Open Space),
4694.
4/25/2026.
.
.
 Roots of Campanula rapunculoides |
 Coll. No. 3484, Campanula rapunculoides. |
 Coll. No. 3484, Campanula rapunculoides. |
Campanula rotundifolia L. (=Campanula petiolata A. DC.) Harebell. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 40 cm.; Leaves, basal, ?, cauline, alternate, ±lance-linear, 52 mm. × 2.5 mm. wide; Inflorescence, solitary and loose racemes; Pedicel, 9 mm.; Calyx, tube 2.5 mm. + 5 lobes 2.5 mm. = 5.0 mm.; Corolla, 13 mm, blue-purple; Capsule, nodding, 5.5 mm. × 4.5 mm. wide, opening by pores near the base. Described from Coll. No. 1246, 24 July 2015.
- North Hogback Open Space (City of Golden), Top of ridge. Tom Schweich 1738. 6/14/2019. Tom Schweich 1941. 6/12/2020. .
- North Table Mountain Open Space (City of Golden), 4203. 6/23/2025. .
- South Table Mountain Open Space (City of Golden),
A lava capped mesa, locally common but not on mesa top or other exposures.
Front Range, South Table Mountain, First major North facing gully East of castle Rock. Near head of West fork of gully North facing slope. 13N 0482060E 4400481N.
Loraine Yeatts 1471.
24 Jun 1987.
(
COLO00216457‡
KHD25150‡
)
.
 Coll. No. 2151, Campanula rotundifolia |
 Coll. No. 1246, Campanula rotundifolia |
Cannabaceae
Celtis reticulata Torr. (Syn: Celtis laevigata Willd. var. reticulata L. D. Benson ) Net-Leaved Hackberry. CalPhotos. Jepson eFlora. SEINet Taxon.
- Cressmans Gulch, 4570. 4/15/2026. .
- Eagle Ridge, Tract A, Tom Schweich 3293. 6/19/2023. .
- Grampsas North Open Space (City of Golden), 3910. 12/7/2024. 4298. 7/25/2025. .
- Parfet Open Space (City of Golden), 4169. 6/1/2025. 4257. 7/16/2025. .
- South Illinois Open Space, 3938. 12/20/2024. .
- North Hogback Open Space (City of Golden), Tom Schweich 1732. 6/14/2019. Mixed foothills grassland and shrubland, shrub density increasing above, also collected here: Rhus trilobata, Gutierrezia sarothrae, Tragia ramosa, Eriogonum alatum, and Grindelia squarrosa. Northwesternmost city limits of Golden, west side of Dakota Ridge (North Hogback), base of a rock outcrop, about 2/3 of the way up the west slope from Cressmans Gulch, 2.67 km. north northwest of the GNIS location of Golden. Tom Schweich 2402. 29 Jul 2020. ( COLO2433829‡ OBI149100‡ ) .
- Schweich Hill, Determination tentative, made from unique leaf galls. Tom Schweich 1534. 3/27/2017. Just off the top of the hill to the south. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1798. 6 May 2018. ( KHD00069131‡ UCR ‡ ) .
- South Table Mountain Open Space (City of Golden), 6015. 5/13/2026. .
- Stonebridge Homeowners Association,
Tom Schweich 3253.
6/13/2023.
.
.
Humulus lupulus L. Common Hops. CalPhotos. Jepson eFlora. SEINet Taxon.
- Eagle Ridge,
With Cercocarpus montanus and Ribes cereum, twining on Cercocarpus montanus.
Nomenclature per FNANM. This area was collected by Handsford T. Shacklette (27 Jun 1959, 24 vouchers at COLO), but Humulus was not among his collections.
In a pit of a former mine on the east side of the locally named “Eagle Ridge,” 400 m. west of the intersection of US Highway 6 and Heritage Road, 3.76 km. south of the GNIS location of Golden.
Tom Schweich 2419.
17 Aug 2020.
(
COLO2433951‡
KHD00072971‡
)
Partially filled in clay mine pit, growing from the soil in the pit up the southwest wall. Also collected here Clematis ligusticifolia and C. orientalis.
Mailed to: Joshua Havill, 411 Borlaug Hall, 1991 Upper Buford Circle, St. Paul, MN 55108
On a small hogback informally named “Eagle Ridge,” 3.7 km. south of the GNIS location of Golden. Partially filled-in clay mine pit near top of ridge.
Tom Schweich 2444.
17 Oct 2020.
(
Mailed.
)
.
.
 Coll. No. 2419, Humulus lupulus |
 Coll. No. 3204, Humulus lupulus. |
 Coll. No. 3209, Humulus lupulus. |
Humulus neomexicanus (A. Nelson & Cockerell) Rydb. New Mexican Hops. CalPhotos. Jepson eFlora. SEINet Taxon.
- Deadman Gulch, Also seen or collected here: Crataegus succulenta, Prunus americana, Epilobium hirsutum, and Arctium minus. Nomenclature per FNANM. In a small wetland in Deadman Gulch about mid-way between Kinney Run and Apex Park, 2.37 km. south of the GNIS location of Golden. Tom Schweich, with Susan Panjabi and Zachariah Wilson 2417. 11 Aug 2020. ( COLO2434512‡ CS198693‡ KHD00072970‡ OBI186040‡ ) .
- Kinney Run, Beside the Kinney Run Trail. Tom Schweich, with Cynthia Hastings. 3559. 5/31/2024. Tom Schweich, with Suzy Stutzmann 2963. 3/30/2023. .
- Magic Mountain Archeological Site, 4363. 7/30/2025. .
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2296. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 .
- Welch Ditch,
Nearly all above the flume, small amount below, with Clematis ligusticifolia, Ribes cereum, Holodiscus dumosus, and Brickellia californica.
GPS coordinates place collection on the Peaks to Plains Trail about 25 m. southwest of actual location, perhaps because of the steepness of the cliffs here. One of three collections made along the Welch Ditch on this date.
Mouth of Clear Creek Canyon, hill side of Welch Ditch, near junction of climbing access trail and at a gate formerly used to close access to the trail, 3.39 km. (geodesic) west of the GNIS location of Golden.
Tom Schweich 3199.
29 Aug 2023.
(
JCOS s.n.
KHD 87493‡
OBI
UCR307018‡
)
Sunny southwest-facing site, upper side of the flume, in a small steep gulch, with Holodiscus dumosus, and Cercocarpus montanus.
Mouth of Clear Creek Canyon, beside the flume of the Welch Ditch, 2.53 km. (geodesic) west southwest of the GNIS location of Golden.
Tom Schweich 3200.
29 Aug 2023.
(
CAS718154‡
CDA56593‡
)
Upper side of flume, wetter site, edge of Douglas fir and water birch.
GPS coordinates inaccurate due to cliffs in the canyon; actual location about 80 meters to the northeast. One of three collections of hops made along the ditch this day.
Mouth of Clear Creek Canyon, along the Welch Ditch in a small steep gulch, 2.55 km. (geodesic) west southwest of the GNIS location of Golden.
Tom Schweich 3201.
29 Aug 2023.
(
COLO
CS202194‡
JCOS s.n.
KHD 87494‡
OBI
REGIS s.n. Error 14.6(b)-7c
UCR308525‡
)
Combined with 3199, repeat for larger leaves.
Tom Schweich 3205.
30 Aug 2023.
(
Undist.
)
.
Caprifoliaceae
Dipsacus fullonum L. Fuller's Teasel. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon.
- Magic Mountain Archeological Site,
4353.
7/30/2025.
.
.
 “Fuller's Teasel” at Tin Cup Ridge, Coll. No. 2677. |
 Coll. No. 2677, Dipsacus fullonum |
Dipsacus laciniatus L. Cutleaf Teasel. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon.
- Cressmans Gulch, 4550. 4/15/2026. .
- Kinney Run, In a thicket of Rhus trilobata; also seen or collected nearby: Elaeagnus angustifolia, and Acer negundo. Colorado Noxious Weed List B. West side of Kinney Run between the creek and the houses of Stonebridge HOA, between Deadman Gulch and Tripp Ranch, 2.45 km. south of the GNIS location of Golden. Tom Schweich 2412. 31 Jul 2020. ( CAS COLO2433928‡ REGIS UC ) .
- North Hogback Open Space (City of Golden),
Also collected here: Chenopodium album and Physalis longifolia.
D. laciniatus is more common in Golden than D. fullonum, both of which are Colorado Noxious Weed List B weeds.
Northwestern-most Golden, in the pit of a former clay mine, accessed by way of the City of Golden Cressman Gulch Trail and then a social/game trail, 4.19 km. north northeast of the GNIS location of Golden.
Tom Schweich 2395.
29 Jul 2020.
(
CDA0053766‡
CS
KHD00072979‡
OBI149337‡
UCR
)
.
.
 Coll. No. 2412, Dipsacus laciniatus, imaged by COLO. |
Lonicera tatarica L. Tatarian Honeysuckle. CalPhotos. Jepson eFlora. SEINet Taxon.
Shrub to small tree, 2 m.; Leaves, opposite, 24 mm. × 17 mm. wide, simple, entire, petiole, 1.5 mm.; Peduncle, 10-13 mm.; Flowers, in pairs, subtended by bracts, bisexual; Bracts, small, at base of calyx; Calyx, tube 2.0 mm. + lobes 0.5-1.0 mm.; Corolla, tube 12.5 mm. + lobes 12 mm., pink, hairy inside; Ovary, inferior; Stamens, #5, exserted, versatile; Style, #1, exserted, hairy; Stigma, capitate. Disturbed places, native to Siberia, sporadic escapee from cultivation, berries possibly toxic. (Described from Coll. No. 1591, 2 May 2017.)
- Cressmans Gulch, 4573. 4/15/2026. bottom of gulch Tom Schweich 3557. 15 Apr 2026. ( Undist. ) .
- Kinney Run, 4446. 3/30/2026. .
- Schweich Hill, Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Hughway 93 and Washington Avenue. Several plants near the east end of the parcel, close to North Ford Street. Tom Schweich 1591. 2 May 2017. ( CDA0050066‡ COLO2299733‡ CS KHD00065386‡ ) Same plant as Coll. No. 1591. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue. Several plants near the east end of the parcel, close to North Ford Street. Tom Schweich 1705. 14 Jul 2017. ( CS KHD00065388‡ ) .
- Welch Ditch (Open Space),
4687.
4/25/2026.
.
.
 Coll. No. 1591, Lonicera tatarica |
 Coll. No. 2501, Lonicera tatarica |
 Coll. No. 3017, Lonicera tatarica. |
 Coll. No. 1591, Lonicera tatarica |
 Coll. No. 1705, Lonicera tatarica |
Symphoricarpos Duhamel. Snowberry. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Table Mountain Open Space (City of Golden), 4405. 9/18/2025. .
- South Table Mountain Open Space (City of Golden), 6020. 5/13/2026. . .
Symphoricarpos occidentalis Hook. Western Snowberry. CalPhotos. Jepson eFlora. SEINet Taxon.
Woody perennial to 50 cm., forming dense colonies in moist open swales, [spreading by long sparsely-branched rhizomes,] Twigs without lenticels, minutely hairy when young; Leaves opposite, ovate, to 7 cm. × 5 cm. wide, reduced above, thick, approaching leathery, pinnately veined, upper surface glabrous, lower few short white hairs, margin slightly wavy, slightly rolled under, sparsely curved hairy; Petioles to 7 mm.; Inflorescence axillary (and terminal?); Floral bracts triangular, 3 mm.; Flowers in dense axillary clusters, bisexual, ±radial, possibly slightly bilateral, 2 or more whorls; Corolla fused at base, tube 2-3 mm., throat with recurved hairs, lobes 5, 2.0-3.5 mm, slightly longer than tube, hairy within at level of stamen insertion, white with magenta mottling; Stamens 5, alternate, exserted or barely exserted; Filaments, 3.3-3.6 mm., tapered; Anthers versatile; Ovary inferior Pistil 1; Style exserted or barely exserted; Stigma entire; Fruit a berry, green when young, mature color and size unknown. (Described from specimen seen on Green Mountain, 2 August 2014 and Coll. No. 1252, 26-Jul-2015).
- Parfet Open Space (City of Golden), 4249. 7/16/2025. .
- Heritage Dells, North Gulch, 4604. 4/23/2026. .
- Kinney Run, 6268. 7/9/2026. .
- Tripp Ranch Meadow Open Space, 2773. 6/10/2022. .
- Welch Ditch (Open Space),
4689.
4/25/2026.
4746.
4/25/2026.
.
.
Symphoricarpos rotundifolius A. Gray. (Syn: S. oreophilus A. Gray , S. rotundifolius A. Gray var. parishii (Rydb.) Dempster , S. rotundifolius A. Gray var. rotundifolius , S. vaccinioides Rydb. ) Roundleaf Snowberry. CalPhotos. Jepson eFlora. SEINet Taxon.
Shrub, to 70 cm.; Leaves, opposite, 12 mm. × 9 mm. wide, ovate, margin entire; Inflorescence, terminal racemes on short branches; Calyx, 1.5 mm.; Corolla, tube 10 mm. + lobes 1.7 mm., color ochroleucus, few hairs near base of tube (around the style); Stamens, #5; Filaments, free 2 mm.; Ovary, inferior; Style, 3.5 mm., glabrous; Fruit, berry, white. Described from Coll. No. 1654, 1 Jun 2017.
- Cressmans Gulch, 4562. 4/15/2026. .
- Parfet Open Space (City of Golden), determination tentative 4115. 6/1/2025. .
- Kinney Run, several bushes between Illinois Street Trail and creek. 4435. 3/30/2026. .
- Parfet Prehistoric Preserve, 4048. 5/12/2025. .
- South Table Mountain Open Space (City of Golden), In West facing gully, locally common on sids of and in gully a lava capped mesa in the Denver Formation. South of Castle Rock. 13N 0482044E 4400232N. Loraine Yeatts 902. 6 Jun 1984. ( KHD20413‡ ) .
- Stonebridge Homeowners Association,
Determined by later survey with Ann Norton.
Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2297.
7/24/2020.
Sovell, John R., and Susan S. Panjabi, 2021
Tom Schweich, with Ann Norton 2220.
6/12/2021.
.
Caryophyllaceae
Cerastium arvense L. ssp. strictum Gaudin. (Syn: Cerastium strictum L ) Field Chickweed. CalPhotos. Jepson eFlora. SEINet Taxon.
Common early-flowering perennial, to 20 cm.; Leaves, opposite, broadly linear, 15 mm. × 3 mm. wide, stipules absent, tufts of leaves in lower axils; Sepals free; Petals >> sepals, white, notched; Styles (4)5.
- Heritage Dells, North Gulch, 4643. 4/23/2026. .
- Heritage Dells, South Gulch, 4501. 4/9/2026. .
- Kinney Run, 40 m. east of and above the Kinney Run Trail, in the sandstone of a hogback, at the base of Cercocarpus montanus, which itself was rooted in a fracture of the bedrock, 3.22 km. south of the GNIS location of Golden. Tom Schweich 1780.1 12 Apr 2018. ( COLO02348076‡ ) .
- Magic Mountain Archeological Site, Open Ground. Ernest H. Brunquist 89. 27 May 1960. ( CS37644‡ ) Tom Schweich 1645. 4/18/2018. Heritage Dells area, 41 m. east of the Kinney Run Trail, in thin soil on top of a very low hogback, 4.3 km. south of the GNIS location of Golden Tom Schweich 1786. 18 Apr 2018. ( COLO02348043‡ UCR ‡ ) .
- North Hogback Open Space (City of Golden), Tom Schweich 1746. 6/14/2019. Southwest-facing slope, with Artemisia ludoviciana, Linum lewisii, and Grindelia squarrosa. Southern end of the hogback in northernmost Golden, 4.16 km. north northwest of the GNIS location of Golden. Tom Schweich 2265. 9 May 2020. ( OBI149330‡ REGIS UCR ) .
- North Table Mountain Open Space (City of Golden), 4432. 3/26/2026. .
- Schweich Hill, in bloom Tom Schweich 3551. 4/30/2024. .
- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2221. 6/12/2021. .
- Tripp Ranch Meadow Open Space,
2781.
6/10/2022.
.
.
Gypsophila paniculata L. (Syn: G. paniculata L. var. p. ) Baby's Breath. Weed: CO DofA, List: Watch. CalPhotos. Jepson eFlora. SEINet Taxon.
- Schweich Hill,
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden.
Tom Schweich 1666.
16 Jun 2017.
Colorado Noxious Weed Watch List.
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue. Northwest central part of parcel, off the top of the hill, getting close to the neighbors' fences.
Tom Schweich 1710.
14 Jul 2017.
(
KHD00065586‡
UCR ‡
)
.
.
 Coll. No. 1710, Gypsophila paniculata |
Saponaria officinalis L. Bouncingbet. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon.
- Schweich Hill, Tom Schweich 1577. 7/14/2017. .
- Tucker Gulch (lower),
iNaturalist Observation 187022544.
Tom Schweich 3464.
10/9/2023.
iNaturalist Observation 187024275.
Tom Schweich 3465.
10/9/2023.
.
.
 Saponaria officinalis |
Silene latifolia Poir. (Syn: Lychnis alba Mill. , Melandrium dioicum (L.) Cosson & Germain ) Bladder Campion. CalPhotos. Jepson eFlora. SEINet Taxon.
- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2222. 6/12/2021. .
- Welch Ditch,
Inside and beside the former Welch Ditch, south side of Clear Creek, just inside the mouth of Clear Creek Canyon, 2.19 km. west southwest of the GNIS location of Golden.
Tom Schweich 2317.
3 Jun 2020.
(
CAS
CDA0053748‡
JCOS s.n.
KHD00072987‡
)
.
.
 Coll. No. 2127, Silene latifolia |
 Flower of Coll. No. 2127, Silene latifolia |
Stellaria media (L.) Vill. (Syn: Alsine media L. ) Common Chickweed. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual; Stem decumbent, internode hairs in a line; Stipules 0; Sepals ąfree, 4 mm, 6 mm in fruit, glandular-hairy, margins translucent; Flower white, petals present, 2-lobed, ~ź to base; Fruit spheric (Described from Collection No. 804, 4-Apr-2012).
- Schweich Hill,
in mowed area
Tom Schweich 1546.
5/2/2017.
.
 Coll. No. 804, Stellaria media |
Chenopodiaceae
Atriplex canescens (Pursh) Nutt. Four-wing Saltbush. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Open Space (City of Golden), With Artemisia ludoviciana, Kraschinnikovia lanata, and Bromus inermis. Additional plants about 66 m. east on CDOT right of way. This parcel was designated a City of Golden Open Space in 2025. Slope above right bank of Welch Ditch, 955 m. southwest of the GNIS location of Golden. Tom Schweich 3518. 11 Sep 2025. ( CAS ) .
- Parfet Prehistoric Preserve, 3991. 4/30/2025. 4041. 5/12/2025. 4042. 5/12/2025. 4045. 5/12/2025. reddish 4046. 5/12/2025. .
- South Table Mountain Open Space (City of Golden),
6023.
5/13/2026.
SW facing steep slope below cliff forming edge of mesatop, occassional.
South Table Mountain. 13N 0482030E 4400462N.
Peter G. Root 8312.
1 Jul 1983.
(
KHD20624‡
)
.
.
 Coll. No. 3518, Atriplex canescens. |
 Coll. No. 3369, Atriplex canescens. |
 Detail of Coll. No. 721, Atriplex canescens var. canescens |
Bassia scoparia (L.) A. J. Scott. (Syn: Bassia sieversiana (Pall.) W. A. Weber , Chenopodium scoparia L., Sp. Pl.: 221 (1753) , Kochia scoparia (L.) Schrad. ) Kochia, Summer Cypress. CalPhotos. Jepson eFlora. SEINet Taxon.
- Magic Mountain Archeological Site,
Growing unshaded in disturbed ground.
T4N R70W S10. 13N 0481886E 4396586N.
Ernest H. Brunquist 68.
23 Sep 1959.
(
CS37487‡
KHD10607‡
)
.
.
 Habit of Coll. No. 2577, Kochia scoparia |
 Coll. No. 2577, Kochia scoparia |
 Coll. No. 2754, Kochia scoparia |
 Inflorescence of Coll. No. 2577, Kochia scoparia |
Chenopodium album L. Lambsquarters. CalPhotos. Jepson eFlora. SEINet Taxon.
- Grampsas North Open Space (City of Golden), 4297. 7/25/2025. Dense stand of Ericameria nauseosa var. graveolens with Ambrosia psilostachya, Physalis hederifolia, and Bromus japonicus. This area was designated a City of Golden open space in 2025. Northern portion of the Tony Grampsas Memorial Sports Complex, flat field, southeast side of North Table Mountain, 4.10 km. (geodesic) northeast of the GNIS location of Golden. Tom Schweich 3529. 15 Sep 2025. ( OBI ) .
- Parfet Open Space (City of Golden), 4129. 6/1/2025. .
- Heritage Dells, North Gulch, 4603. 4/23/2026. .
- Heritage Dells, South Gulch, 6131. 6/1/2026. .
- North Hogback Open Space (City of Golden), Top of a waste pile. Also collected here or nearby: Dipsacus laciniatus and Physalis longifolia. Northwestern-most Golden, in the pit of a former clay mine, accessed by way of the City of Golden Cressman Gulch Trail and then a social/game trail, 4.28 km. north northeast of the GNIS location of Golden. Tom Schweich 2396.1 29 Jul 2020. ( CAS CDA0053767‡ COLO2433860‡ UC ) .
- Parfet Prehistoric Preserve, 4044. 5/12/2025. .
- Schweich Hill, East end of parcels, adjacent to social trail over top of hill. Var. album if infraspecific names are to be applied. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1750. 31 Aug 2017. ( KHD00065155‡ UCR ‡ ) .
- Stonebridge Homeowners Association, Tom Schweich 3254. 6/13/2023. .
- Welch Ditch (Open Space),
4734.
4/25/2026.
.
.
 Coll. No. 1750, Chenopodium album |
 Coll. No. 3203, Chenopodium album. |
 Coll. No. 1750, Chenopodium album |
Chenopodium atrovirens Rydb. Pinyon Goosefoot. CalPhotos. Jepson eFlora. SEINet Taxon.
- Magic Mountain Archeological Site, open gnd ca 2 1/2 mi S of Golden. T R70W S10. Ernest H. Brunquist 71. 26 Sep 1959. ( CS37493‡ ) . .
Krascheninnikovia lanata (Pursh) A. D. J. Meeuse & Smit. (Syn: Diotis lanata Pursh , Eurotia lanata (Pursh) Moquin-Tandon ) Winter Fat. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Open Space (City of Golden),
Four or five shrubs in immediate area.
iNaturalist Observation 254249441.
3898.
12/5/2024.
4397.
9/11/2025.
Mixed-grass prairie with Ericameria nauseosa varieties nauseosa and graveolens.
Designated a City of Golden open space in July 2025.
Western part of open space above the Welch Ditch, 1.09 km. southwest of the GNIS location of Golden.
Tom Schweich 3447.
7 Jul 2025.
(
COLO
CS
FLD
REGIS
)
Also here: Juniperus virginiana, Ericameria nauseosa var. nauseosa, Gutierrezia sarothrae, Elaeagnus angustifolia, Oenothera howardii, Andropogon gerardii, Bouteloua curtipendula, and Nassela viridula.
This parcel was designated a City of Golden open space in 2025.
North-facing slope between Parfet Estates and US Highway 6, about mid-slope between the Welch Ditch and the houses, 1.1km. (geodesic) southwest of the GNIS location of Golden.
Tom Schweich, with Nico Albaladejo 3487.
15 Aug 2025.
(
KHD
)
.
.
Salsola tragus L. (Syn: S. australis R. Brown , S. iberica (Sennen & Pau) Botschantzev ex Czerepanov , S. kali , S. kali var. tenuifolia Tausch. , S. pestifer Nels. ) Tumbleweed. CalPhotos. Jepson eFlora. SEINet Taxon.
- Magic Mountain Archeological Site,
open disturbed gnd along stream bed.
ca 2 1/2 mi S of Golden. T4N R70W S10.
Ernest H. Brunquist 58.
23 Sep 1959.
(
CS37480‡
)
.
 Red-flowered variant of tumbleweed (Salsola tragus L.) |
 Flowers of red-flowered variant of tumbleweed (Salsola tragus L.) |
 Coll. No. 3197, Salsola tragus. |
Cleomaceae
Cleome serrulata Pursh. (=Cleomella serrulata (Pursh) Roalson & J. C. Hall) Rocky Mountain Beeplant. CalPhotos. Jepson eFlora. SEINet Taxon.
- Grant Terry Open Space, iNaturalist Observation 306860015. abyssal 5878. 8/16/2025. iNaturalist Observation 306842853. maryadams 5877. 8/16/2025. . .
Cleomella serrulata (Pursh) Roalson & J. C. Hall. (Syn: Cleome serrulata Pursh , Peritoma serrulata (Pursh) DC. ) Rocky Mountain Bee Plant. CalPhotos. Jepson eFlora. SEINet Taxon.
- Tucker Gulch (lower),
Tom Schweich 983.
8/10/2014.
.
.
 Coll. No. 3196, Cleomella serrulata. |
Polanisia dodecandra (Linnaeus) de Candolle. Sandyseed Clammyweed. CalPhotos. Jepson eFlora. SEINet Taxon.
- Grant Terry Open Space, iNaturalist Observation 306844061. maryadams 5881. 8/16/2025. iNaturalist Observation 172254198. riley_sundberg 5880. 7/10/2023. iNaturalist Observation 93589775. thecaiman1 5879. 9/4/2021. .
Convolvulaceae
Convolvulus arvensis L. Field Bindweed. Weed: CO DofA, List: C. CalPhotos. Jepson eFlora. SEINet Taxon.
- Cressmans Gulch, 4548. 4/15/2026. .
- Heritage Dells, North Gulch, 4613. 4/23/2026. .
- Heritage Dells, South Gulch, 6116. 6/1/2026. .
- Kinney Run, Tom Schweich 1638. 7/6/2018. .
- North Hogback Open Space (City of Golden), Tom Schweich 1728. 6/14/2019. .
- Parfet Prehistoric Preserve, 4036. 5/12/2025. .
- Schweich Hill, Colorado Noxious Weed List C. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1672. 16 Jun 2017. ( CDA0050016‡ KHD00065484‡ ) .
- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2223. 6/12/2021. .
- Tripp Ranch Meadow Open Space, 2755. 6/10/2022. .
- Welch Ditch (Open Space),
4698.
4/25/2026.
.
.
 Habitat of Coll. No. 1220, Convolvulus arvensis |
 Coll. No. 1220, Convolvulus arvensis |
Evolvulus nuttallianus Roem. & Schult. (Syn: E. argenteus Pursh [illeg.] , E. pilosus Nutt. ) Shaggy Dwarf Morning Glory. CalPhotos. Jepson eFlora. SEINet Taxon.
First described by Pursh from a Nuttall collection on the Missouri River as E. argenteus [illeg.]
- Schweich Hill,
Top of hill, north side of social trail.
Tom Schweich, with Margaret Henderson and Nancy von Burske 2319.
6 Jun 2020.
(
KHD00070975‡
)
.
Cornaceae
Cornus sericea L. (Syn: Swida sericea (L.) Holub. ) Creek Dogwood. CalPhotos. Jepson eFlora. SEINet Taxon.
- Cressmans Gulch, Gray bark, determination tentative. 4545. 4/15/2026. .
- Kinney Run, probable garden escapee Tom Schweich, with Suzy Stutzmann and Laurel Starr. 2965. 3/30/2023. . .
Cornus sericea L. ssp. sericea. (Syn: C. stolonifera Michaux ) Creek Dogwood. CalPhotos. Jepson eFlora. SEINet Taxon.
- Heritage Dells, Middle Gulch,
4518.
4/9/2026.
.
 Coll. No. 3401, Cornus sericea ssp. sericea. |
 Coll. No. 698, Cornus sericea ssp. sericea |
Crassulaceae
Sedum lanceolatum Torr. (Syn: Amerosedum lanceolatum (Torr.) A. Löve & D. Löve ) Spearleaf Stonecrop. CalPhotos. Jepson eFlora. SEINet Taxon.
Type collected by Edwin James on the Long Expedition, described by Torrey, 1827.
- Magic Mountain Archeological Site, 4351. 7/30/2025. Tom Schweich 1647. 4/18/2018. .
- Tripp Ranch Meadow Open Space, 2775. 6/10/2022. .
- Welch Ditch,
Also collected here: Aletes acaulis, Comandra umbellata subsp. pallida, Eriogonum umbellatum var. umbellatum, and Physocarpus monogynus.
Popular rock-climbing area with heavy daily use.
Along the former Welch Ditch, south side of Clear Creek, growing in rocks on slope above the ditch, just inside the mouth of Clear Creek Canyon, 2.58 km. west southwest of the GNIS location of Golden.
Tom Schweich 2312.3
3 Jun 2020.
(
CDA0053746‡
UC
)
.
Elaeagnaceae
Elaeagnus angustifolia L. Russian Olive. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space, 5980. 5/11/2026. .
- Cressmans Gulch, 4539. 4/15/2026. 4566. 4/15/2026. .
- Grampsas North Open Space (City of Golden), 3904. 12/7/2024. 4304. 7/25/2025. .
- Parfet Open Space (City of Golden), 4143. 6/1/2025. 4242. 7/16/2025. .
- Heritage Dells, North Gulch, 4600. 4/23/2026. .
- Kinney Run, rooted in creek 4436. 3/30/2026. Tom Schweich 1988. 7/31/2020. .
- North Hogback Open Space (City of Golden), Tom Schweich 1748. 6/14/2019. .
- North Table Mountain Open Space (City of Golden), iNaturalist Observation 185158400. Tom Schweich 3463. 9/26/2023. .
- Parfet Prehistoric Preserve, 4040. 5/12/2025. cut down, but sprouting from stumps 4055. 5/12/2025. .
- Schweich Hill, Near fence, no flower/fruit, yard debris, Castilleja, Artemisia frigida, Acroptilon. Tom Schweich 1542. 5/2/2017. Along the north fence. Spreading, one mature plant, one young plant to the west. Colorado Noxious Weed List B. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1645. 30 May 2017. ( CDA0050031‡ CS EIU KHD00065372‡ USCH80148‡ ) iNaturalist Observation 182074996. Tom Schweich 3433. 9/6/2023 11:25:00 AM. iNaturalist Observation 182073480. Tom Schweich 3436. 9/6/2023 11:13:00 AM. .
- Tucker Gulch (lower),
iNaturalist Observation 183896530.
Tom Schweich 3420.
9/18/2023.
iNaturalist Observation 183895541.
Tom Schweich 3422.
9/18/2023.
iNaturalist Observation 187026947.
Tom Schweich 3467.
10/9/2023.
iNaturalist Observation 187045055.
Tom Schweich 3468.
10/9/2023.
iNaturalist Observation 187045599.
Tom Schweich 3469.
10/9/2023.
iNaturalist Observation 187046896.
Tom Schweich 3470.
10/9/2023.
iNaturalist Observation 187047989.
Tom Schweich 3471.
10/9/2023.
.
 Coll. No. 1645, Elaeagnus angustifolia |
 Coll. No. 1437, Elaeagnus angustifolia |
Euphorbiaceae
Chamaesyce glyptosperma (Engelm.) Small. (=Euphorbia glyptosperma Engelm.) Ribseed Sand Mat. CalPhotos. Jepson eFlora. SEINet Taxon.
- Magic Mountain Archeological Site, open disturbed gnd ca 2 1/2 mi S of Golden. T R70W S10. Ernest H. Brunquist 2. 14 Aug 1959. ( CS23941‡ KHD11112‡ ) .
- South Table Mountain Open Space (City of Golden),
A lava capped mesa in the Denver Formation; occasional on bare clay soil of mesatop.
South Table Mountain. 13N 0482045E 4400439N.
Loraine Yeatts 1087.
18 Sep 1984.
(
COLO 00304329‡
KHD20731‡
)
.
.
 KHD63968 voucher of Coll. No. 1550.5, Chamaesyce glyptosperma. |
Euphorbia brachycera Engelm. (Syn: Tithymalus brachyceras (Engelm.) Small ) Horned Spurge. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial, to 25-30 cm., glabrous throughout; Stem, erect, herbaceous; Leaves, alternate, sessile, lanceolate, 16 mm. × 8 mm. wide, margin entire, tip acute, green throughout; Flowers, arranged in a cyathium, glands entire with “horns” on either side. (Described from Coll. No. 2485, 2 June 2021.)
- Deadman Gulch, Northeast-facing slope, more open stoney ground, on what appears to be a southeast to northwest trend approximating the trend of Eagle Ridge to the southeast. Above the watercourse locally named “Kinney Run,” between US Highway 6 and Eagle Ridge Drive, 110 m. northwest of Kinney Run Trail, 3.17 km. south of the GNIS location of Golden. Tom Schweich 2044.2 2 Jun 2019. ( KHD00072806‡ ) .
- South Table Mountain Open Space (City of Golden),
South Table Mountain, on mesatop along road to Castle Rock. 13E 0482045E 4400489N.
Loraine Yeatts 489.
16 May 1983.
(
KHD20702‡
)
.
.
Euphorbia dentata Michx. (Syn: Euphorbia dentata Michx. var. dentata , Pointsettia dentata (Michx.) Klotzsch & Garcke ) Toothed Spurge. CalPhotos. Jepson eFlora. SEINet Taxon.
- Magic Mountain Archeological Site,
ca 2 1/2 mi S of Golden. T R70W S10.
Ernest H. Brunquist 20.
17 Aug 1959.
(
CS23954‡
)
ca 2 1/2 mi S of Golden. T R70W S10.
Ernest H. Brunquist 29.
20 Aug 1959.
(
CS23915‡
)
.
.
 Coll. No. 2680, Euphorbia dentata. |
Euphorbia esula L. [misapplied]. (=Euphorbia virgata Engelm.) Leafy Spurge. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon.
- Cressmans Gulch, 4547. 4/15/2026. .
- Parfet Open Space (City of Golden), 4155. 6/1/2025. .
- North Hogback Open Space (City of Golden), Tom Schweich 1690. 6/14/2019. Grassy southwest facing slope. Many plants here. Colorado Noxious Weed List B. Southern end of the hogback in northernmost Golden, 4.15 km. north northwest of the GNIS location of Golden. Tom Schweich 2263. 9 May 2020. ( COLO2433738‡ CS OBI149328‡ REGIS ) Weedy place above the channel of Cressman Gulch, with non-natives Medicago sativa, Lithospermum arvense, Verbascum thapsus, Bromus inermis, and natives Linum lewisii, Lupinus argenteus, and Pediomelum tenuiflorum. Plants are growing in plastic mesh suggesting this area was subjected to revegetation in the past. Colorado Noxious Weed List B. Northwest corner of Golden, strath above Cressmans Gulch, 115 m. downstream from Pine Ridge Road, 4.46 km. northwest of the GNIS location of Golden. Tom Schweich 2473.1 25 May 2021. ( COLO2706471‡ KHD00075611‡ ) .
- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2224. 6/12/2021. .
- Tucker Gulch (lower),
Weed: CO DofA, List: B.
Disturbed area between paths, 1.33 km north northwest of the GNIS location of Golden
Tom Schweich 1331.
11 May 2016.
(
CAS
CDA0050049‡
KHD00063910‡
OBI83164‡
UC
UCR277951‡
)
.
.
 Habitat of Coll. No. 1795, Euphorbia esula |
 Coll. No. 1657, Euphorbia esula |
 Coll. No. 1733, Euphorbia esula |
 Coll. No. 2473.1, Euphorbia esula |
Euphorbia marginata Pursh. (Syn: Agaloma marginata (Pursh) A. Löve & D. Löve ) Snow on the Mountain. CalPhotos. Jepson eFlora. SEINet Taxon.
- Eagle Ridge, On mesa slope in foothills. Transferred from USGS Herbarium, Denver, CO (2005). Foothills of the Front Range, at junction of US 6 and road to Morrison, about 1 mile east of Golden. Hansford T. Shacklette 5891. 27 Jun 1959. ( COLO528846‡ ) .
- Schweich Hill, beside social trail on lower slope, probably a waif Tom Schweich 3359. 7/28/2023. . .
Euphorbia myrsinites L. (Syn: Tithymalus myrsinites (L.) Hill ) Myrtle Spurge. Weed: CO DofA, List: A. CalPhotos. Jepson eFlora. SEINet Taxon.
- Kinney Run South, 3964. 1/3/2025. .
- Parfet Open Space (City of Golden), 4262. 7/16/2025. .
- Heritage Dells, South Gulch, 4499. 4/9/2026. .
- Kinney Run, 4440. 3/30/2026. Very large patch, in backyard and spilling out into the Open Space. 4461. 3/30/2026. West-facing slope, just beginning to bloom, collection from southern edge of an infestation that extends 175 m. north along the rock outcrop. 3.31 km. south of the GNIS location of Golden. Tom Schweich 1779. 12 Apr 2018. ( CDA0052337‡ COLO02347995‡ EIU KHD00069143‡ ) .
- North Table Mountain Open Space (City of Golden), Tom Schweich 1490. 3/16/2017. .
- Parfet Prehistoric Preserve, 4012. 4/30/2025. .
- Schweich Hill, Few plants in disturbed area. Tom Schweich 1583. 3/4/2018. In mowed area of smooth brome. Northeast corner of parcels, in an area of much smooth brome that has been mowed by neighbors to the north. Tom Schweich 1745. 31 Aug 2017. ( JCOS s.n. KHD00065356‡ ) .
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2300. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 .
- Tucker Gulch (lower), iNaturalist Observation 183895948. Tom Schweich 3421. 9/18/2023. .
- Welch Ditch (Open Space),
4713.
4/25/2026.
.
.
Euphorbia peplus L. (Syn: Tithymalus peplus (L.) Hill ) Petty Spurge. CalPhotos. Jepson eFlora. SEINet Taxon.
- Kinney Run,
Accidental collection of 1 plant with Coll. No. 1827.
Tom Schweich 1672.
5/16/2018.
.
.
 Coll. No. 2931.1, Euphorbia peplus. |
Euphorbia spathulata Lam. (Syn: Tithymalus spathulata (Lam.) W. A. Weber ) Warty Spurge, Spoonleaf Spurge. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual, tap-rooted, to 25 cm., glabrous throughout; Leaves, cauline alternate, 26 mm. × 9 mm. wide, spatulate, toothed; Inflorescence, umbellate, flower a cyathium; Capsules, 2.5 mm. × 2.8 mm. wide, warty-tuberculate. Not listed as a noxious weed. (Described from Coll. No. 1388, 1 June 2016.)
- South Table Mountain Open Space (City of Golden),
South Table Mountain, below Castle Rock. 13N 0482071E 4400182N.
Loraine Yeatts 1194.
13 May 1985.
(
COLO00307405‡
KHD21726‡
)
.
.
 Inflorescence of Coll. No. 1388, Euphorbia spathulata |
 Coll. No. 1388, Euphorbia spathulata |
Tragia ramosa Torr. Branched Noseburn. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Hogback Open Space (City of Golden), Tom Schweich 1729. 6/14/2019. Tom Schweich 1985. 7/29/2020. .
- South Table Mountain Open Space (City of Golden), 6003. 5/13/2026. .
Fabaceae
Astragalus . Milkvetch. CalPhotos. Jepson eFlora. SEINet Taxon.
- Kinney Run South, 4473. 4/9/2026. .
- Schweich Hill,
Purple flower, no fruit, leaves basal, silvery hairy.
Tom Schweich 1539.
5/2/2017.
.
.
 Locoweed in the Mid Hills Campground |
Astragalus agrestis Douglas ex G. Don. Purple Milkvetch. CalPhotos. Jepson eFlora. SEINet Taxon.
Coll. No. 1398, 8 June 2016, characters observed: Perennial herb, to 15 cm., caulescent, basifixed straight appressed hairy throughout; Leaves, cauline, alternate, stipules, 5 mm., connate opposite petiole, compound, odd-pinnate, leaflets, #13, 8 mm. × 2 mm. wide, straight hairy, tip round; Inflorescence, upright ovoid cluster; Calyx, tube 4.5 mm. + lobes 3.5 mm. = 8 mm., mix of white and black hairs; Flowers, zygomorphic, 11 mm., blue-purple; Style, 7 mm., persistent; Legume, immature, 5 mm. × 1.7 mm. wide, stipe very short (0.4 mm.?), dense long straight soft hairy (Described from Coll. No. 1398, 8 June 2016).
- Parfet Open Space (City of Golden), 4149. 6/1/2025. .
- North Table Mountain Open Space (City of Golden), Trailside, in grasses, in flat area likely created by a landslide. Southwest side of North Table Mountain, along City of Golden North Table Mountain Trail, 2.3 km. north of the GNIS location of Golden. Tom Schweich 1398. 8 Jun 2016. ( JCOS s.n. KHD00063960‡ UC UCR277983‡ ) .
- Schweich Hill,
Determination tentative.
Tom Schweich 1605.
5/6/2018.
Just a few plants on the eastern slope, in dense smooth brome.
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.73 km. north northeast of the GNIS location of Golden.
Tom Schweich 1848.
18 May 2018.
(
KHD00069184‡
)
Upper eastern slope, above the thickest infestation of smooth brome, near social trail.
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.73 km. north northeast of the GNIS location of Golden.
Tom Schweich 1849.
18 May 2018.
(
UCR ‡
)
Tom Schweich 3042.
5/21/2023.
.
.
 Astragalus agrestis |
 Coll. No. 1402, Astragalus agrestis |
 Coll. No. 2989, Astragalus agrestis. |
 Coll. No. 1398, Astragalus agrestis |
Astragalus crassicarpus Nutt. Groundplum Milkvetch. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 15 cm., Leaves, compound, stipules free, petiole, 15 mm., blade, 85 mm. × 22 mm. wide, leaflets, #23, 11 mm. × 3.5 mm. wide, terminal leaflet, not a tendril, hairs, simple, appressed, straight, Calyx, tube 8 mm. + lobes 3 mm., hairs, simple, some light and some dark, Flower, zygomorphic, white to blue, banner, 24 mm., glabrous, wings, claw, 10 mm., blade, 10 mm., keel, 20 mm., tip, obtuse; Style, persistent, 8 mm.; Fruit, 17 mm. × 7.3 mm. wide, oblong, glabrous (Described from Coll. No. 1851, 18 May 2018).
- Schweich Hill,
Tom Schweich 1620.
6/15/2018.
Seen only as dried seed pods.
Tom Schweich 1786.
8/30/2019.
Only one plant found in this parcel, so far.
Top of hill, beside social trail. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden.
Tom Schweich 1851.
18 May 2018.
(
KHD00069181‡
)
Southeast side of hill, immediately adjacent to social trail.
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden.
Tom Schweich 1943.
15 Jun 2018.
(
KHD00069186‡
)
.
.
Astragalus drummondii Dougl. ex Hook. Drummond's Milkvetch. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 35 cm., caulescent; Stem, rachis, abaxial leaf surfaces, and calyx spreading hairy, hairs basifixed; Leaves, cauline, compound, odd-pinnate, stipules, 9 mm., free, entire, leaflets, 23-27, 19 mm. × 5.5 mm. wide, wavy hairy abaxially and marginally, ±glabrous adaxially; Calyx, tube 6 mm. + lobes 3 mm. = 9 mm., green at base to cream color at tube and lobes, few dark wavy hairs, persistent; Corolla, 17 mm., color cream, banner, 17 mm., wings, claw 6 mm. + blade 9 mm., tip obtuse, keel, 14 mm., tip purple, Ovary, 9 mm.; Style, 4 mm., glabrous, persistent; Fruit, stalked 12 mm. + body 26 mm. × 4 mm. wide, pendant, smooth, glabrous, not inflated. Described from Coll. No. 1141, 9 Jun 2015.
- Deadman Gulch, Open east-facing grassy slopes. Deadman Gulch is locally euphemistically known as “Kenny Run.” High plains between US Hwy 6 and Lookout Mountain, about 140 m. west of the Deadman Gulch undercrossing of US Hwy 6, 2.3 km. south of the GNIS location of Golden. Tom Schweich 1423. 15 Jun 2016. ( CAS KHD00063604‡ UC ) .
- Parfet Open Space (City of Golden), 4146. 6/1/2025. .
- North Hogback Open Space (City of Golden), Tom Schweich 1714. 6/14/2019. .
- Schweich Hill, Western portion, southwest slope. Expected because it is native to Golden, but collected in an area possibly revegetated following adjacent home construction 2006-2007. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1621. 15 May 2017. ( CDA0050096‡ CS EIU KHD00065376‡ ) .
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2301. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 Tom Schweich, with Ann Norton 2225. 6/12/2021. .
- Tripp Ranch Meadow Open Space,
2757.
6/10/2022.
.
.
 Coll. No. 1141, Astragalus drummondii |
 Flower of Coll. No. 1141, Astragalus drummondii |
 Fruit of Coll. No. 1141, Astragalus drummondii |
 Inflorescence of Coll. No. 1141, Astragalus drummondii |
Astragalus flexuosus G. Don. Flexible Milkvetch. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb,
decumbent to ascending stems,
to 30-50 cm., not vine-like, caulescent, appressed basifixed hairy throughout;
Leaves, cauline, compound, odd pinnate, leaflets ±15-17,
terminal leaflet not modified into tendril,
stipules, entire, not lobed at base,
not connate (slightly) connate on side opposite to petiole,
leaflets, 11-12 mm. × 2-4 mm. wide, oblong, notched,
terminal leaflet 7 mm. < uppermost pair 8 mm.;
Inflorescence, raceme, arising from axils;
Calyx, 4 mm., tube >> lobes,not inflated in fruit;
Flower, zygomorphic,
banner, 9 mm.,
wings (2), 9 mm.,
keel, 5.5 mm., <wings, not beaked;
Style, 3 mm., glabrous, persistent;
Fruit, 9 mm. × 4.5 mm.,
substipitate 1 mm.,
not inflated,
compression lateral
sparse appressed hairs.
Described from Coll. No. 1148, 15 Jun 2015, and Coll. No. 1384, 1 June 2016.
- Grampsas North Open Space (City of Golden), 4291. 7/25/2025. .
- Parfet Open Space (City of Golden), 4109. 6/1/2025. .
- Heritage Dells, South Gulch, 6142. 6/1/2026. .
- Schweich Hill, Top of hill, center of parcel. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1949. 17 Jun 2018. ( KHD00069187‡ ) .
- Stonebridge Homeowners Association, Tom Schweich 3255. 6/13/2023. .
- Tripp Ranch Meadow Open Space,
2758.
6/10/2022.
.
.
Astragalus laxmannii Jacq. var. robustior (Hook.) Barneby & S. L. Welsh. (Syn: Astragalus adsurgens Pall. ) Prairie Milkvetch. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 40 cm., caulescent, ascending, hairs dolabriform; Leaves, cauline, stipules, free, 12 mm., compound, petiole, 5 mm., blade, 100 mm., leaflets, #17-21, 17-21 mm. × 5 mm. wide, elliptic, tip cuspidate, terminal leaflet jointed to rachis; Inflorescence, raceme, dense, bracts, 9 mm., 30+ flowers, ascending, Calyx, tube 4.5-6 mm. + lobes 5 mm. = 11 mm., hairs, black and white, dolabriform; Flowers, 14 mm., pale blue-lavender to whitish, banner, 14 mm, wings, claw 6 mm. + blade 6 mm. keel, 11 mm.; Ovary, 4.5 mm. × 1.3 mm. wide, densely hairy, Legume, more erect than flower (Described from Coll. No. 1400, and 3261).
- North Table Mountain Open Space (City of Golden), In grasses and forbs trailside. Southwest side of North Table Mountain, along City of Golden North Table Mountain Trail, 1.9 km. north of the GNIS location of Golden. Tom Schweich 1400. 8 Jun 2016. ( JCOS s.n. KHD00063961‡ OBI108942‡ ) Grassy slopes with Prinus americana and Rhus trilobata. Southwest slopes of North Table Mountain, 2 km. north of the GNIS location of Golden. Tom Schweich, with Greg McKittrick 1443. 22 Jun 2016. ( CAS UCR278004‡ ) .
- Tripp Ranch Meadow Open Space,
Tom Schweich 3574.
6/8/2024.
.
.
 Coll. No. 3160, Astragalus laxmannii var. robustior. |
 Coll. No. 1400, Astragalus laxmannii var. robustior |
Astragalus shortianus [Nutt. ex] Torr. & A.Gray. Short's Milkvetch. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 10 cm., acaulescent; Leaves, compound, petiole, 50 mm., blade, 90 mm. × 37 mm. wide, leaflets, #13, 17 mm. × 10 mm. wide, terminal leaflet not a tendril, petiole, rachis, and leaflets with appressed stiff straight hairs; Inflorescence, not an umbel; Calyx, tube 6 mm. + lobes 4 mm., hairs similar; Flower, zygomorphic, banner 22 mm., wings 18 mm., clawed, keel, 22 mm., tip obtuse; Fruit, 35 mm. × 10 mm. wide, falcate, appressed stiff basifixed straight hairs (Described from Coll. No. 1826, 16 May 2018).
- Eagle Ridge, Tom Schweich 3040. 5/9/2023. .
- Kinney Run, 4455. 3/30/2026. 4456. 3/30/2026. 4457. 3/30/2026. Beside Kinney Run Trail, amongst Festuca saximontana Tom Schweich 1812. 4/27/2020. Three plants on a steep east-facing alluvial slope. Small hill between Kinney Run and Deadman Gulch near their junction, 2.86 km. south of the GNIS location of Golden. Tom Schweich 1826. 16 May 2018. ( COLO02347847‡ KHD00069188‡ ) .
- North Hogback Open Space (City of Golden),
Tom Schweich 2478.
4/26/2022.
.
.
 Coll. No. 1405, fragments of an Astragalus, maybe A. shortianus |
 Pieces of Coll. No. 1826, Astragalus shortianus |
Colutea arborescens L. Bladder Senna. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial shrub, to 2 m., woody below; Stem erect, unarmed; Leaves compound, odd-pinnate (with terminal leaflet); Leaflets, 11, 16 mm. × 12 mm. wide, notched at tip, glabrous above, sparsely appressed hairy below; Inflorescence a raceme, axillary, 9± flowers; Calyx, 5-merous, 5 mm. × 6 mm. dia., appressed hairy; Flowers, 19 mm., yellow, with dark markings; Banner, 10 mm.; Wings, 10 mm. × 4 mm., reduced in comparison to Lupinus; Keel, fully enclosing stamens and pistil, glabrous; Stamens, 10; Filaments, 9 fused, 1 free; Style, recurved; Fruit, inflated, bladder-like, 50 mm. × 22 mm., walls papery, color reddish fading to brown, base stalk-like; Seeds, reniform, flattened, 6 mm. × 4 mm. × 2 mm., brown, surface smooth; native to southern Europe (Described from Coll. No. 1066, 6 Oct 2014).
- Parfet Open Space (City of Golden), determination tentative 4136. 6/1/2025. 4252. 7/16/2025. .
- North Hogback Open Space (City of Golden), Many plants in and around the surge basin north of Wyoming Street at Ridge Road, 2.3 km north northwest of the GNIS location of Golden. Tom Schweich 1066. 6 Oct 2014. ( UC2045776‡ UCR266093‡ ) .
- Schweich Hill,
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue. North-central area near fence with neighbor's discarded yard waste.
Tom Schweich 1594.
2 May 2017.
(
CDA0050068‡
CS
EIU
KHD00065384‡
)
.
.
Dalea purpurea Vent. Purple Prairie Clover. CalPhotos. Jepson eFlora. SEINet Taxon.
- Stonebridge Homeowners Association,
Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2302.
7/24/2020.
Sovell, John R., and Susan S. Panjabi, 2021
.
.
 Habitat of Coll. No. 1197, Dalea purpurea |
 Inflorescence of Coll. No. 1197, Dalea purpurea |
Glycyrrhiza lepidota Pursh. American Licorice. CalPhotos. Jepson eFlora. SEINet Taxon.
- Grant Terry Open Space,
iNaturalist Observation 178388781.
golderest 5888.
8/14/2023.
iNaturalist Observation 179230816.
maryadams 5889.
8/19/2023.
iNaturalist Observation 31800320.
rtoussaint 5886.
8/30/2019.
iNaturalist Observation 60209453.
tylerweisman 5887.
9/20/2020.
.
.
 Habitat of Coll. No. 1222, Glycyrrhiza lepidota |
 Coll. No. 1222, Glycyrrhiza lepidota |
Lathyrus latifolius L. Perennial Pea Vine. Weed: CO DofA, List: Watch. CalPhotos. Jepson eFlora. SEINet Taxon.
Vine, Stem winged to 3 mm., Leaves pinnate compound, main leaf axis extended as tendril, Leaflets 2, Inflorescence of 9-11 flowers, Sepals fused at base, Flower bilateral, Corolla 20 mm., wing 33 mm. wide, Stamens 10, Filaments top free, bottom 9 fused (Described from Collection No. 884, 17 August 2012).
- Grampsas North Open Space (City of Golden), 4315. 7/25/2025. .
- Grant Terry Open Space, iNaturalist Observation 231011091. ashlee_caruana 5911. 7/22/2024. iNaturalist Observation 95441002. bretturner 5897. 9/19/2021. iNaturalist Observation 162302306. chelseasg 5900. 5/18/2023. iNaturalist Observation 50761631. danielfrank 5893. 6/23/2020. iNaturalist Observation 50761651. danielfrank 5894. 6/23/2020. iNaturalist Observation 50761660. danielfrank 5895. 6/23/2020. iNaturalist Observation 123427285. david576 5898. 6/25/2022. iNaturalist Observation 238002587. fallink 5912. 8/24/2024. Rampant along the creek. Invasive? iNaturalist Observation 224428776. geoskimom 5909. 6/21/2024. iNaturalist Observation 170471013. jmw2a 5902. 7/1/2023. iNaturalist Observation 124953070. kathy_dbg 5899. 7/5/2022. iNaturalist Observation 176802049. korinn_mallory 5905. 8/5/2023. iNaturalist Observation 180636582. kuzala 5908. 8/28/2023. iNaturalist Observation 171560540. maddie_hartlaub 5903. 7/3/2023. iNaturalist Observation 179230908. maryadams 5907. 8/19/2023. iNaturalist Observation 168387929. maxincolorado 5901. 6/19/2023. iNaturalist Observation 53278369. mcopan 5896. 7/16/2020. Tasty đ iNaturalist Observation 176991016. radlinsky 5906. 8/6/2023. iNaturalist Observation 175069305. rrmartin 5904. 7/25/2023. iNaturalist Observation 13610298. selasphorus 5890. 6/19/2018. iNaturalist Observation 30760101. sgeol 5892. 8/13/2019. iNaturalist Observation 289977748. shridley 5913. 6/15/2025. iNaturalist Observation 227604213. spydersky 5910. 7/6/2024. iNaturalist Observation 29915149. thecaiman1 5891. 7/31/2019. iNaturalist Observation 300712736. threepenpals 5914. 7/22/2025. .
- Welch Ditch (Open Space),
4706.
4/25/2026.
.
.
 Habitat of Coll. No. 884, Lathyrus latifolius |
 Coll. No. 884, Lathyrus latifolius |
 Coll. No. 3009, Lathyrus latifolius. |
 Coll. No. 3212, Lathyrus latifolia. |
Lotus corniculatus L. Bird's Foot Trefoil. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb; Leaf palmate compound; Leaflets 3, entire, not gland-dotted, length of longest upper leaflet 3.15 x width; Infloresence 5-flowered; Flower bilateral; Sepals fused 4 mm., tips 2 mm.; Corolla 10 mm.; Stamens 10, filaments of 9 fused, 10th upper free; Fruit exserted from calyx (Described from Collection No. 820, 24 May 2012).
- Kinney Run,
6265.
7/9/2026.
.
.
 Coll. No. 820, Lotus corniculatus |
Lupinus argenteus Pursh var. argenteus. Loosely Flowered Silver Lupine. CalPhotos. Jepson eFlora. SEINet Taxon.
Characters observed while keying: Perennial > 1 dm, stem hairs appressed, leaves cauline, petioles 4-4.5mm, calyx spurred <= 1 mm, banner back hairy, keel upper margin ciliate distal half. Most of the Lupinus argenteus in Golden are var. argenteus.
- Heritage Dells, South Gulch, 6143. 6/1/2026. .
- North Hogback Open Space (City of Golden), var. argenteus assumed. Tom Schweich 1695. 6/14/2019. Also collected here: Poa pratensis, Secale cereale, Linum lewisii, and Lithospermum arvense. Northwesternmost Golden, between Pine Ridge Road and Dakota Ridge, on a southwest-facing bank of Cressmans Gulch, 4.42 km. north northwest of the GNIS location of Golden. Tom Schweich 2352. 12 Jun 2020. ( COLO2434140‡ OBI149352‡ REGIS UCR297618‡ ) .
- North Table Mountain Open Space (City of Golden), Low shrubs, forbs, and grasses, with Grindelia subalpina, Heterotheca villosa, Monarda fistulosa, Carex inops var. heliophila, and Bromus japonicus. Southwest slope of North Table Mountain, northern part of the open space, along a social trail, in an area of hummocky ground suggesting an ancient landslide, 2.34 km. north of the GNIS location of Golden. Tom Schweich 3423. 23 Jun 2025. ( CS ) .
- Stonebridge Homeowners Association, var. argenteus assumed Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2303. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 var. argenteus assumed Tom Schweich, with Ann Norton 2226. 6/12/2021. .
- Tripp Ranch Meadow Open Space,
2748.
6/10/2022.
Dry (-ish) northeast-facing slope. Also here: Artemisia ludoviciana, Helianthus pumilis, Heterotheca villosa, Linaria dalmatica, Eriogonum umbellatum, Rosa arkansana, and Koeleria macrantha.
High mixed-grass prairie at base of Rocky Mountain Front Range.
Very small (1.67 ac.) City of Golden-owned open space, adjacent to Jefferson County Open Space (Apex Park) and Stonebridge HOA common area, accessed by narrow passage from Crawford Street, 3.44 km. south of the GNIS location of Golden.
Tom Schweich 3246.
8 Jun 2024.
(
UCR
x-CDA
)
.
.
Medicago lupulina L. Black Medick. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual herb, prostrate, to 1 cm. × 50 cm. wide; Leaves, compound, stipules, leaf-like, 6.5 mm., petioles, 11 mm., leaflets, #3, obovate, 5 mm. × 5-6 mm. wide, margin denticulate, middle leaflet extended beyond lateral leaflet on a petiolule; Inflorescence, compact axillary raceme, 8 mm. × 3.5 mm. wide; Sepals, 1 mm.; Flowers, 2 mm., color yellow; Fruit, unknown -- should be curved (Described from Coll. No. 1803, 7 May 2018).
- Heritage Dells, South Gulch, 6139. 6/1/2026. .
- Stonebridge Homeowners Association,
Tom Schweich, with Ann Norton 2227.
6/12/2021.
.
.
 Coll. No. 1803, Medicago lupulina. |
 Coll. No. 1803, Medicago lupulina |
 Coll. No. 1803, Medicago lupulina |
 Coll. No. 1803, Medicago lupulina |
Medicago sativa L. Alfalfa. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space, 5965. 5/11/2026. 5967. 5/11/2026. .
- Cressmans Gulch, 4569. 4/15/2026. .
- Kinney Run South, 4469. 4/9/2026. .
- Parfet Open Space (City of Golden), 4114. 6/1/2025. .
- Grant Terry Open Space, iNaturalist Observation 30760225. sgeol 5915. 8/13/2019. .
- Heritage Dells, South Gulch, 6122. 6/1/2026. .
- Kinney Run, 4452. 3/30/2026. .
- Parfet Prehistoric Preserve, 4008. 4/30/2025. .
- Schweich Hill, Western section of parcel, which appears to have been revegetated following residential constriction in 2006-2007. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1646. 30 May 2017. ( CDA0050030‡ CS KHD00065371‡ ) .
- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2228. 6/12/2021. .
- Tripp Ranch Meadow Open Space, 2790. 6/10/2022. . .
Melilotus officinalis (L.) Lam. Yellow Sweet Clover. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space, 5994. 5/11/2026. .
- Heritage Dells, South Gulch, 6134. 6/1/2026. .
- North Hogback Open Space (City of Golden), Grassy bank of gulch, also seen or collected here: Rumex acetosella, Linum lewisii, Lupinus argenteus, and Thelesperma megapotamicum. Northwesternmost Golden, between Pine Ridge Road and Dakota Ridge, on a southwest-facing bank of Cressmans Gulch, 4.42 km. north northwest of the GNIS location of Golden. Tom Schweich 2360. 12 Jun 2020. ( CS ) .
- Schweich Hill, Extreme southeastern corner, approx. 5 m. in the parcel owned by Villas at Canyon Point, LLC. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 2.20 km. northwest of the GNIS location of Golden. Tom Schweich 2088. 26 Jun 2019. ( CDA0052293‡ KHD00070526‡ OBI ‡ REGIS ) .
- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2229. 6/12/2021. .
- Tripp Ranch Meadow Open Space,
2779.
6/10/2022.
.
.
 Inflorescence of Coll. No. 1687, Melilotus officinalis |
Oxytropis lambertii Pursh. Purple Locoweed. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, acaulescent, mostly dolabriform hairs (one arm much shorter than the other); Leaves, basal, pinnately compound, leaflets #17, terminal leaflet present; Inflorescence, raceme, peduncle 30 cm., pedicels very short; Bracts, 7 mm. × 1.6 mm. wide, green, lanceolate; Calyx, tube 7 mm. + lobes 4 mm. = 11 mm.; Flower, zygomorphic, various shades of magenta to purple, banner, 17 mm., wings, 16 mm., keel, 13 mm., blades united enclosing stamens, recurved beak; Stamens, #10, diadelphous (Described from Coll. No. 1385, 1 June 2016).
- Parfet Open Space (City of Golden), 4152. 6/1/2025. .
- North Hogback Open Space (City of Golden), Tom Schweich 1707. 6/14/2019. .
- Schweich Hill, Southwest slope near top of hill. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1615. 15 May 2017. ( COLO02347904‡ EIU KHD00065377‡ ) .
- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2230. 6/12/2021. .
- Tripp Ranch Meadow Open Space,
2769.
6/10/2022.
.
.
 Purple Locoweed (Oxytropis lambertii) on top of North Table Mountain. |
 Coll. No. 1385, Oxytropis lambertii |
 Coll. No. 3415, Oxytropis lambertii. |
Oxytropis sericea Nutt. ex Torr. & A. Gray. White Locoweed. CalPhotos. Jepson eFlora. SEINet Taxon.
- South Table Mountain Open Space (City of Golden),
Sandy soil, occasional.
Front Range, Golden, South Table Mountain, just East of Castle Rock summit. 13N 0482075E 4400443N.
Stanley Smookler 58.
16 Jun 1993.
(
KHD30086‡
)
.
.
 Coll. No. 2576, Oxytropis sericea |
Pediomelum tenuiflorum (Pursh) A. N. Egan. (Syn: Psoralea tenuiflora Pursh , Psoralidium tenuiflorum (Pursh) Rydb. ) Slimflower Scurfpea. CalPhotos. Jepson eFlora. SEINet Taxon.
- Grampsas North Open Space (City of Golden), 4282. 7/25/2025. .
- Parfet Open Space (City of Golden), 4108. 6/1/2025. .
- Kinney Run, Mostly disturbed grassland at the base of a bank constructed for houses, also seen here: Andropogon gerardii. West side of Kinney Run, near the houses of Stonebridge HOA between Deadman Gulch and Tripp Ranch, near an unnamed ephemeral stream draining Apex Park into Kinney Run, 2.56 km. south of the GNIS location of Golden. Tom Schweich 2413. 31 Jul 2020. ( CAS CDA0053774‡ COLO2433936‡ UCR ) .
- Magic Mountain Archeological Site, open field ca 2 1/2 mi S of Golden. T R70W S10. Ernest H. Brunquist 1. 14 Aug 1959. ( CS23962‡ ) .
- North Hogback Open Space (City of Golden), Marked with green flag. Tom Schweich 2477. 25 May 2021. ( Fragment ) .
- Parfet Prehistoric Preserve, 4067. 5/12/2025. .
- Schweich Hill, Southeast edge, in the approximate location of the city water line. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1703. 14 Jul 2017. ( KHD00065462‡ UC ) .
- South Table Mountain Open Space (City of Golden), 6010. 5/13/2026. .
- Stonebridge Homeowners Association, Tom Schweich 3256. 6/13/2023. .
- Tripp Ranch Meadow Open Space,
2768.
6/10/2022.
.
.
 Pediomelum tenuiflorum |
 Pediomelum tenuiflorum |
Securigera varia (L.) Lassen. (Syn: Coronilla varia L. ) Purple Crownvetch. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial shrub, to 1 m. × 3 m. dia.; Leaves, cauline, alternate, stipules, 3 mm. × 0.6 mm., strap-shaped, sessile or nearly so, compound, leaflets, #21, 9 mm. × 2.7 mm. wide, oblong, tip mucronate; Inflorescence, axillary umbellate clusters, peduncles, 25 mm., Pedicels, 2.5 mm., Calyx, conical, tube 2.5 mm. + lobes 0.5 mm.; Flowers, white to pink, banner 4 mm. + 2 mm., wings, 6 mm., keel, 9 mm.; Fruit, erect, 19 mm. × 1.5 mm. wide, ridged. (Described from Coll. No. 1526, 5 August 2016.)
- North Table Mountain Open Space (City of Golden),
Introduced.
Lower slopes on the south side of North Table Mountain, 330 m. south southeast of the USBR monument designated “North Table,” 1.22 km. north northeast of the GNIS location of Golden.
Tom Schweich 1526.
5 Aug 2016.
(
COLO02347979‡
EIU
JCOS s.n.
KHD00063631‡
OBI ‡
)
.
.
 Coll. No. 3008, Securigera varia. |
 Coll. No. 1526, Securigera varia |
Thermopsis rhombifolia (Nutt. ex Pursh) Nutt. ex Richardson var. divaricarpa (A. Nelson) Isely. (Syn: Thermopsis divaricarpa A. Nelson ) Spreadfruit Goldenbanner. CalPhotos. Jepson eFlora. SEINet Taxon.
- Heritage Dells, Middle Gulch, 4515. 4/9/2026. .
- Heritage Dells, South Gulch, 4491. 4/9/2026. .
- North Hogback Open Space (City of Golden), Mostly mixed grasses and forbs just below the Cercocarpus montanus belt, with Celtis reticulata, Rhus trilobata, Potentilla fissa, Grindelia squarrosa, and Gutierrezia sarothrae. Northwestern corner of Golden, south end of Dakota Ridge, a hogback that is structurally a continuation of Dinosaur Ridge, west limb at the south end on a small parcel owned by the City of Golden, 4.32 km. north northwest of the GNIS location of Golden. Tom Schweich 2475. 25 May 2021. ( OBI185092‡ ) .
- Stonebridge Homeowners Association, most likely var. divaricarpa as are all Golden collections Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2305. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 most likely var. divaricarpa as are all Golden collections Tom Schweich, with Ann Norton 2232. 6/12/2021. .
- Tripp Ranch Meadow Open Space,
Tom Schweich 3576.
6/8/2024.
.
.
Trifolium repens L. White Clover. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space,
5985.
5/11/2026.
.
.
 Coll. No. 2143, Trifolium repens |
 Coll. No. 2705, Trifolium repens |
 Head of Coll. No. 2143, Trifolium repens |
 Coll. No. 2705, Trifolium repens |
Vicia L. Vetch. CalPhotos. Jepson eFlora. SEINet Taxon.
- South Table Mountain Open Space (City of Golden), 6043. 5/13/2026. . .
Vicia americana Willd. American Vetch. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 30 cm.; Stem, not winged; Leaves, stipules, 3-4 mm. × 10-15 mm. wide, reduced above, lobed, not connate, nectary 0; cauline, compound, odd-pinnate, leaflets #6-8, + simple or 2(4)-forked tendril; Inflorescence, raceme, 4-5 flowered, pedicel 17 mm.; Flowers, zygomorphic, 14-20 mm., petals, ±white to blue distally, banner sometimes pink at point of inflection; Style, round, ring of hairs below stigma; Legume, stipe 5 mm. + body 20-32 mm. × 3-4 mm. wide + persistent style 2 mm. (Described from Coll. No. 1387, 1 June 2016, and Coll. No. 1394, 1 June 2016). Specimens with fewer flowers per raceme and forked tendrils are determined variety minor.
- North Table Mountain Open Space (City of Golden), In grass and small shrubs below the trail. [Variety minor if infraspecific names are to be applied.] Southwest side of North Table Mountain, along City of Golden North Table Mountain Trail, 2.5 km. north of the GNIS location of Golden. Tom Schweich 1394. 8 Jun 2016. ( CAS JCOS s.n. KHD00063958‡ OBI83201‡ UCR277986‡ ) .
- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2233. 6/12/2021. .
- Welch Ditch (Open Space),
4719.
4/25/2026.
.
.
 Coll. No. 1394, Vicia americana |
 Coll. No. 1394, Vicia americana |
 Coll. No. 1857, Vicia americana var. minor |
Vicia villosa Roth. Hairy Vetch. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial, herb, sprawling through the smooth brome, to 50 cm.; Leaves, compound, stipules, 13 mm. × 3 mm. wide, 2-lobed, petiole, 0, blade, 75 mm. × 28 mm. wide, leaflets, #13-15, 20 mm. × 4 mm. wide, linear-elliptic, terminal leaflet a tendril, forked, #3-4, hairs, straight; Inflorescence, raceme, secund, flowers, #±20; Calyx, tube 3 mm. + lobes 4 mm., narrow, hairs simple; Flower, zygomorphic, white to dark blue, banner, 16 mm., reflexed ¾, wings, 14 mm., clawed, dark blue, keel, 11 mm., tip obtuse; Style, ring of hairs below stigma, 0.6 mm.; Fruit, (immature) 5 mm. × 0.8 mm wide, lanceolate, glabrous. (Described from Coll. No. 1875, 24 May 2018.)
- Magic Mountain Archeological Site, Also collected here: Berteroa incana, Potentilla recta, and Verbascum thapsus. This area was extensively collected by E. H. Brunquist in 1959-1960 during the Peabody Museum excavation at Magic Mountain. Terrace on the north bank of Apex Gulch, between Fire Station 4 and the Kinney Run Trail bridge, 5.73 km. south of the GNIS location of Golden. Tom Schweich 2130. 8 Jul 2019. ( JCOS s.n. KHD00072745‡ OBI186007‡ UCR ) .
- South Table Mountain Open Space (City of Golden),
In fine, sandy soil of dry open field.
Front Range, Golden, South Table Mt., W. side of S. Table Mt. at base near 18th St. trailhead. 13N 0481976E 4400382N.
Stanley Smookler 59.
16 Jun 1993.
(
KHD30051‡
)
.
 Coll. No. 1875, Vicia villosa |
Fagaceae
Quercus gambelii Nutt. Gambel's oak. CalPhotos. Jepson eFlora. SEINet Taxon.
- South Illinois Open Space, 3935. 12/20/2024. .
- Stonebridge Homeowners Association,
planted
Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2306.
7/24/2020.
Sovell, John R., and Susan S. Panjabi, 2021
.
 Coll. No. 2738, Quercus gambelii |
 Coll. No. 2391, Quercus gambelii |
 Coll. No. 2288, Quercus gambelii |
Fumariaceae
Corydalis aurea Willd. Scrambled Eggs. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Table Mountain Open Space (City of Golden), Rocky open slopes above the trail. Small plants here, one larger plant in the basalt rim of the mesa. On the City of Golden North Table Mountain trail, just below the southwest rim of North Table Mountain, 1.9 km north of the GNIS location of Golden. Tom Schweich 1318. 22 Apr 2016. ( JCOS s.n. KHD00063906‡ UCR277960‡ ) .
- South Table Mountain Open Space (City of Golden),
A lava capped mesa in the Denver Formation, near bottom of SW facing steep, boulder covered slope, under Hackberry and Mountain Mahogany, only a few plants seen.
South Table Mountain, below Castle Rock. 13N 0482052E 4400328N.
Stanley Smookler 1192.
7 May 1985.
(
KHD21741‡
)
.
.
Fumaria vaillantii Loisel. Earthsmoke. CalPhotos. Jepson eFlora. SEINet Taxon.
- Stonebridge Homeowners Association, Tom Schweich 3257. 6/13/2023. .
- Tucker Gulch (lower),
Slope above creek.
Very few plants here, but more on the north bank of Clear Creek, cf., my Coll. No. 2484.
On east bank of Tucker Gulch near the City of Golden Tucker Gulch Trail between 1st Street and 7th Place, 1.51 km. north northwest of the GNIS location of Golden.
Tom Schweich, with Cindy Trujillo 2480.
27 May 2021.
(
KHD00075601‡
)
.
 Earthsmoke (Fumaria vaillantii beside Clear Creek Trail. |
Geraniaceae
Erodium cicutarium (L.) L'Her. ex Aiton. Hemlock-leav'd Crane's-bill. Weed: CO DofA, List: C. CalPhotos. Jepson eFlora. SEINet Taxon.
- Kinney Run South, 4487. 4/9/2026. .
- Heritage Dells, North Gulch, 4627. 4/23/2026. 4654. 4/23/2026. .
- Heritage Dells, South Gulch, 6113. 6/1/2026. .
- Kinney Run, 4443. 3/30/2026. .
- Magic Mountain Archeological Site, open gnd ca 2 1/2 mi S of Golden. T4N R70W S10. Ernest H. Brunquist 7. 14 Aug 1959. ( CS23944‡ ) .
- North Hogback Open Space (City of Golden), Tom Schweich 1716. 6/14/2019. Grassy southwest facing slope. Also collected here: Alyssum simplex, Euphorbia esula, and Castilleja integra. Southern end of the hogback in northernmost Golden, 4.15 km. north northwest of the GNIS location of Golden. Tom Schweich 2264.1 9 May 2020. ( OBI149327‡ ) .
- North Table Mountain Open Space (City of Golden), just beginning to bloom 4429. 3/13/2026. .
- Parfet Prehistoric Preserve, 4007. 4/30/2025. .
- Schweich Hill, Scattered around the parcel, in areas where the native or exotic vegetation is not too thick. Colorado Noxious Weed list C. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1622. 15 May 2017. ( CDA0050095‡ CS KHD00065375‡ ) .
- South Table Mountain Open Space (City of Golden), 6009. 5/13/2026. .
- Stonebridge Homeowners Association,
Tom Schweich, with Ann Norton 2234.
6/12/2021.
.
.
 Coll. No. 349, Erodium cicutarium |
 Coll. No. 1790, Erodium cicutarium |
 Coll. No. 2063.3, Erodium cicutarium |
 Coll. No. 2063.3, Erodium cicutarium |
 Coll. No. 2063.3, Erodium cicutarium |
Geranium caespitosum James. Pineywoods Geranium. CalPhotos. Jepson eFlora. SEINet Taxon.
- Stonebridge Homeowners Association,
Tom Schweich, with Ann Norton 2235.
6/12/2021.
.
Grossulariaceae
Ribes aureum Pursh. Golden Currant. CalPhotos. Jepson eFlora. SEINet Taxon.
Coll. No. 1319, 4 May 2016: Perennial shrub, to 1 m.; Stem, unarmed; Leaves, fascicled, broadly ovate, 29 mm. × 22 mm. wide, lobes 3, obtuse; Hypanthium, 9 mm., bright yellow; Sepals, petaloid, 5 mm.; Petals, 2.5 mm.; Ovary, 2 mm.
- Coors Tech Wetland Open Space, 5997. 5/11/2026. .
- Cressmans Gulch, 4567. 4/15/2026. .
- Heritage Dells, North Gulch, 4636. 4/23/2026. .
- Heritage Dells, South Gulch, 4507. 4/9/2026. .
- Kinney Run, Among deep grasses, forbs, and a few shrubs. Small alluvial terrance between the streambeds of Kinney Run and Deadman Gulch, 2.8 km. south of the GNIS location of Golden Tom Schweich 1822. 16 May 2018. ( CAS COLO02348183‡ KHD00069199‡ ) .
- South Table Mountain Open Space (City of Golden), 6049. 5/13/2026. .
- Tripp Ranch Meadow Open Space, Tom Schweich 3578. 6/8/2024. .
- Welch Ditch (Open Space),
4729.
4/25/2026.
.
.
 Habitat of Coll. No. 1834, Ribes aureum. |
 Grossulariaceae Ribes aureum |
 Grossulariaceae Ribes aureum |
 Ribes aureum in winter. |
 Twigs of Ribes aureum in winter. |
 Coll. No. 1834, Ribes aureum. |
Ribes cereum Douglas. Wax Currant. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space, 5972. 5/11/2026. .
- Eagle Ridge, On mesa slope in foothills. Transferred from USGS Herbarium, Denver, CO (2005). In foothills of the Front Range, at junction of US 6 and road to Morrison, about 1 mile east of Golden. Hansford T. Shacklette 5882. 27 Jun 1959. ( COLO530282‡ ) .
- Grampsas North Open Space (City of Golden), 3917. 12/7/2024. .
- Heritage Dells, North Gulch, 4599. 4/23/2026. .
- Heritage Dells, South Gulch, 6150. 6/1/2026. .
- Kinney Run, Among deep grasses, forbs, and a few shrubs. Small alluvial terrance between the streambeds of Kinney Run and Deadman Gulch, 2.8 km. south of the GNIS location of Golden Tom Schweich 1823. 16 May 2018. ( CAS COLO02348175‡ KHD00069203‡ ) .
- Magic Mountain Archeological Site, Tom Schweich 1649. 4/18/2018. .
- North Hogback Open Space (City of Golden), Most shrubs are Cercocarpus montanus with just a few R, cereum and one Amelanchier alnifolia, plus forbs such as Penstemon virens, Viola nuttallii, and Lappula occidentalis. Southern end of the hogback in northernmost Golden, 4.17 km. north northwest of the GNIS location of Golden. Tom Schweich 2270. 9 May 2020. ( OBI149332‡ REGIS ) .
- North Table Mountain Open Space (City of Golden), Rocky outcrops on the toe of a landslide. West slopes of North Table Mountain, along the City of Golden's North Table Mountain Trail, about 0.7 km south from North Table Loop, and 2.3 km north of the GNIS location of Golden. Tom Schweich 1092. 30 Apr 2015. ( CAS OBI82126‡ UCR265981‡ ) .
- Schweich Hill, In a weedy area near the fence north-central portion of parcel. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1618. 15 May 2017. ( KHD00065394‡ UC ) .
- South Table Mountain Open Space (City of Golden), 6035. 5/13/2026. .
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2308. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 Tom Schweich, with Ann Norton 2236. 6/12/2021. .
- Tripp Ranch Meadow Open Space,
2772.
6/10/2022.
.
 Developing fruit on Ribes cereum. |
 Coll. No. 1091, Rubus deliciosus |
 Coll. No. 1092, Ribes cereum |
Hydrangeaceae
Jamesia americana Torr. & A. Gray var. americana. Fivepetal Cliffbush. CalPhotos. Jepson eFlora. SEINet Taxon.
- Welch Ditch,
Collected nearby: Aletes acaulis, Sedum lanceolatum, Eriogonum umbellatum, Acer glabrum, and Koeleria macrantha.
Popular rock-climbing area with heavy daily use.
Along the former Welch Ditch, south side of Clear Creek, growing in rocks above the ditch, barely reachable, more on slope above, just inside the mouth of Clear Creek Canyon, 2.59 km. west southwest of the GNIS location of Golden.
Tom Schweich 2311.
3 Jun 2020.
(
COLO2434462‡
JCOS s.n.
KHD00072482‡
UC
)
.
Hypericaceae
Hypericum perforatum L. Common St. John's Wort. Weed: CO DofA, List: C. CalPhotos. Jepson eFlora. SEINet Taxon.
Treated in family Clusiaceae by Ackerman (2015). Hypericaceae retained at rank of Family by APG IV.
- North Hogback Open Space (City of Golden), 4521. 4/11/2026. Tom Schweich 1741. 6/14/2019. Foothills shrubland, mostly Cercocarpus montanus; also collected here: Gaillardia aristata; nearby: Campanula rotundifolia, and Muhlenbergia montana. Hogback at the northern city limits of Golden, nearly to the top of the west slopes. 4.40 km. north northwest of the GNIS location of Golden. Tom Schweich 2356.1 12 Jun 2020. ( CS EIU ) .
- Stonebridge Homeowners Association,
Tom Schweich, with Ann Norton 2237.
6/12/2021.
.
 Coll. No. 1228, Hypericum perforatum |
 Coll. No. 1229, Hypericum perforatum |
Juglandaceae
Juglans nigra L. Black Walnut. CalPhotos. Jepson eFlora. SEINet Taxon.
- Grampsas North Open Space (City of Golden),
4302.
7/25/2025.
4316.
7/25/2025.
4317.
7/25/2025.
4318.
7/25/2025.
.
 Obs. No. 4302, Juglans nigra fruit. |
 Obs. No. 4302, Juglans nigra leaf. |
 Obs. No. 4302, Juglans nigra in Grampsas North Open Space. |
Lamiaceae
Lamium amplexicaule L. Henbit. CalPhotos. Jepson eFlora. SEINet Taxon.
- Schweich Hill, Small group of plants in the area that has previously mowed by neighbors, northeast corner of parcel. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1776. 11 Apr 2018. ( CDA0052336‡ JCOS s.n. KHD00069180‡ OBI162801‡ ) . .
Marrubium vulgare L. Horehound. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Hogback Open Space (City of Golden), Tom Schweich 1725. 6/14/2019. .
- North Table Mountain Open Space (City of Golden), sterile 4430. 3/13/2026. .
- Parfet Prehistoric Preserve, 4018. 4/30/2025. .
- Schweich Hill, 2793. 6/12/2022. .
- South Table Mountain Open Space (City of Golden), 6004. 5/13/2026. 6017. 5/13/2026. . .
Mentha spicata L. Spearmint. CalPhotos. Jepson eFlora. SEINet Taxon.
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2309. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 . .
Monarda fistulosa L. Wild Bergamot. CalPhotos. Jepson eFlora. SEINet Taxon.
- Kinney Run, Tom Schweich 1634. 7/6/2018. .
- Magic Mountain Archeological Site, This area was extensively collected by E. H. Brunquist in 1959-1960 during the Peabody Museum excavation at Magic Mountain. M. fistulosa was also collected at that time. Terrace on the north bank of Apex Gulch, between Fire Station 4 and the Kinney Run Trail bridge, 5.74 km. south of the GNIS location of Golden. Tom Schweich 2134. 8 Jul 2019. ( CDA0052302‡ COLO2434231‡ CS198630‡ REGIS ) .
- North Table Mountain Open Space (City of Golden), Low shrubs, forbs, and grasses, with Grindelia subalpina, Heterotheca villosa, Lupinus argenteus var. argenteus, Carex inops var. heliophila, and Bromus japonicus. Southwest slope of North Table Mountain, northern part of the open space, along a social trail, in an area of hummocky ground suggesting an ancient landslide, 2.34 km. north of the GNIS location of Golden. Tom Schweich 3425. 23 Jun 2025. .
- Stonebridge Homeowners Association,
Tom Schweich 3258.
6/13/2023.
.
.
 Coll. No. 1245, Monarda fistulosa growing in a patch of poison ivy. |
 Sea of Monarda fistulosa |
 Coll. No. 1201, Monarda fistulosa |
 Coll. No. 1697, Monarda fistulosa |
 Coll. No. 1697, Monarda fistulosa |
Nepeta cataria L. Catnip. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 40 cm.; Stem, square, hispid; Leaves, opposite, petiole, 8 mm., blade, 40 mm. × 19 mm. wide, reduced above, deltoid-chordate, margin, crenate, abaxial densely hispid, rather than tomentose per Ackerfield (2015), tip, acute; Inflorescence, flower clusters arising from axils, flowers pedicillate; Calyx, lobes sharply acute but lacking spines or bristles; Corolla, 2-lipped, white (Described from Coll. No. 2214, 29 August 2019).
- Cressmans Gulch, 4542. 4/15/2026. .
- Grampsas North Open Space (City of Golden), 4308. 7/25/2025. .
- Parfet Prehistoric Preserve, 4030. 4/30/2025. .
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2310. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 . .
Salvia L. Sage. CalPhotos. Jepson eFlora. SEINet Taxon.
- Heritage Dells, North Gulch, 4630. 4/23/2026. . .
Salvia . Horticultural Salvia. CalPhotos. Jepson eFlora. SEINet Taxon.
- Heritage Dells, South Gulch, 6147. 6/1/2026. .
- Welch Ditch (Open Space), 4735. 4/25/2026. . .
Salvia pratensis L. Meadow Clary. CalPhotos. Jepson eFlora. SEINet Taxon.
- Deadman Gulch,
Likely garden escapee.
Along Deadman Gulch (Kinney Run), between US Highway 6 and Eagle Ridge Drive, on a bank of the creek, 3.24 km. south of the GNIS location of Golden.
Tom Schweich 2424.
17 Aug 2020.
(
COLO2434033‡
KHD00072964‡
)
.
.
 Coll. No. 2424, Salvia cf. pratensis. |
Scutellaria brittonii Porter. Britton's Skullcap. CalPhotos. Jepson eFlora. SEINet Taxon.
- Deadman Gulch, Southeast-facing slope, most dense in and around Rhus trilobata shrubs. Slightly above the watercourse locally named “Kinney Run,” between US Highway 6 and Eagle Ridge Drive, 50 m. northwest of Kinney Run Trail, 3.17 km. south of the GNIS location of Golden. Tom Schweich 2042. 2 Jun 2019. ( CS198665‡ KHD00071099‡ REGIS s.n. Error 14.6(b)-7c UC ) .
- Eagle Ridge, Tom Schweich 3172. 5/28/2023. .
- Kinney Run, Small, dense colony. East-facing alluvial slope of a small hill between Kinney Run and Deadman Gulch, 2.86 km. south of the GNIS location of Golden. Tom Schweich 1825. 16 May 2018. ( COLO02348274‡ UCR ‡ ) Tom Schweich 1841. 5/15/2020. .
- North Hogback Open Space (City of Golden), 4526. 4/11/2026. Mixed-grass prairie just below foothills mountain mahogany shrubland; collected here: Cerastium arvense, Lomatium orientale, Amelanchier alnifolia, nearby: Cercocarpus montanus. Southern end of the hogback in northernmost Golden, 4.16 km. north northwest of the GNIS location of Golden. Tom Schweich 2266. 9 May 2020. ( CDA0053729‡ EIU ) .
- Schweich Hill, Numerous plants in cut, disturbed bank. iNaturalist Observation 219332225. Tom Schweich, with Cathy Hansen-Stamp 3558. 5/29/2024. .
- Tripp Ranch Meadow Open Space,
dry red soil near western boundary
Tom Schweich 3575.
6/8/2024.
.
.
Stachys byzantina K. Koch. Lamb's Ear. CalPhotos. Jepson eFlora. SEINet Taxon.
- Heritage Dells, North Gulch, 4628. 4/23/2026. .
- Welch Ditch (Open Space), 4744. 4/25/2026. .
Linaceae
Linum L.. Flax. CalPhotos. Jepson eFlora. SEINet Taxon.
- Kinney Run South, 3973. 1/3/2025. . .
Linum lewisii Pursh. (Syn: Adenolinum lewisii (Pursh) A. Löve & D. Löve ) Prairie Blue Flax. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space, 5978. 5/11/2026. .
- Kinney Run South, 4483. 4/9/2026. .
- Parfet Open Space (City of Golden), 4112. 6/1/2025. .
- Kinney Run, 4450. 3/30/2026. .
- North Hogback Open Space (City of Golden), Tom Schweich 1701. 6/14/2019. Also collected here: Poa pratensis, Secale cereale, Lupinus argenteus, and Lithospermum arvense. Northwesternmost Golden, between Pine Ridge Road and Dakota Ridge, on the lower part of the west-facing limb of Dakota Ridge, 4.46 km. north northwest of the GNIS location of Golden. Tom Schweich 2353. 12 Jun 2020. ( CDA0053751‡ COLO2434132‡ REGIS ) .
- Schweich Hill, Tom Schweich, with Margaret Henderson and Nancy von Burske 1931. 6/6/2020. .
- South Table Mountain Open Space (City of Golden), 6032. 5/13/2026. .
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2311. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 Tom Schweich, with Ann Norton 2238. 6/12/2021. .
- Tripp Ranch Meadow Open Space, 2763. 6/10/2022. .
- Welch Ditch (Open Space),
4702.
4/25/2026.
.
.
 Coll. No. 3119, Linum perenne. |
 Coll. No. 823, Linum lewisii |
 Coll. No. 1383, Linum perenne |
 Inflorescence of Coll. No. 1951, Linum lewisii |
Linum perenne L. (Syn: Adenolinum perenne (L.) Rchb. ) Blue Flax. CalPhotos. Jepson eFlora. SEINet Taxon.
Weber & Wittmann (2012) distinguish between L. perenne and L. lewisii with the character of heterostyly in which some plants have styles longer than stamens and others with styles shorter than stamens. They apply homostyly to L. lewisii noting that the styles and stamens are approximately equal. My plants (Coll. No. 1383) consistently have styles longer than stamens. The key in Ackerfield (2015), based on plant structure and overall shape is not helpful because of the range of characters observed with this collection.
- Eagle Ridge, Tract A, Common in this field of remnant mixed-grass prairie, drier patch dominated by Artemisia ludoviciana, stiff clay soil. City-owned parcel north of “Eagle Ridge” between CSM Survey Field and US Highway 6, about 70 m. northwest of the Kinney Run Trail, 2.37 km. (geodesic) south of the GNIS location of Golden. Tom Schweich 2980. 19 Jun 2023. ( CDA ) .
- Parfet Prehistoric Preserve, 4071. 5/12/2025. .
Loasaceae
Mentzelia . Blazing Star. CalPhotos. Jepson eFlora. SEINet Taxon.
- Grampsas North Open Space (City of Golden), 3914. 12/7/2024. . .
Mentzelia albicaulis (Douglas ex Hook.) Douglas ex Torr. & A. Gray. (Syn: Acrolasia albicaulis (Douglas) Rydb. , Bartonia albicaulis Douglas ex Hooker ) White-Stem Blazing Star. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual, 15-20 cm., taproot; Leaves, basal and cauline, deeply pinnately alternately lobed to mid-rib; Bract lanceolate, 6 mm., entire or 3-lobed, green, not conspicuous, not concealing fruits; Corolla petals free, 5-6 mm. × 2.0-2.5 mm. wide, with orange base and yellow tip; Style, 2.8 mm.; Fruit cylindric-obconic (Sect. Trachyphytum), 15-20 mm. × 2.5 (4.0) mm. wide, curved 30°-80°(130°); Seeds in 4 above mid-fruit, angular, 1.3 mm. × 0.7 mm. × 0.5 mm., dark brown to black in age, seed coat cells domed on seed surface edges, seed coat cells flattened away from edges (Described from Coll. No. 390, 427, and 958).
- North Table Mountain Open Space (City of Golden),
The brush is mostly Prunus americanus, with some Prunus virginiana, Rhus trilobata, and Cercocarpus montanus.
Heavy brush and boulders on steep southwest slope of North Table Mountain, above the spring, but below the headscarp of an ancient landslide, 1.87 km. north of the GNIS location of Golden.
Tom Schweich, with Cindy Trujillo 2515.
18 Jun 2021.
(
KHD00075593‡
)
.
.
Mentzelia nuda (Pursh) Torr. & A. Gray. (Syn: Nuttallia nuda (Pursh) Greene ) Bractless Blazing Star. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Open Space (City of Golden), 4401. 9/11/2025. .
- Schweich Hill,
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue. Top of Hill, center of parcel.
Tom Schweich 1731.
31 Jul 2017.
(
KHD00065324‡
)
.
 Mentzelia nuda on Schweich Hill. |
 U. S. Distribution of Mentzelia nuda. |
 Bractless Blazing Star (Mentzelia nuda) with last year's fruit. |
Malvaceae
Malva neglecta Wallr. Common Mallow. CalPhotos. Jepson eFlora. SEINet Taxon.
- Cressmans Gulch, 4564. 4/15/2026. .
- Heritage Dells, South Gulch, 6157. 6/1/2026. .
- Schweich Hill, Large plant at the edge of the area mowed by neighbors. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Northeast corner of parcels. Tom Schweich 1746. 31 Aug 2017. ( CDA0052328‡ KHD00065357‡ ) . .
Sphaeralcea coccinea (Nutt.) Rydb. Cowboy's Delight. CalPhotos. Jepson eFlora. SEINet Taxon.
- Deadman Gulch, Open east-facing grassy slopes. Uncommon, only one seen here, two more 165 m. northwest (Coll. No. 1433). High plains between US Hwy 6 and Lookout Mountain, about 140 m. west of the Deadman Gulch undercrossing of US Hwy 6, 2.3 km. south of the GNIS location of Golden. Tom Schweich 1424. 15 Jun 2016. ( KHD00063998‡ ) .
- Eagle Ridge, On mesa slope. Transferred from USGS Herbarium, Denver, CO (2005). In foothills of the Front Range, at junction of US 6 and road to Morrison, about 1 mile east of Golden. Hansford T. Shacklette 5898. 27 Jun 1959. ( COLO529413‡ ) Tom Schweich 3181. 5/28/2023. .
- Eagle Ridge, Tract A, Common in this field, drier patch dominated by Artemisia ludoviciana, stiff clay soil. City-owned parcel north of “Eagle Ridge” between CSM Survey Field and US Highway 6, about 50 m. northwest of the Kinney Run Trail, 2.38 km. (geodesic) south of the GNIS location of Golden Tom Schweich 2977. 19 Jun 2023. ( CofG ) .
- Parfet Open Space (City of Golden), 4147. 6/1/2025. .
- North Table Mountain Open Space (City of Golden), Most dense along disturbed trail sides, the roots of this one extended under the trail. Highest prairie mixed with foothill shrubs, also collected nearby: Aegilops cylindrica, Hesperostipa comata, Lithospermum occidentale, Linaria dalmatica, and Thinopyrum intermedium. Lower southwest slopes of North Table Mountain, along the lower portion of the City of Golden North Table Mountain trail, 1.95 km. north of the GNIS location of Golden. Tom Schweich 2053. 4 Jun 2019. ( OBI ‡ REGIS UC ) .
- Parfet Prehistoric Preserve, 4021. 4/30/2025. 4050. 5/12/2025. 4057. 5/12/2025. .
- Schweich Hill, 2794. 6/12/2022. .
- South Table Mountain Open Space (City of Golden), 6005. 5/13/2026. .
- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2239. 6/12/2021. .
- Tripp Ranch Meadow Open Space,
2753.
6/10/2022.
.
 Sphaeralcea coccinea (Nutt.) Rydb. On the lowest slopes of North Table Mountain. |
 Coll. No. 1423, Sphaeralcea coccinea |
Montiaceae
Claytonia rosea Rydb. Rocky Mountain Springbeauty. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Table Mountain Open Space (City of Golden),
4434.
3/26/2026.
.
.
Phemeranthus parviflorus (Nutt.) Kiger. (Syn: P. confertiflorus (Greene) Hershk. , Talinum confertiflorum Greene ) Sunbright. CalPhotos. Jepson eFlora. SEINet Taxon.
- Magic Mountain Archeological Site,
4366.
7/30/2025.
.
 Phemeranthus parviflorus on top of North Table Mountain. |
 Small plant seen on top of North Table Mountain |
 Coll. No. 1689.1, Phemeranthus parviflorus |
Nyctaginaceae
Mirabilis linearis (Pursh) Heimerl. (Syn: Oxybaphus linearis (Pursh) B. L. Robinson ) Narrowleaf Four O'Clock. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 1 m.; Stem, ascending through brush, glabrous below; Leaves, cauline, alternate, sessile, 90 mm. × 5 mm. wide, linear; Involucre, 15 mm., hairs with pale crosswalls; Flowers, 3 per involucre; Fruit, 4 mm. × 2.2 mm., obovate, ribs 4, hairy. Described from Coll. No. 1273, 30 Jul 2015.
- Grampsas North Open Space (City of Golden), 4286. 7/25/2025. .
- Parfet Open Space (City of Golden), top of ridge 4399. 9/11/2025. .
- North Table Mountain Open Space (City of Golden), 4216. 6/27/2025. Emerging from brush below the trail. Southwestern slope of North Table Mountain along the North Table Mountain trail (a City of Golden trail), 1.63 km north of the GNIS location of Golden. Tom Schweich 1273. 30 Jul 2015. ( KHD00060596‡ ) Widely scattered; collected with Andropogon gerardii. South side of North Table Mountain, below Climbing Access Trail near the top of the slope; 260 m. southeast of the USBR monument designated “North Table,” 1.38 km. north northeast of the GNIS location of Golden. Tom Schweich 1525. 5 Aug 2016. .
- Schweich Hill,
One plant seen in bloom.
Tom Schweich 1579.
7/31/2017.
.
.
 Coll. No. 1273, Mirabilis linearis |
 Coll. No. 1525, Mirabilis linearis |
Mirabilis nyctaginea (Michx.) MacMill. (Syn: Allionia nyctaginea Michx. , Calymenia nyctaginea (Michx.) Nutt. , Oxybaphus nyctagineus (Michx.) Sweet ) Heartleaf Four O'Clock. CalPhotos. Jepson eFlora. SEINet Taxon.
- Deadman Gulch, Riparian, also seen or collected nearby: Clematis ligusticifolia, Crataegus succulenta, Epilobium hirsutum, Symphyotrichum lanceolatum var. hesperium, and Arrhenatherum eliatus. On the bank southwest side above the creek in Deadman Gulch (Kinney Run), above US Highway 6 and just below Eagle Ridge Drive, 3.43 km. south of the GNIS location of Golden. Tom Schweich 2442.1 28 Aug 2020. ( CAS CDA0053780‡ KHD00072994‡ UCR ) .
- Kinney Run, Beside Deadman Gulch, also euphemistically called Kinney Run, along Illinois Street between US Highway 6 and the Fossil Trace Golf Club, 2.16 km. south southeast of the GNIS location of Golden. Tom Schweich 1963. 7 Jul 2018. ( COLO KHD00068920‡ OBI170738‡ UC ) .
Oleaceae
Fraxinus pennsylvanica Marshall. Green Ash. CalPhotos. Jepson eFlora. SEINet Taxon.
- Eagle Ridge, Tom Schweich 3182. 5/28/2023. .
- Parfet Prehistoric Preserve, 4063. 5/12/2025. .
- Welch Ditch (Open Space),
4688.
4/25/2026.
.
.
 Coll. No. 3015, Fraxinus pennsylvanica. |
Ligustrum vulgare L. Privet. CalPhotos. Jepson eFlora. SEINet Taxon.
Introduced.
- Magic Mountain Archeological Site,
Shaded, equable habitat.
This area was extensively collected by E. H. Brunquist in 1959-1960 during the Peabody Museum excavation at Magic Mountain. L. vulgare was not collected at that time.
Terrace on the north bank of Apex Gulch, between Fire Station 4 and the Kinney Run Trail bridge, 5.74 km. south of the GNIS location of Golden.
Tom Schweich 2135.
8 Jul 2019.
(
CDA0052303‡
COLO2435345‡
JCOS s.n.
KHD00074282‡
)
.
.
 Coll. No. 2135, Ligustrum vulgare |
 Coll. No. 2135, Ligustrum vulgare |
 Coll. No. 2135, Ligustrum vulgare |
Syringa vulgaris L. Common Purple Lilac. CalPhotos. Jepson eFlora. SEINet Taxon.
- Cressmans Gulch, 4555. 4/15/2026. .
- Grant Terry Open Space, iNaturalist Observation 277715436. micaylawerner 5921. 5/2/2025. .
- Heritage Dells, North Gulch, 4632. 4/23/2026. 4646. 4/23/2026. .
Onagraceae
Epilobium L. Willowherb. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual, to 1 dm, glabrous; Leaves opposite, to 3 cm, 1 cm wide; Ovary inferior; Sepals 4, 3 mm; Petals 4, white to rose; Stamens 2 x 4 = 8, unequal; Stigma entire (Described from Coll. No. 690.1, 8 Nov 2011).
- Stonebridge Homeowners Association,
Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2314.
7/24/2020.
Sovell, John R., and Susan S. Panjabi, 2021
.
.
 Coll. No. 841, Epilobium sp. |
 Coll. No. 2561.1, Epilobium sp. |
Epilobium ciliatum Raf. Fringed Willowherb. CalPhotos. Jepson eFlora. SEINet Taxon.
- Deadman Gulch, Foothills grassland north side of creek; foothills shrubland south side of creek; Also collected here: Solanum dulcamara, Cirsium arvense, Dactylis glomerata, and Thinopyrum intermedium. Near the junction of Deadman Gulch and Kinney Run, south bank of creek, 2.28 km. south of the GNIS location of Golden. Tom Schweich 2409. 31 Jul 2020. ( CAS CDA0053771‡ COLO2434017‡ UC ) .
- North Table Mountain Open Space (City of Golden), Small wetland where the North Table Mountain Trail crosses a watercourse below a near-perennial spring that is higher on the south slope of the mesa. Lower south slopes of North Table Mountain, above Peery Parkway, 250 m. south of the USBR monument “North Table,”1.25 km. north of the GNIS location of Golden. Tom Schweich 1532. 5 Aug 2016. ( JCOS s.n. KHD00063802‡ ) .
- Stonebridge Homeowners Association,
Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2312.
7/24/2020.
Sovell, John R., and Susan S. Panjabi, 2021
Tom Schweich, with Ann Norton 2240.
6/12/2021.
.
.
Epilobium hirsutum L. Hairy Willowherb. Weed: CO DofA, List: A. CalPhotos. Jepson eFlora. SEINet Taxon.
- Deadman Gulch, Tom Schweich 1979. 7/24/2020. With Epilobium ciliatum, Rumex crispum,Canada thistle, Salix amygdaloides, and Catnip. Tom Schweich 1997. 8/23/2020. Near the playground in Deadman Gulch. Tom Schweich 1998. 8/23/2020. Along a tributary to Deadman Gulch. Tom Schweich 1999. 8/23/2020. spread along the streambed Tom Schweich 2003. 8/28/2020. In streambed. Common along Deadman Gulch below Eagleridge Drive, and Kinney Run below Deadman Gulch to US Highway 6. Colorado Noxious Weed List A. Near the junction of Deadman Gulch and Kinney Run, 2.28 km. south of the GNIS location of Golden Tom Schweich 2406. 31 Jul 2020. ( COLO2433977‡ KHD00073465‡ OBI149098‡ UCR ) .
- Kinney Run, in the bed of Kinney Run Tom Schweich, with Suzy Stutzmann and Laurel Starr. 2964. 3/30/2023. .
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2313. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 .
- Tucker Gulch (lower),
in the concrete gulch between 9th and 10th Streets
Tom Schweich 2006.
9/14/2020.
in the concrete ditch between 10th Street and the end of Water Street.
Tom Schweich 2007.
9/14/2020.
in the concrete gulch below the bridge from East Street to Vanover Park.
Tom Schweich 2008.
9/14/2020.
.
.
Oenothera L. Evening Primrose. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space, 5963. 5/11/2026. . .
Oenothera biennis L. King's-Cureall. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial (biennial?), to 60 cm., hairy throughout, hairs lacking red pustular bases; Stem, leafy; Leaves, basal, unknown, cauline, 90-115 mm. × 23-35 mm., elliptic to falcate, margin shallowly dentate, tip acute; Sepals, 11 mm., spreading to reflexed in maturity, tips barely free in bud; Flowers, solitary in leafy bracteate spike, petals, 10 mm., obovate, yellow, fading both orange and pink; Stigma, 4-lobed; Capsules, 17-21 mm., not mature (Described from Coll. No. 2416, 11 Aug 2020). Accepted by Ackerfield (2015). Will key to O. villosa in Weber & Wittman (2012) wherein this taxon is not recognized. Native to central and eastern US and the Pacific coast, but not to Colorado, Idaho, Wyoming, Utah, or Arizona.
- Deadman Gulch, Mixed foothils shrubland and grassland. Collected during CNHP survey of Stonebridge HOA open space contracted by Stewards of Golden Open Space. Stonebridge HOA-owned open space between Mourning Dove Lane and Blue Jay Drive, above Eagle Ridge Drive and below Jefferson County Open Space Apex Park, 4.12 km. south of the GNIS location of Golden. Tom Schweich, with Susan Panjabi and Zachariah Wilson 2416. 11 Aug 2020. ( KHD00073445‡ ) .
- Stonebridge Homeowners Association,
Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2315.
7/24/2020.
Sovell, John R., and Susan S. Panjabi, 2021
.
.
 Coll. No. 3072, Oenothera biennis. |
 Coll. No. 2416, Oenothera biennis |
Oenothera coronopifolia Torr. & A. Gray. Crownleaf Evening Primrose. Hierba de San Juan.. CalPhotos. Jepson eFlora. SEINet Taxon.
- Schweich Hill,
One plant.
iNaturalist Observation 220926439.
Tom Schweich, with Cathy Hansen-Stamp and Cynthia Hastings. 3561.
6/6/2024.
.
.
 Obs. No. 1599, Oenothera coronopifolia |
 Coll. No. 3443, Oenothera coronopifolia. |
 Coll. No. 2566, Oenothera coronopifolia |
Oenothera curtiflora W.L. Wagner & Hoch. (Syn: Gaura mollis James, nom. rej. , Gaura parviflora Douglas ex Lehm. ) Velvet Butterfly-Weed. CalPhotos. Jepson eFlora. SEINet Taxon.
- Magic Mountain Archeological Site,
4321.
7/30/2025.
.
.
 Coll. No. 1505, Oenothera curtiflora |
 Inflorescence of Coll. No. 1505, Oenothera curtiflora |
Oenothera howardii (A. Nels.) W. L. Wagner. Howard's Evening Primrose. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Open Space (City of Golden), Mixed-grass prairie, with Ericameria nauseosa var. nauseosa, Gutierrezia sarothrae, Kraschinnikovia lanata, Allium textile, Andropogon gerardii, and Bouteloua curtipendula. This parcel was designated a City of Golden Open Space in 2025. West central part of the open space, above the Welch Ditch, above the social trail and getting close to the houses, 1.06 km. southwest of the GNIS location of Golden. Tom Schweich 3396. 1 Jun 2025. ( OBI ) .
- Parfet Prehistoric Preserve,
4065.
5/12/2025.
4066.
5/12/2025.
.
.
 Coll. No. 3396, Oenothera howardii. |
 Coll. No. 1430, Oenothera howardii |
Oenothera suffrutescens (Ser.) W. L. Wagner & Hoch. (Syn: Gaura coccinea Pursh , Gaura glabra Lehm. ) Linda Tarde. CalPhotos. Jepson eFlora. SEINet Taxon.
Herbaceous perennial, to 60 cm.; Stipules absent; Leaves alternate, 25 mm. x 5 mm., lanceolate, few toothed; Inflorescence straight, open; Bracts 2-3 mm.; Buds erect; Sepals fused to tip in bud, all coming free, reflexed, 6 mm., not persistent after flowering; Hypanthium 6 mm.; Petals entire; Stamens 8, < stigma; Anthers maturing in unison with stigma; Ovary at flowering > distal internode (ergo infl. "open"); Stigma 4-lobed; Fruit 7 mm., stalk-like base 0, erect, fusiform, gradually wider at middle, puberulent, indehiscent; Seeds few, 2 mm., glabrous, not winged (Decribed from Coll. No. 317, keyed 15 Dec 2012).
- Eagle Ridge, On mesa slope in foothills. In foothills of the Front Range, at junction of US 6 and road to Morrison, about 1 mile east of Golden. Hansford T. Shacklette 5877. 27 Jun 1959. ( COLO 00860197‡ ) .
- Parfet Open Space (City of Golden), 4125. 6/1/2025. .
- North Hogback Open Space (City of Golden), Tom Schweich 1723. 6/14/2019. .
- Parfet Prehistoric Preserve, 4054. 5/12/2025. 4058. 5/12/2025. .
- Schweich Hill, West side of hill, on the edge of a path that the neighbors have mowed into the smooth brome. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1671. 16 Jun 2017. ( KHD00065485‡ ) .
- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2241. 6/12/2021. .
- Tripp Ranch Meadow Open Space,
2764.
6/10/2022.
.
 Coll. No. 317, Oenothera suffrutescens |
 Inflorescence of Coll. No. 1147, Oenothera suffrutescens |
 Overview of Coll. No. 1147, Oenothera suffrutescens |
 Coll. No. 1866, Oenothera suffrutescens |
Orobanchaceae
Castilleja integra A. Gray. Wholeleaf Indian Paintbrush. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Open Space (City of Golden), 4141. 6/1/2025. .
- Heritage Dells, South Gulch, 6145. 6/1/2026. .
- Kinney Run, 4449. 3/30/2026. .
- Schweich Hill, Top of hill in the remnant short-grass prairie found there. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1614. 15 May 2017. ( EIU029804‡ KHD00065380‡ ) .
- Stonebridge Homeowners Association, Tom Schweich 3298. 6/21/2023. .
- Tripp Ranch Meadow Open Space,
Tom Schweich 3579.
6/8/2024.
.
.
Orobanche fasciculata Nutt. (Syn: Aphyllon fasciculatum (Nutt.) Torr. & A. Gray ) Clustered Broomrape. CalPhotos. Jepson eFlora. SEINet Taxon.
- Deadman Gulch, With Artemisia frigida and Lithospermum incisum Slightly above the watercourse locally named “Kinney Run,” between US Highway 6 and Eagle Ridge Drive, 90 m. northwest of Kinney Run Trail, 3.17 km. south of the GNIS location of Golden. Tom Schweich 2043. 2 Jun 2019. ( KHD00071097‡ ) .
- Eagle Ridge, On mesa slope in foothills. Transferred from USGS Herbarium, Denver, CO (2005). In foothills of the Front Range at junction of US 6 and road to Morrison. About 1 mile east of Golden. Hansford T. Shacklette 5883. 27 Jun 1959. ( COLO529513‡ ) .
- North Hogback Open Space (City of Golden), Tom Schweich 1944. 6/12/2020. .
- Schweich Hill,
Tom Schweich 1619.
6/15/2018.
.
Papaveraceae
Argemone polyanthemos (Fedde) G.B. Ownbey. Crested Prickly Poppy. CalPhotos. Jepson eFlora. SEINet Taxon.
- Grampsas North Open Space (City of Golden), 3916. 12/7/2024. .
- Grant Terry Open Space, iNaturalist Observation 120670920. becks_walker 5865. 6/5/2022. .
- Heritage Dells, South Gulch, 6127. 6/1/2026. .
- Kinney Run, Tom Schweich 1632. 7/6/2018. .
- Magic Mountain Archeological Site, 4358. 7/30/2025. .
- South Table Mountain Open Space (City of Golden), 6042. 5/13/2026. .
- Stonebridge Homeowners Association, Rev. TAS Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2316. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 .
- Tucker Gulch (lower),
Tom Schweich 2907.
7/6/2022.
.
Plantaginaceae
Collinsia parviflora Lindl. Maiden Blue-eyed Mary. CalPhotos. Jepson eFlora. SEINet Taxon.
- Eagle Ridge, Tom Schweich 3037. 5/9/2023. .
- Grant Terry Open Space, iNaturalist Observation 158972604. gwynnevere 5933. 5/1/2023. .
- North Hogback Open Space (City of Golden),
Also collected nearby: in the gulch: Veronica biloba; above the gulch: Lupinus argenteus, Euphorbia esula, Lithospermum arvense, Poa pratensis, and Secale cereale.
Northwest corner of Golden, in recently deposited silt in channel of Cressmans Gulch, 60 m. downstream from Pine Ridge Road, 4.51 km. northwest of the GNIS location of Golden.
Tom Schweich 2471.
25 May 2021.
(
Golden
)
.
.
Linaria canadensis (L.) Dum.-Cours. var. texana (Scheele) Pennell. (Syn: Nuttallanthus texanus (Scheele) D. A. Sutton ) Blue Toadflax. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Hogback Open Space (City of Golden),
In sedimentary rocks with Rhus trilobata and Heterotheca villosa.
Name of ridge is taken from Van Horn (1972) Geology of Golden quadrangle, but is otherwise not accepted by the USGS.
Western slope, southernmost end of Dakota Ridge, 4.3 km. north northwest of the GNIS location of Golden
Tom Schweich 2077.
14 Jun 2019.
(
COLO2434660‡
KHD00073441‡
)
.
.
 Coll. No. 2077, Linaria canadensis var. texana |
Linaria dalmatica (L.) Mill. (Syn: Linaria dalmatica (L.) Mill. ssp. dalmatica , Linaria genistifolia (L.) Mill. ssp. dalmatica (L.) Maire & Petitm. ) Dalmatian ToadFlax. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon.
- Eagle Ridge, Tract A, Common in this field of remnant mixed-grass prairie, drier patch dominated by Artemisia ludoviciana, stiff clay soil. Colorado Noxious Weed List B. iNaturalist Observation 192499979. EDDMapS Record ID 11644454. City-owned parcel north of “Eagle Ridge” between CSM Survey Field and US Highway 6, about 100 m. northwest of the Kinney Run Trail, 2.35 km. (geodesic) south of the GNIS location of Golden. Tom Schweich 2981. 19 Jun 2023. ( Golden ) .
- Grampsas North Open Space (City of Golden), 3905. 12/7/2024. .
- Kinney Run South, 4468. 4/9/2026. .
- Parfet Open Space (City of Golden), 4137. 6/1/2025. .
- Heritage Dells, North Gulch, 4621. 4/23/2026. .
- Kinney Run, 4444. 3/30/2026. .
- North Hogback Open Space (City of Golden), Tom Schweich 1705. 6/14/2019. .
- North Table Mountain Open Space (City of Golden), West-facing slope with mixed grasses and forbs. Colorado Noxious Weed List B. Southwest side of North Table Mountain, along City of Golden North Table Mountain Trail, 2.6 km. north of the GNIS location of Golden. Tom Schweich 1393. 8 Jun 2016. ( CAS CDA0050048‡ JCOS s.n. KHD00063845‡ OBI83202‡ UCR277987‡ ) Highest prairie mixed with foothill shrubs, also collected nearby: Aegilops cylindrica, Hesperostipa comata, Lithospermum occidentale, Sphaeralcea coccinea, and Thinopyrum intermedium. Lower southwest slopes of North Table Mountain, on the section line between Sections 21 and 28 which for unknown reason has been plowed or otherwise disturbed, 1.95 km. north of the GNIS location of Golden. Tom Schweich 2054. 4 Jun 2019. ( EIU OBI ‡ REGIS ) .
- Parfet Prehistoric Preserve, 4003. 4/30/2025. .
- Schweich Hill, Determination tentative Tom Schweich 1511. 3/27/2017. Top of hill, among best area of native vegetation. Colorado Noxious Weed List B. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1641. 30 May 2017. ( CDA0050034‡ KHD00065491‡ ) .
- South Table Mountain Open Space (City of Golden), 6008. 5/13/2026. .
- Stonebridge Homeowners Association, Tom Schweich 3259. 6/13/2023. .
- Tripp Ranch Meadow Open Space, 2762. 6/10/2022. .
- Tucker Gulch (lower),
Tom Schweich 2902.
7/6/2022.
.
.
Penstemon Schmidel. Beard Tongue. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Prehistoric Preserve,
4019.
4/30/2025.
.
.
Penstemon secundiflorus Benth. Sidebells Penstemon. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Open Space (City of Golden), 4150. 6/1/2025. .
- Magic Mountain Archeological Site, 4348. 7/30/2025. .
- North Table Mountain Open Space (City of Golden), West-facing slope with mixed grasses and forbs. Southwest side of North Table Mountain, along City of Golden North Table Mountain Trail, 2.6 km. north of the GNIS location of Golden. Tom Schweich 1392. 8 Jun 2016. ( CAS JCOS s.n. KHD00063844‡ OBI83203‡ UC UCR277988‡ ) .
- Parfet Prehistoric Preserve, 4056. 5/12/2025. .
- Schweich Hill, Common in less-disturbed and less-invaded areas near the top of hill. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1639. 30 May 2017. ( KHD00065743‡ ) .
- Stonebridge Homeowners Association, Tom Schweich 3261. 6/13/2023. .
- Tripp Ranch Meadow Open Space,
Tom Schweich 3581.
6/8/2024.
.
.
Penstemon virens Pennell ex Rydb. Front Range Beardtongue. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Open Space (City of Golden), 4148. 6/1/2025. .
- Kinney Run, Sparsely vegetated sandstone among Cercocarpus montanus. Common Front Range Penstemon. Top of small hogback between Kinney Run and Eagle Ridge Drive, 3.01 km. south of the GNIS location of Golden. Tom Schweich 1830. 16 May 2018. ( CDA0052351‡ COLO02347540‡ EIU ) .
- North Hogback Open Space (City of Golden), In upturned rocks on the spine of the hogback, also seen or collected here: Eriogonum umbellatum, Physaria montana, Ribes cereum, Coryphantha vivipara, and Cercocarpus montanus. Southern end of the hogback in northernmost Golden, 4.19 km. north northwest of the GNIS location of Golden. Tom Schweich 2271. 9 May 2020. ( CDA0053731‡ OBI149333‡ REGIS ) .
- Parfet Prehistoric Preserve, 4069. 5/12/2025. .
- Schweich Hill, Common in less-disturbed and less-invaded areas near the top of hill. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1640. 30 May 2017. ( CS KHD00065492‡ ) .
- South Table Mountain Open Space (City of Golden), 6055. 5/13/2026. .
- Stonebridge Homeowners Association, Tom Schweich 3260. 6/13/2023. .
- Tripp Ranch Meadow Open Space,
2776.
6/10/2022.
.
.
Penstemon virgatus A. Gray var. asa-grayi (Crosswh.) Dorn. Upright Blue Beardtongue. CalPhotos. Jepson eFlora. SEINet Taxon.
- Eagle Ridge, On mesa slope in foothills. Transferred from USGS Herbarium, Denver, CO (2005). . In foothills of the Front Range, at junction of US 6 and road to Morrison, about 1 mile east of Golden. Hansford T. Shacklette 5893. 27 Jun 1959. ( COLO530263‡ ) .
- Grant Terry Open Space,
iNaturalist Observation 169430307.
steppesun 5934.
6/25/2023.
.
.
 Coll. No. 2575, Penstemon virgatus var.asa-grayi |
Plantago major L. Common Plantain. CalPhotos. Jepson eFlora. SEINet Taxon.
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2318. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 . .
Plantago patagonica Jacq. Woolly Plantain. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual, herb, to 10 cm., drying light green; Leaves, basal rosette, 55 mm. × 2.5 mm., narrowly oblanceolate, entire; Peduncle, 55 mm., not grooved, hairs ascending (not spreading), diameter >> than leaf hairs, Inflorescence, scapose, 10-12, in single terminal spikes, axis not visible between flowers; Bract, linear, 1-2 × calyx, exserted; Flower, bisexual, Corolla, lobes 1.8 mm., 1 erect, 3 spreading, tube glabrous (should be hairy); Stamens, 4, inserted; Style 1.2 mm.; Fruit, 2.5 mm Seeds 2, 1.4 mm., inner side deep concave (much easier to dissect fruit and examine seeds when dry, rather than when wetted with Pohl's solution, Described from Coll. No. 281, 24 April 2001).
- Eagle Ridge, In foothills of the Front Range, at junction of US 6 and road to Morrison, about 1 mile east of Golden. Hansford T. Shacklette 5888. 27 Jun 1959. ( COLO529553‡ ) .
- North Hogback Open Space (City of Golden), Tom Schweich 1744. 6/14/2019. .
- Stonebridge Homeowners Association,
Tom Schweich, with Ann Norton 2247.
6/12/2021.
.
.
 Coll. No. 281, Plantago patagonica |
 Coll. No. 1490, Plantago patagonica |
 Coll. No. 1882, Plantago patagonica |
Veronica anagallis-aquatica L. Water Speedwell. CalPhotos. Jepson eFlora. SEINet Taxon.
- Tucker Gulch (lower),
Flowing water of gulch lined by cottonwoods (Populus deltoides), box elders (Acer negundo) and chokecherries (Prunus virginiana).
Native to temperate Eurasia to tropical mountains; widespread non-native in North America.
Bed of Tucker Gulch, the stream that drains Golden Gate Canyon, 75 m. west of North Ford Street, 2.57 km. north northwest of the GNIS location of Golden.
Tom Schweich 2844.
6 Jul 2022.
.
.
Veronica biloba L. (Syn: Pocilla biloba (L.) W. A. Weber ) Twolobe Speedwell. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Hogback Open Space (City of Golden), Also collected nearby: in the gulch: Collinsia parviflora; above the gulch: Lupinus argenteus, Euphorbia esula, Lithospermum arvense, Poa pratensis, and Secale cereale. Northwest corner of Golden, in recently deposited silt in channel of Cressmans Gulch, 60 m. downstream from Pine Ridge Road, 4.51 km. northwest of the GNIS location of Golden. Tom Schweich 2472. 25 May 2021. ( OBI185090‡ ) .
- Tucker Gulch (lower),
Also collected nearby: Lithospermum arvense, Alliaria petiolata, Lunaria annua, and Fumaria vaillantii.
In a sunny spot beside the city of Golden Tucker Gulch Trail, between 1st Street and 7th Place, 1.54 km. north northwest of the GNIS location of Golden.
Tom Schweich 2482.
27 May 2021.
(
COLO2707305‡
UCR
)
.
 Veronica biloba L. |
 Veronica biloba L. |
 Fruit of Coll. No. 2063.1, Veronica biloba |
 Coll. No. 2063.1, Veronica biloba |
Polemoniaceae
Gilia . Gilia. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Open Space (City of Golden),
same as that seen on Tin Cup Ridge
4160.
6/1/2025.
.
.
 Coll. No. 4.1, Gilia |
Ipomopsis spicata (Nutt.) V.E. Grant. (Syn: Gilia spicata Nutt. var. spicata ) Spiked Ipomopsis. CalPhotos. Jepson eFlora. SEINet Taxon.
- Deadman Gulch,
Northeast-facing slope, more open stoney ground, on what appears to be a southeast to northwest trend approximating the trend of Eagle Ridge to the southeast.
Above the watercourse locally named “Kinney Run,” between US Highway 6 and Eagle Ridge Drive, 110 m. northwest of Kinney Run Trail, 3.17 km. south of the GNIS location of Golden.
Tom Schweich 2044.1
2 Jun 2019.
(
KHD00074450‡
)
Northeast-facing slope, more open stoney ground, on what appears to be a southeast to northwest trend approximating the trend of Eagle Ridge to the southeast.
Same as Coll. No. 2044.1. A little beaten down by recent hail.
Above the watercourse locally named "Kinney Run," between US Highway 6 and Eagle Ridge Drive, 140 m. northwest of Kinney Run Trail, 3.17 km. south of the GNIS location of Golden. Very near the boundary of the Colorado School of Mines Survey Field.
Tom Schweich 2045.
2 Jun 2019.
(
OBI183252‡
UCR297652‡
)
.
.
 Coll. No. 3243, Ipomopsis spicata. |
Phlox multiflora A. Nelson. Mountain Phlox. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial, tufted, decumbent to ascending, 7-10 cm.; Internodes, 8-9 mm.; Leaves, cauline, opposite, 23 mm. × 2 mm. wide, ±linear, sharp-pointed; Flowers, solitary at ends of stems, pedicels, 12 mm., hairy, calyx, tube 5 mm. + lobes 6 mm., sparsely hairy, hyaline membranes flat; corolla, tube 14 mm + lobes 11 mm. × 7 mm. wide, color (not recorded), fading blue. Described from Coll. No. 1653, 1 Jun 2011.
- North Hogback Open Space (City of Golden),
Determination tentative.
Tom Schweich 2474.
4/26/2022.
Determination tentative.
Tom Schweich 2475.
4/26/2022.
.
 Location of Coll. No. 2487, Phlox multiflora |
 Coll. No. 1814, Phlox, tentatively determined as P. multiflora. |
 Coll. No. 1653, Phlox multiflora |
Polygonaceae
Eriogonum alatum Torrey in L. Sitgreaves, Rep. Exped. Zuni Colorado Rivers. 168, plate 8. 1853. (Syn: Pterogonum alatum (Torr.) Gross ) Winged Buckwheat. CalPhotos. Jepson eFlora. SEINet Taxon.
- Eagle Ridge, just east of the top of the ridge. Tom Schweich 2000. 8/28/2020. .
- Grampsas North Open Space (City of Golden), 3918. 12/7/2024. 4284. 7/25/2025. in fruit 4404. 9/15/2025. .
- Parfet Open Space (City of Golden), 4264. 7/16/2025. .
- North Hogback Open Space (City of Golden), many little black bugs with red spots 4272. 7/20/2025. Tom Schweich 1726. 6/14/2019. Foothills grassland, below any significant concentration of shrubs, also collected here: Rhus trilobata, Tragia ramosa, Grindelia squarrosa, and Gutierrezia sarothrae. Northwesternmost city limits of Golden, west side of Dakota Ridge (North Hogback), about 1/4 of the way up the west slope from Cressmans Gulch, 2.65 km. north northwest of the GNIS location of Golden. Tom Schweich 2398. 29 Jul 2020. ( CS UC ) .
- Schweich Hill, Tom Schweich 1523. 3/27/2017. .
- Stonebridge Homeowners Association,
Tom Schweich, with Ann Norton 2248.
6/12/2021.
.
.
Eriogonum arcuatum Greene, Pittonia. 4: 319. 1901. var. arcuatum. (Syn: E. bakeri Greene , E. jamesii Benth var. flavescens S. Watson ) Baker's Buckwheat. CalPhotos. Jepson eFlora. SEINet Taxon.
- Schweich Hill,
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue. Center of parcel, top of hill.
Tom Schweich 1708.
14 Jul 2017.
(
KHD00065587‡
)
.
.
 Coll. No. 3476, Eriogonum arcuatum var. arcuatum. |
Eriogonum effusum Nuttall, Proc. Acad. Nat. Sci. Philadelphia. 4: 15. 1848. Spreading Buckwheat. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, woody at base, to 30 cm., Stem, floccose; Leaves, cauline, petiole 5 mm. + blade 20-25 mm. × 2-6 mm. wide, generally tomentose, except less so adaxially, ±flat, margin entire, , withered at flowering; Inflorescence, open cyme; Involucre, 1 per node, 2 mm., tomentose; Perianth, without stipe; Tepals, 1.8 mm., white to pink, described as yellow in Ackerfield (2015) and FNAMN; Achene, unknown. (Described from Coll. No. 1507.1, 22 Jul 2016, Coll. Nos. 1537 & 1541, 18 Aug 2016.)
- Eagle Ridge, Flowers not quite open. Tom Schweich 1992. 8/17/2020. .
- Grampsas North Open Space (City of Golden), 3900. 12/7/2024. 4311. 7/25/2025. .
- Parfet Open Space (City of Golden), 4154. 6/1/2025. .
- Parfet Prehistoric Preserve, 4031. 4/30/2025. .
- Schweich Hill, Tom Schweich 1512. 3/27/2017. Center of parcel, slight southwest slope. (Most of the flowers will be found in the fragment packets.) Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1756. 31 Aug 2017. ( CAS KHD00065161‡ UCR ‡ ) Remnant mixed-grass prairie, also collected nearby: Hymenopappus filifolius, Senecio spartioides, Oxytropis lambertii, and Carex inops var. heliophila. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 2.31 km. north northwest of the GNIS location of Golden. Near top of hill, central part of the parcel. Tom Schweich 2232. 12 Sep 2019. ( CDA0052317‡ COLO2433605‡ OBI186060‡ REGIS ) .
- South Table Mountain Open Space (City of Golden), 6044. 5/13/2026. .
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2329. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 Tom Schweich, with Ann Norton 2249. 6/12/2021. .
- Tripp Ranch Meadow Open Space,
Tom Schweich 3583.
6/8/2024.
.
.
 Eriogonum effusum along trail at Red Rocks |
 Eriogonum effusum along trail at Red Rocks |
 Voucher of Coll. No. 2431.1, Eriogonum effusum |
 Coll. No. 3192, Eriogonum effusum. |
Eriogonum umbellatum Torrey, Ann. Lyceum Nat. Hist. New York. 2: 241. 1827. Sulphur-Flower Buckwheat. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Open Space (City of Golden), 4107. 6/1/2025. .
- Magic Mountain Archeological Site,
4324.
7/30/2025.
.
.
 Habitat of Coll. No. 1445, Eriogonum umbellatum |
Eriogonum umbellatum Torr. var. umbellatum. Sulphur-Flower Buckwheat. CalPhotos. Jepson eFlora. SEINet Taxon.
Type collected “near the Rocky Mountains” by Edwin James, 1820. Described by Torrey in 1827.
- Eagle Ridge, On mesa slope in foothills. Notes: Transferred from USGS Herbarium, Denver, CO (2005) United States, Colorado, Jefferson, In foothills of the Front Range, at junction of US 6 and road to Morrison, about 1 mile east of Golden. Handsford T. Shacklette 5886. 27 Jun 1959. ( COLO529545‡ ) .
- North Hogback Open Space (City of Golden), likely var. umbellatum Tom Schweich 1742. 6/14/2019. Open herbaceous vegetation, ponderosa pines and mountan mahogany shrubland nearby. Also collected here: Heterotheca villosa, Hesperostipa comata, and Koeleria macrantha. Hogback at the northern city limits of Golden, more or less flat area on top of ridge, 4.38 km. north northwest of the GNIS location of Golden. Tom Schweich 2357. 12 Jun 2020. ( COLO2434157‡ OBI149316‡ ) .
- South Table Mountain Open Space (City of Golden), 6040. 5/13/2026. 6056. 5/13/2026. .
- Stonebridge Homeowners Association, var. umbellatum assumed Tom Schweich, with Ann Norton 2250. 6/12/2021. .
- Tripp Ranch Meadow Open Space, 2749. 6/10/2022. .
- Welch Ditch,
Also collected here: Aletes acaulis, Comandra umbellata subsp. pallida, Physocarpus monogynus, and Sedum lanceolatum.
Popular rock-climbing area with heavy daily use.
Along the former Welch Ditch, south side of Clear Creek, growing in rocks on slope above the ditch, just inside the mouth of Clear Creek Canyon, 2.58 km. west southwest of the GNIS location of Golden.
Tom Schweich 2312.1
3 Jun 2020.
(
CDA0053745‡
EIU
JCOS s.n.
KHD00072985‡
)
.
.
Fallopia baldschuanica (Regel) Holub. Bukhara Fleeceflower. CalPhotos. Jepson eFlora. SEINet Taxon.
- Tucker Gulch (lower),
4394.
9/8/2025.
Sprawling over a green ash (Fraxinus pennsylvanica Marshall) and fence for about 10 m., coming across onto the City of Golden Tucker Gulch Trail, no sign of rooting away from fence line.
Also seen on top of Cemetery Hill (Gregory Drive), and 1000 19th Street.
iNaturalist Observation 185490713.
EDDMapS Record ID 11556331.
Side yard of 405 Garden Glen Ct., Colden, CO.
Tom Schweich 3230.
29 Sep 2023.
(
CDA56581‡
CS202037‡
JCOS
KHD ‡
OBI
)
.
.
Fallopia convolvulus (L.) A.Löve. (Syn: Polygonum convolvulus L. ) Black Bindweed. CalPhotos. Jepson eFlora. SEINet Taxon.
- Stonebridge Homeowners Association, Tom Schweich 3262. 6/13/2023. . .
Fallopia japonica (Houtt.) Ronse Decr. (Syn: Polygonum cuspidatum Siebold & Zucc. , Reynoutria japonica Houtt. ) Japanese Knotweed. Weed: CO DofA, List: A. CalPhotos. Jepson eFlora. SEINet Taxon.
- Kinney Run, under treatment by City of Golden 2946. 8/27/2022. . .
Rumex acetosella L. (Syn: Acetosella vulgaris (K. Koch) Fourr. , R. angiocarpus Murb. ) Sheep Sorrel. CalPhotos. Jepson eFlora. SEINet Taxon.
Coll. No. 1841, 17 May 2018, characters observed: Perennial herb from woody rootstock, to 30 cm., dioecious (all plants in this collection staminate); Leaves, basal and cauline similar, ocrea, 7-10 mm., petiole 20 mm. + blade 12-24 mm. × 6 mm. wide, base hastate, lobes pointing outward, tip acuminate; Pedicels, 1-3 mm.; Flowers, bulbar-like base, described as stipe-like, but does not look stipe-like such as that seen in Eriogonum umbellatum; Pedicels, 1-3 mm.; Tepals, #6, 1.7 mm., reddish (Described from Coll. No. 1841, 17 May 2018).
- Cressmans Gulch,
Tom Schweich 1946.
6/12/2020.
.
.
 Coll. No. 2079, Rumex acetosella |
 Inflorescence of Coll. No. 1841, Rumex acetosella |
 Coll. No. 1841, Rumex acetosella |
Rumex crispus L. Curley Dock. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space, 5961. 5/11/2026. .
- Cressmans Gulch, 4556. 4/15/2026. 4582. 4/15/2026. .
- Grampsas North Open Space (City of Golden), 3903. 12/7/2024. .
- Kinney Run South, 4489. 4/9/2026. .
- Parfet Open Space (City of Golden), 4116. 6/1/2025. .
- South Illinois Open Space, 3939. 12/20/2024. .
- Grant Terry Open Space, iNaturalist Observation 162306095. chelseasg 5954. 5/18/2023. .
- Heritage Dells, North Gulch, 4605. 4/23/2026. 4653. 4/23/2026. .
- Heritage Dells, South Gulch, 4496. 4/9/2026. 6121. 6/1/2026. .
- Magic Mountain Archeological Site, 4325. 7/30/2025. .
- North Hogback Open Space (City of Golden), 4528. 4/11/2026. .
- North Table Mountain Open Space (City of Golden), Small wetland where the North Table Mountain Trail crosses a watercourse below a near-perennial spring that is higher on the south slope of the mesa. Introduced. Lower south slopes of North Table Mountain, above Peery Parkway, 250 m. south of the USBR monument “North Table,”1.25 km. north of the GNIS location of Golden. Tom Schweich 1531. 5 Aug 2016. ( JCOS s.n. KHD00063562‡ ) .
- Parfet Prehistoric Preserve, 3995. 4/30/2025. .
- Schweich Hill, Determination tentative. Tom Schweich 1528. 3/27/2017. .
- South Table Mountain Open Space (City of Golden), 6019. 5/13/2026. .
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2330. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 Tom Schweich, with Ann Norton 2251. 6/12/2021. .
- Tripp Ranch Meadow Open Space, Tom Schweich 3582. 6/8/2024. .
- Welch Ditch (Open Space),
4682.
4/25/2026.
.
.
 Coll. No. 2817, Rumex crispus |
 Coll. No. 818, Rumex crispus |
Rumex venosus Pursh. Veiny Dock. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Hogback Open Space (City of Golden),
Tom Schweich 1694.
6/14/2019.
.
 Rumex venosus by the Middle Loup River. |
Ranunculaceae
Clematis L. Clematis. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Prehistoric Preserve, nativity undetermined 4027. 4/30/2025. . .
Clematis ligusticifolia Nutt. Western White Clematis. CalPhotos. Jepson eFlora. SEINet Taxon.
- Eagle Ridge, Also collected in these pits: Clematis orientalis and Humulus lupulus var. neomexicana. Vegetation outside the pits is foothills shrubland, including Cercocarpus montanus and Holodiscus dumosa. In a pit of a former mine on the east side of the locally named “Eagle Ridge,” 430 m. west of the intersection of US Highway 6 and Heritage Road, 3.70 km. south of the GNIS location of Golden. Tom Schweich 2420. 17 Aug 2020. ( CAS1125296‡ KHD00072962‡ OBI186039‡ UCR ) .
- Parfet Open Space (City of Golden), 4144. 6/1/2025. Also collected here: Juncus torreyi. Designated a City of Golden Open Space in July 2025. Western edge of Parfet Open Space, growing around a small perennial spring, 1.16 km. southwest of the GNIS location of Golden. Tom Schweich 3452. 16 Jul 2025. ( CS EIU FLD REGIS ) .
- Grant Terry Open Space, iNaturalist Observation 224428785. geoskimom 5956. 6/21/2024. .
- Kinney Run, Beside Deadman Gulch, locally euphemistically called Kinney Run, between Eagle Ridge Drive and US Highway 6, 2.62 km. south southeast of the GNIS location of Golden. Tom Schweich 1970. 6 Jul 2018. ( COLO02348316‡ JCOS s.n. KHD00068923‡ OBI170766‡ UC ) .
- South Table Mountain Open Space (City of Golden),
6054.
5/13/2026.
.
.
 Coll. No. 1970, Clematis ligustifolia |
Clematis orientalis L. Oriental Virginsbower. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon.
- Eagle Ridge,
in a partially filled open pit mine.
Tom Schweich 2001.
8/28/2020.
In a pit of a former mine on the east side of the locally named “Eagle Ridge,” 430 m. west of the intersection of US Highway 6 and Heritage Road, 3.70 km. south of the GNIS location of Golden.
Tom Schweich 2419.1
17 Aug 2020.
(
Sterile, discarded.
)
Also found in this pit: Humulus lupulus var. neomexicanus; Clematis ligusticifolia in the next pit to the north, vegetation just outside the pit is foothills shrubland above grassland.
Colorado Noxious Weed List B
In a former mine pit on the east side of “Eagle Ridge,” an informal name for a hogback between US Highway 6 and Eagle Ridge Drive, 3.76 km. south southeast of the GNIS location of Golden.
Tom Schweich 2437.
28 Aug 2020.
(
COLO2434074‡
KHD00072976‡
)
.
.
Delphinium carolinianum Walter ssp. virescens (Nutt.) R.E. Brooks. (Syn: D. carolinianum Walter ssp. penardii (Huth) L. M. Perry , Delphinium virescens Nutt. ) Plains Larkspur. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Open Space (City of Golden), 4158. 6/1/2025. .
- North Hogback Open Space (City of Golden), Within a band of foothills mountain mahogany shrubland likely aligned with underlying strata; collected nearby: Potentilla recta and Muhlenbergia montana. Hogback at the northern city limits of Golden, 3/4 of the way up the west-facing slope, 4.37 km. north northwest of the GNIS location of Golden. Tom Schweich 2359. 12 Jun 2020. ( UC ) .
- Schweich Hill, Only one plant seen. Tom Schweich 1562. 5/30/2017. Top of hill where there is less disturbance and fewer invasive weeds. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1661. 16 Jun 2017. ( KHD00065339‡ UCR ‡ ) .
- Stonebridge Homeowners Association,
Tom Schweich, with Ann Norton 2252.
6/12/2021.
.
.
 Coll. No. 2359, Delphinium carolinianum subsp. virescens |
 Coll. No. 1440, Delphinium carolinianum subsp. virescens |
 Coll. No. 1661, Delphinium carolinianum subsp. virescens |
Delphinium geyeri Greene. Geyer's Larkspur. CalPhotos. Jepson eFlora. SEINet Taxon.
- Eagle Ridge, On mesa slope in foothills. Foothills of the Front Range, at junction of US 6 and road to Morrison, about 1 mile east of Golden. Hansford T. Shacklette 5885. 27 Jun 1959. ( COLO529781‡ ) . .
Delphinium nuttallianum Pritz. Twolobe Larkspur. CalPhotos. Jepson eFlora. SEINet Taxon.
- Cressmans Gulch, 4577. 4/15/2026. .
- Eagle Ridge, Tom Schweich 3179. 5/28/2023. .
- Heritage Dells, North Gulch, 4642. 4/23/2026. .
- Kinney Run, determination tentative 4459. 3/30/2026. .
- Magic Mountain Archeological Site, Heritage Dells area, 47 m. east of the Kinney Run Trail, in thin soil on top of a very low hogback, 4.34 km. south of the GNIS location of Golden Tom Schweich 1787.1 18 Apr 2018. ( COLO02348068‡ ) .
- Stonebridge Homeowners Association,
Tom Schweich 3263.
6/13/2023.
.
.
Ranunculus acris L. Tall Buttercup. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 30 cm., aquatic; Leaves, mostly basal with few cauline, compound, deeply parted, margins toothed; Petioles, spreading hairs; Flowers, actinomorphic, sepals, present, 9 mm. × 2.5 mm. wide, ovate, hairy, white/translucent, petals, yellow, 17 mm. × 12.5 mm. wide, obovate, notched, not spurred; Pistil, many; Achenes, immature, small, glabrous, abruptly curved short beak (Described from Coll. No. 2274, 12 May 2020).
- Tucker Gulch (lower),
Rooted in the lowest bank of the creek. Also collected nearby: Chorispora tenella, Euphorbia esula, Alopecurus arundinaceus, and Poa bulbosa.
Creekside just below the First Street Bridge, 1.69 km. north northwest of the GNIS location of Golden
Tom Schweich 2274.
12 May 2020.
(
CAS
CDA0053733‡
COLO2433746‡
KHD00072972‡
OBI149335‡
UCR
)
.
.
 Coll. No. 2274, Ranunculus sp. |
 More Ranunculus sp. Nearby. |
 Coll. No. 2274, Ranunculus acris |
 Coll. No. 3287, Ranunculus acris. |
 Flower of Coll. No. 2274, Ranunculus acris |
Ranunculus repens L. Creeping Buttercup. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, terrestrial of wet habitat, not alpine, appressed to spreading hairy throughout; Leaves, basal, petiole to 26 cm., 8 cm. × 10 cm. wide, ternately compound, divided once again, then lobed, cauline, distributed along stem, alternate, compound; Flowers, radially symmetric, Sepals, spreading (not reflexed), 9 mm., long straight hairy; Petals, #5, 16 mm. × 12 mm. wide, yellow, not spurred, nectary scale free ≥½ length; Pistils many; Style absent; Achenes, (immature) 1.5 mm., beak straight to slightly curved (Described from Coll. No. 1333, 11 May 2016).
- Tucker Gulch (lower),
In a small slump beside creek.
135 m. north of First Street bridge, 1.46 km north northwest of the GNIS location of Golden
Tom Schweich 1333.
11 May 2016.
(
CS
KHD ‡
UCR
)
.
 Coll. No. 2957, Ranunculus repens. |
 Coll. No. 1333, Ranunculus repens |
 Basal leaf of Coll. No. 1333, Ranunculus repens |
Rhamnaceae
Rhamnus cathartica L. European Buckthorn. Weed: CO DofA, List: Unlisted. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space, 5982. 5/11/2026. .
- Deadman Gulch, With Salix exigua and Prunus virginiana. Also locally called “Kinney Run,” in a triangular city parcel along the projection of Illinois Street below US Highway 6. Tom Schweich 2925. 28 May 2023. ( Golden ) With Salix exigua and Prunus virginiana. Same plant as Coll. No. 2925. EDDMapS Record ID 11613828. Also locally called “Kinney Run,” in a triangular city parcel along the projection of Illinois Street below US Highway 6. Tom Schweich 2991. 19 Jun 2023. ( Golden ) .
- Kinney Run,
6266.
7/9/2026.
Determination tentative, needs to be verified in spring.
Tom Schweich 2961.
11/10/2022.
.
Rosaceae
Amelanchier alnifolia (Nutt.) Nutt. ex M. Roem. Saskatoon Serviceberry. CalPhotos. Jepson eFlora. SEINet Taxon.
Shrub, to 1 m.; Stems, branches unarmed; Leaves, simple, petiole, 8 mm., blade, 22-32 mm. × 19-32 mm. wide, veins, pinnate, surface, sparsely hairy above, sparsely to moderately hairy below, margin, serrate; Flowers, borne singly, pedicels, 10 mm., petals 9 mm. × 4.5 mm. wide, color cream; Ovary, inferior, tip hairy; Styles, #(4)5 (Described from Coll. No. 1800-1801, 7 May 2018)
- Parfet Open Space (City of Golden), 4255. 7/16/2025. .
- Grant Terry Open Space, iNaturalist Observation 160407983. jeremy887 5882. 5/7/2023. .
- Kinney Run, 4447. 3/30/2026. .
- Magic Mountain Archeological Site, 4350. 7/30/2025. .
- North Hogback Open Space (City of Golden), Above the mixed-grass prairie just into foothills mountain mahogany shrubland; collected here: Ribes cereum, Cercocarpus montanus, and Potentilla recta; nearby: Lomatium orientale, and Scutellaria brittonii. Southern end of the hogback in northernmost Golden, 4.16 km. north northwest of the GNIS location of Golden. Tom Schweich 2267. 9 May 2020. ( CAS KHD00072472‡ ) .
- South Table Mountain Open Space (City of Golden), 6041. 5/13/2026. 6048. 5/13/2026. .
- Stonebridge Homeowners Association,
Tom Schweich 3264.
6/13/2023.
.
.
Cercocarpus montanus Raf. Alder-Leaf Mountain Mahogany. CalPhotos. Jepson eFlora. SEINet Taxon.
Described by Rafinesque from a specimen collected by Edwin James of the Long Expedition, 1820, probably in present Jefferson County, Colorado. Rafinesque was somewhat frustrated by Torrey's reluctance publish a new species name in assigning James' collection to C. fothergillides Humb. Bonpl. And Kunth.
- Eagle Ridge, On mesa slope in foothills. Transferred from USGS Herbarium, Denver, CO (2005). Foothills of the Front Range, at junction of US 6 and road to Morrison, about 1 mile east of Golden. Hansford T. Shacklette 5895. 27 Jun 1959. ( COLO529842‡ ) Tom Schweich 3175. 5/28/2023. .
- Kinney Run South, 3970. 1/3/2025. 4465. 4/9/2026. .
- Parfet Open Space (City of Golden), 4132. 6/1/2025. .
- Heritage Dells, South Gulch, 4503. 4/9/2026. .
- Kinney Run, Tom Schweich 1629. 7/6/2018. .
- Magic Mountain Archeological Site, 4334. 7/30/2025. .
- North Hogback Open Space (City of Golden), Tom Schweich 1731. 6/14/2019. Foothills shrubland, primarily C. montanus, with Ribes cereum, Rhus trilobata, and Amelanchier alnifolia, and forbs: Physaria montana, Penstemon virens, and Viola nuttallii, Southern end of the hogback in northernmost Golden, 4.17 km. north northwest of the GNIS location of Golden. Tom Schweich 2270.1 9 May 2020. ( OBI149331‡ UCR ) .
- South Table Mountain Open Space (City of Golden), 6030. 5/13/2026. 6058. 5/13/2026. .
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2331. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 Tom Schweich, with Ann Norton 2253. 6/12/2021. .
- Tripp Ranch Meadow Open Space,
2771.
6/10/2022.
.
.
Cotoneaster lucidus Schltdl. Hairy Stem Cotoneaster. CalPhotos. Jepson eFlora. SEINet Taxon.
- Heritage Dells, South Gulch, 6135. 6/1/2026. .
- Kinney Run, 6267. 7/9/2026. .
- Welch Ditch, Plants first recognized in the field by Cindy Trujillo. EDDMapS Record ID 12009770. Along the former Welch Ditch, south side of Clear Creek, in a small gulch south of and above the ditch, just inside the mouth of Clear Creek Canyon, 2.37 km. west southwest of the GNIS location of Golden. Tom Schweich 2315. 3 Jun 2020. ( COLO2434355‡ CS198718‡ JCOS s.n. KHD 72995‡ ) .
- Welch Ditch (Open Space),
4683.
4/25/2026.
4693.
4/25/2026.
4711.
4/25/2026.
.
.
 Where I found Cotoneaster lucidus -- thanks to Cindy. |
 Coll. No. 2315, Cotoneaster lucidus |
Crataegus . Hawthorn. CalPhotos. Jepson eFlora. SEINet Taxon.
- Cottonwood Natural Area, 3947. 12/27/2024. .
- Kinney Run South, 3975. 1/3/2025. . .
Crataegus erythropoda Ashe. Cerro Hawthorn. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Open Space (City of Golden), determination tentative 4133. 6/1/2025. .
- Heritage Dells, North Gulch, 4611. 4/23/2026. 4651. 4/23/2026. .
- Magic Mountain Archeological Site,
4326.
7/30/2025.
.
.
 Coll. No. 2930, Crataegus erythropoda. |
Crataegus succulenta Schrad. ex Link. Fleshy Hawthorn. CalPhotos. Jepson eFlora. SEINet Taxon.
- Kinney Run,
Tom Schweich 1641.
7/6/2018.
.
.
 E. L. Greene collection of Crataegus succulenta |
 General appearance of Coll. No. 1455, Crataegus succulenta |
 Fruit of Coll. No. 1462, Crataegus succulenta |
 Coll. No. 2061, Crataegus succulenta |
Drymocallis fissa (Nutt.) Rydb. (Syn: Potentilla fissa Nutt. ex Torr. & A.Gray ) CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial, herb, caespitose, to 20 cm., terrestrial, not stoloniferous, rhizomatous, glandular-hairy throughout; Stem, erect, green, multicellular viscid hairs; Leaves, basal, 58-125 mm. × 16-26 cm. wide, pinnately compound, leaflets, #11; cauline, #3-4 per stem, alternate, stipules, 5 mm. × 2 mm. wide, lanceolate, entire to once shallowly toothed; petiole, 18 mm., prior years remaining on plant (as sometimes described for P. rupincola), multicellular viscid hairs, leaflets, #7-13, 40-51 mm. × 20-22 mm. wide, petiolulate (not decurrent), 12 mm. × 9 mm. wide, viscid hairy, terminal leaflet (8)10 mm. side, margin, flat, serrate, teeth, 4-6 per side, on distal ¾, tip dark reddish; Inflorescence, congested cyme, with 5-7 flowers; Flowers, limb, 15 mm.; Calyx, lobes, #5, 7-11 mm. × 2.7-4.5 mm. wide, fused ±½, viscid hairy, epicalyx bractlets, 3-5 mm. × 0.8-1.3 mm. wide, ±½ sepals; Receptacle, hairy, <1 mm., Petals, 7-9 mm. × 5-9 mm. wide, obovate, color yellow; Stamens, >25; Anthers, 1.4 mm. × 1 mm. wide; Ovaries, many, superior, glabrous; Styles, widest at middle, or thickest at base, tapered from middle, attached laterally below top of ovary; Stigma, #1; Achenes, glabrous. (Described from Coll. No. 1364, 21 May 2016, and Coll. No. 1911, 31 May 2018).
- Eagle Ridge, Tom Schweich 3174. 5/28/2023. .
- Kinney Run South, 3982. 1/3/2025. .
- Heritage Dells, North Gulch, 4639. 4/23/2026. .
- North Hogback Open Space (City of Golden), Mostly mixed grasses and forbs just below the Cercocarpus montanus belt, with Celtis reticulata, Rhus trilobata, Thermopsis rhombifola var. divaricarpa, Grindelia squarrosa, and Gutierrezia sarothrae. In fractures in rocks of an outcrop identified by a local geologist as Lykins conglomerate. Northwestern corner of Golden, south end of Dakota Ridge, a hogback that is structurally a continuation of Dinosaur Ridge, west limb at the south end on a small parcel owned by the City of Golden, 4.30 km. north northwest of the GNIS location of Golden. Tom Schweich 2476. 25 May 2021. ( Golden ) .
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2332. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 Tom Schweich, with Ann Norton 2254. 6/12/2021. .
- Tripp Ranch Meadow Open Space,
2782.
6/10/2022.
.
.
 Coll. No. 1099, Drymocallis fissa |
 Coll. No. 1099, Drymocallis fissa |
 Coll. No. 1911, Drymocallis fissa |
Fallugia paradoxa (D. Don) Endl. Apache Plume. CalPhotos. Jepson eFlora. SEINet Taxon.
- South Illinois Open Space, 3944. 12/20/2024. .
- Stonebridge Homeowners Association,
horticultural
Tom Schweich 3299.
6/21/2023.
.
.
Geum macrophyllum Willd. Large-leaf Avens. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 50 cm., plant drying green; Leaves, upper stem leaves divided near to base; Sepals 5; Hypanthium bractlets (not visible); Petals 5 (not visible); Style continuous to fruit, 3 mm., hooked, not plumose, without bristles, non-glandular; Fruit, many per flower, 2.5 mm (Described from Coll. No. 438.1, 12 Nov 2012, var. perincisum considered indistinct).
- Stonebridge Homeowners Association,
Tom Schweich 3300.
6/21/2023.
.
.
 Geum macrophyllum growing beside a spring. |
 Overview of Collection No. 560 |
 Detail of Coll. No. 685, Geum macrophyllum |
Holodiscus discolor (Pursh) Maxim. var. dumosus (S. Watson) Maxim. Ex J. M. Coult. (Syn: H. dumosus (Nutt. ex Torr. & A.Gray) A.Heller ) Rock Spiraea. CalPhotos. Jepson eFlora. SEINet Taxon.
- Eagle Ridge, Tom Schweich 1982. 7/24/2020. Tom Schweich 3178. 5/28/2023. Tom Schweich 3180. 5/28/2023. .
- Welch Ditch, Steep slopes above and below the former Welch Ditch, south side of Clear Creek, just inside the mouth of Clear Creek Canyon, 1.87 km. west southwest of the GNIS location of Golden. Tom Schweich 2318. 3 Jun 2020. ( JCOS s.n. KHD 72968‡ ) . .
Malus L. Apple. CalPhotos. Jepson eFlora. SEINet Taxon.
- Grampsas North Open Space (City of Golden), 3906. 12/7/2024. . .
Malus domestica (Suckow) Borkh. Common Apple. CalPhotos. Jepson eFlora. SEINet Taxon.
- Heritage Dells, North Gulch, 4601. 4/23/2026. .
- Welch Ditch (Open Space),
4692.
4/25/2026.
.
.
 Flowers of Coll. No. 3548, Malus domestica. |
 Coll. No. 3548, Malus domestica. |
 Coll. No. 3548, Malus domestica. |
Physocarpus monogynus (Torr.) J.M. Coult. (Syn: Spiraea monogyna Torr. ) Mountain Ninebark. CalPhotos. Jepson eFlora. SEINet Taxon.
Shrub, height unknown (growing in ravine); Leaves, alternate, simple, hairs stellate, petiole, 10 mm., blade, 30 mm. × 33 mm. wide, ovate, palmate-veined, doubly crenate; Inflorescence, umbellate corymb, ±20-flowered; Pedicels, 8-12 mm.; Flowers, limb, 12 mm., petals, 4.5 mm., color cream; Styles, 2 (Described from Coll. No. 1397, 8 June 2016).
- North Table Mountain Open Space (City of Golden), Moist shady west-facing ravine. Southwest side of North Table Mountain, along City of Golden North Table Mountain Trail, 2.5 km. north of the GNIS location of Golden. Tom Schweich 1397. 8 Jun 2016. ( CS JCOS s.n. KHD00063959‡ OBI83200‡ ) .
- Stonebridge Homeowners Association, Tom Schweich 3265. 6/13/2023. .
- Tripp Ranch Meadow Open Space, 2789. 6/10/2022. On ridge near top of and entrance to parcel. Also here: Artemisia frigida, Artemisia ludoviciana, Grindelia squarrosa, Senecio integerrimus, Opuntia macrorhiza, O. polyacantha, Eriogonum umbellatum, Cercocarpus montanus, and Potentilla fissa High mixed-grass prairie at base of Rocky Mountain Front Range. Very small (1.67 ac.) City of Golden-owned open space, adjacent to Jefferson County Open Space (Apex Park) and Stonebridge HOA common area, accessed by narrow passage from Crawford Street, 3.44 km. south of the GNIS location of Golden. Tom Schweich 3247. 8 Jun 2024. ( EIU FLD ) .
- Welch Ditch,
Also collected here: Aletes acaulis, Comandra umbellata subsp. pallida, Eriogonum umbellatum var. umbellatum, and Sedum lanceolatum.
Popular rock-climbing area with heavy daily use.
Along the former Welch Ditch, south side of Clear Creek, growing in rocks on slope above the ditch, just inside the mouth of Clear Creek Canyon, 2.58 km. west southwest of the GNIS location of Golden.
Tom Schweich 2312.2
3 Jun 2020.
(
EIU
JCOS s.n.
KHD00072483‡
OBI149350‡
)
.
.
Potentilla L. Cinquefoil. CalPhotos. Jepson eFlora. SEINet Taxon.
- Heritage Dells, South Gulch, palmate leaves 4495. 4/9/2026. .
- Magic Mountain Archeological Site,
Tom Schweich 1660.
4/18/2018.
.
.
 Accidental Coll. No. 1473.1, Potentilla sp. |
Potentilla recta L. Sulphur Cinquefoil. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 50 cm., hairy throughout, short (0.3 mm.) hairs glandular, long (4 mm.) hairs straight spreading eglandular; Leaves, stem, 7-8 per stem, alternate, stipules, to 20 mm., lobed, petioles, to 80 mm., blade, palmately compound, leaflets, #5, 45 mm. × 14 mm. wide, lobed ½ to mid-rib, progressively reduced above; Calyx, 9 mm. × 9 mm. wide, flattened at base; Petals, 8 mm., yellow; Style, 1.3 mm., tapered throughout, not appearing warty; Achene, 1 mm., attached laterally, reticulate in color, but not texture. Described from Coll. No. 1680, 28 June 2017. “The long, stiff, spreading, tubercle-based hairs on stems and petioles of P. recta, overtopping a layer of short hairs and glands, also serve to distinguish this aggressive species from native P. gracilis at any stage of the life cycle (FNANM).”
- Grampsas North Open Space (City of Golden), 4314. 7/25/2025. .
- Heritage Dells, South Gulch, 6146. 6/1/2026. .
- Magic Mountain Archeological Site, Also collected here: Berteroa incana, Vicia villosa, and Verbascum thapsus. This area was extensively collected by E. H. Brunquist in 1959-1960 during the Peabody Museum excavation at Magic Mountain. P. recta was not collected at that time. Colorado Noxious Weed List B. Terrace on the north bank of Apex Gulch, between Fire Station 4 and the Kinney Run Trail bridge, 5.73 km. south of the GNIS location of Golden. Tom Schweich 2131. 8 Jul 2019. ( CAS CS KHD00072744‡ REGIS ) .
- North Hogback Open Space (City of Golden), One plant with last year's inflorescence; removed. Tom Schweich 1835. 5/9/2020. Tom Schweich 1945. 6/12/2020. .
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2333. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 Tom Schweich, with Ann Norton 2255. 6/12/2021. .
- Tripp Ranch Meadow Open Space,
Tom Schweich 3585.
6/8/2024.
.
.
 Coll. No. 1680, Potentilla recta |
Prunus . Horticultural Prunus. CalPhotos. Jepson eFlora. SEINet Taxon.
- Welch Ditch (Open Space), 4727. 4/25/2026. . .
Prunus americana Marshall. American Plum. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial woody shrub, spreading, to 2 m., blooming before leafing out; Branches, unarmed, glabrous when young, peeling to brown; Leaves, (immature, at time of flowering), simple, 15-19 mm. × 5.5-8 mm. wide, lanceolate or elliptic-rhomboid, pinnately veined, glabrous, margin toothed, teeth eglandular, base slightly hairy, petiole 3 mm., adaxially hairy; Flowers, in small groups of 2-3; Pedicels, 9-18 mm., glabrous to sparsely hairy; Hypanthium, 2 mm.; Sepals, 2.5-2.8 mm., reflexed, few cobwebby hairs adaxially; Petals, free, white, 5-7 mm. × 2.5-4.5 mm. wide; Stamens, many (30?); Ovary superior; Styles #1, 10 mm.; Fruit unknown (Described from Coll. No. 1093, 30 Apr 2015, and Coll. No. 1819, 16 May 2018).
- Coors Tech Wetland Open Space, 5993. 5/11/2026. .
- Cressmans Gulch, 4560. 4/15/2026. .
- Deadman Gulch, Climbed upon by Humulus lupulus, also here: Epilobium hirsutum, and E. ciliatum, Urtica dioica, and Crataegus succulenta. Around edges of small wetland in Deadman Gulch, 3.80 km. south of the GNIS location of Golden. Tom Schweich 2443. 4 Sep 2020. ( KHD00072469‡ ) .
- Grampsas North Open Space (City of Golden), 4300. 7/25/2025. .
- Grant Terry Open Space, iNaturalist Observation 345823346. suzanne11 5883. 3/28/2026. .
- Heritage Dells, North Gulch, 4597. 4/23/2026. .
- Heritage Dells, South Gulch, 4490. 4/9/2026. .
- Kinney Run, Few shrubs in deep grasses; Ribes aureum and R. cereum also collected here. Small alluvial terrance between the streambeds of Kinney Run and Deadman Gulch, 2.8 km. south of the GNIS location of Golden Tom Schweich 1819. 16 May 2018. ( COLO02348167‡ KHD00069208‡ ) .
- Magic Mountain Archeological Site, 4329. 7/30/2025. .
- North Hogback Open Space (City of Golden), South end of clay mines, behind the fence, with Pinus ponderosa. (I reached through the fence to make the collection; did not climb over it.) South end of hogback in northernmost Golden, 4.0 km. north northwest of the GNIS location of Golden. Tom Schweich 2760. 26 Apr 2022. ( UCR ) .
- North Table Mountain Open Space (City of Golden), 4202. 6/23/2025. in thickets West slopes of North Table Mountain, along the City of Golden's North Table Mountain Trail, about 1.0 km south from North Table Loop, and 2.0 km north of the GNIS location of Golden. Tom Schweich 1093. 30 Apr 2015. ( CAS UC2045766‡ UCR266075‡ ) .
- Parfet Prehistoric Preserve, 4016. 4/30/2025. 4051. 5/12/2025. .
- South Table Mountain Open Space (City of Golden), 6002. 5/13/2026. .
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2334. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 Tom Schweich, with Ann Norton 2256. 6/12/2021. .
- Tripp Ranch Meadow Open Space, 2741. 6/10/2022. .
- Welch Ditch (Open Space),
4708.
4/25/2026.
4745.
4/25/2026.
.
.
Prunus pensylvanica L. f. (Syn: Cerasus pensylvanica (L. f.) Loiseleur ) Pin Cherry. CalPhotos. Jepson eFlora. SEINet Taxon.
Small tree, 1.5-3.0 m., partially leafed out while in bloom; Branches, unarmed, peeling white, dotted; Leaves, petiole, 7-12 mm., very sparsely short hairy, some have a pair of glands at base of leaf, blade, ovate to elliptic, 25 mm. × 20-23 mm. wide, pinnately veined, margin, toothed, small glands on distal edge of each tooth, veins of young leaves sometimes hairy abaxially; Inflorescence, flowers in clusters of 5-8 on pedicels to 14 mm.; Hypanthium, 3.5 mm × 3 mm. wide, glabrous inside; Sepals, 1.5 mm., glabrous, few (2) glands on margins; Petals, 5-7 mm., white; Stamens, #12-25; Ovary, superior, glabrous; Style, #1, 4 mm., emerges from top of ovary; Fruit, unknown (Described from Coll. No. 1354, 20 May 2016 and Coll. No. 1619, 15 May 2017).
- Schweich Hill,
Near fence, north edge of parcel.
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden.
Tom Schweich 1619.
15 May 2017.
(
CDA0050098‡
KHD00065395‡
)
.
.
 Glandular teeth on leaf margin of Coll. No. 1354, Prunus pensylvanica |
 Coll. No. 1354, Prunus pensylvanica |
Prunus virginiana L. Chokecherry. CalPhotos. Jepson eFlora. SEINet Taxon.
The most useful distinction is between chokecherries found east of the Rocky Mountains, var. virginiana and those found from the mountains westward, var. demissa. Plants of the High Plains show intergradation between those of the Rockies and those of the East.
- Cressmans Gulch, 4557. 4/15/2026. 4580. 4/15/2026. .
- Deadman Gulch, Slightly above the watercourse locally named “Kinney Run,” between US Highway 6 and Eagle Ridge Drive, 3.2 km. south of the GNIS location of Golden Tom Schweich 2040. 2 Jun 2019. ( EIU KHD00071101‡ OBI183241‡ REGIS ) .
- Grampsas North Open Space (City of Golden), 3907. 12/7/2024. .
- Kinney Run South, 3968. 1/3/2025. 4462. 4/9/2026. .
- Heritage Dells, North Gulch, 4596. 4/23/2026. .
- Heritage Dells, South Gulch, 6155. 6/1/2026. .
- Magic Mountain Archeological Site, 4328. 7/30/2025. .
- North Hogback Open Space (City of Golden), Tom Schweich 1737. 6/14/2019. Tom Schweich 1942. 6/12/2020. .
- North Table Mountain Open Space (City of Golden), 4201. 6/23/2025. .
- Parfet Prehistoric Preserve, 3996. 4/30/2025. .
- Schweich Hill, Determination tentative Tom Schweich 1504. 3/27/2017. Determination tentative Tom Schweich 1505. 3/27/2017. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1611. 15 May 2017. ( COLO02347896‡ KHD00065393‡ ) .
- South Table Mountain Open Space (City of Golden), 6052. 5/13/2026. .
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2335. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 Tom Schweich, with Ann Norton 2257. 6/12/2021. .
- Tripp Ranch Meadow Open Space, 2740. 6/10/2022. .
- Tucker Gulch (lower), Common native shrub or small tree thriving in urban habitat. North bank of Tucker Gulch, the stream draining Golden Gate Canyon, above the stream, 130 m. along gulch generally west of North Ford Street, 2.61 km. north northwest of the GNIS location of Golden. Tom Schweich 2845. 6 Jul 2022. .
- Welch Ditch (Open Space),
4680.
4/25/2026.
4690.
4/25/2026.
4724.
4/25/2026.
4743.
4/25/2026.
.
.
Rosa . Horticultural Rose. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space, horticultural rose 5990. 5/11/2026. . .
Rosa L. Rose. CalPhotos. Jepson eFlora. SEINet Taxon.
- Cressmans Gulch, prickles on new growth, nine leaflets. 4572. 4/15/2026. . .
Rosa . Horticultural Rose. CalPhotos. Jepson eFlora. SEINet Taxon.
- Heritage Dells, South Gulch, horticultural rose, not R. glauca. 6156. 6/1/2026. .
- Magic Mountain Archeological Site, horticultural rose 4327. 7/30/2025. .
- Welch Ditch (Open Space), horticultural rose 4721. 4/25/2026. . .
Rosa acicularis Lindl. ssp. sayi (Schwein.) W. H. Lewis. (Syn: Rosa acicularis Lindl. , Rosa sayi Schweinitz ) Say's Acicular Rose. CalPhotos. Jepson eFlora. SEINet Taxon.
Prickles on new growth, leaflets 5-7(9), flowers 1-3
- Parfet Open Space (City of Golden),
Fine prickles densely on new growth, 7(8) leaflets per leaf.
4248.
7/16/2025.
.
.
 Rosa acicularis ssp. sayi on North Table Mountain. |
 Coll. No. 3027, Rosa acicularis ssp. sayi. |
 Coll. No. 3398, Rosa acicularis ssp. sayi. |
 Coll. No. 2545, Rosa acicularis var. sayi |
Rosa arkansana Porter. Prairie Rose. CalPhotos. Jepson eFlora. SEINet Taxon.
Low-growing perennial, to 20 cm.; Stem, straight slender unequal prickles, present on new growth; Leaves, alternate, compound, leaflets (7)9-11, 20 mm. × 9 mm. wide, serrate, teeth dark-tipped, unclear whether there is glandular exudate, sparsely villous on both sides; Flowers, in clusters of 2-5; Sepals, 16 mm. × 3 mm. wide, abaxial, stalked glandular, adaxial, glandular hairy; Petals, 28 mm. × 21 mm. wide, color pink (Described from Coll. No. 1456, 27 June 2016).
- Kinney Run South, 4482. 4/9/2026. .
- Parfet Open Space (City of Golden), 4117. 6/1/2025. .
- Heritage Dells, North Gulch, 4650. 4/23/2026. .
- Heritage Dells, South Gulch, prickles on new growth, 11 leaflets. 6117. 6/1/2026. .
- Magic Mountain Archeological Site, 4323. 7/30/2025. .
- North Hogback Open Space (City of Golden), 4275. 7/20/2025. .
- North Table Mountain Open Space (City of Golden), 4212. 6/23/2025. .
- Parfet Prehistoric Preserve, 4025. 4/30/2025. .
- Schweich Hill, South side, near top of hill, scattered among grasses. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1670. 16 Jun 2017. ( KHD00065399‡ UC ) .
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2336. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 .
- Tripp Ranch Meadow Open Space,
Tom Schweich 3584.
6/8/2024.
.
.
 Coll. No. 3410, Rosa arkansana. |
 Coll. No. 3410, Rosa arkansana. |
 Coll. No. 1456, Rosa arkansana |
 Coll. No. 1670, Rosa arkansana |
 New growth of Coll. No. 1670, Rosa arkansana |
Rosa woodsii Lindl. Mountain Rose. CalPhotos. Jepson eFlora. SEINet Taxon.
Prickles absent on new growth, leaflets 5-9, flowers 1-10(25).
- Eagle Ridge, On mesa slope. Transferred from USGS Herbarium, Denver, CO (2005). Foothills of the Front Range, at junction of US 6 and road to Morrison, about 1 mile east of Golden. Hansford T. Shacklette 5881. 27 Jun 1959. ( COLO529988‡ ) .
- South Table Mountain Open Space (City of Golden),
0 prickles new growth, 9 lflts.
6022.
5/13/2026.
.
.
 Coll. No. 3057, Rosa woodsii |
 Coll. No. 691, Rosa woodsii var. ultramontana |
Rubus deliciosus Torr. (Syn: Oreobatus deliciosus Torr.(E. James ex Torr.) Rydb. ) Delicious raspberry. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial shrub, to 1.5 m.; Stem, bark, shreddy; Leaves, simple, 17 mm. × 23 mm. wide, palmate veined, lobed, serrate, few straight hairs, petiole, 11 mm.; Flowers, white, solitary, 17-19 mm.; Fruit, unknown (Described from Coll. No. 1091, 30 Apr 2015).
- Kinney Run South, 3984. 1/3/2025. .
- Grant Terry Open Space, iNaturalist Observation 349789808. craftycass 5885. 4/13/2026. iNaturalist Observation 278215786. darrin30 5884. 5/3/2025. .
- Heritage Dells, North Gulch, 4648. 4/23/2026. .
- Heritage Dells, South Gulch, 4510. 4/9/2026. 6148. 6/1/2026. 6154. 6/1/2026. .
- Kinney Run, Tom Schweich 1842. 5/15/2020. .
- North Hogback Open Space (City of Golden), 4274. 7/20/2025. .
- North Table Mountain Open Space (City of Golden), Rocky outcrops on the toe of a landslide. West slopes of North Table Mountain, along the City of Golden's North Table Mountain Trail, about 0.7 km south from North Table Loop, and 2.3 km north of the GNIS location of Golden. Tom Schweich 1091. 30 Apr 2015. ( CAS OBI82198‡ UC2045767‡ UCR266074‡ ) .
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2337. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 .
- Tripp Ranch Meadow Open Space,
Tom Schweich 3586.
6/8/2024.
.
.
Coll. No. 1091, Rubus deliciosus |
 Coll. No. 1091, Rubus deliciosus |
 Coll. No. 1091, Rubus deliciosus |
Sorbus aucuparia L. European Mountain Ash. CalPhotos. Jepson eFlora. SEINet Taxon.
- Welch Ditch,
Also collected nearby: Holodiscus dumosus, and Prunus americana.
On the easternmost edge of Clear Creek Canyon Park, north bank of the Welch Ditch, 1.72 km. west southwest of the GNIS location of Golden.
Tom Schweich 2511.
7 Jun 2021.
(
COLO2706208‡
JCOS
KHD75595‡
OBI183661‡
)
.
 Sorbus aucuparia planted on Illinois Street. |
 Coll. No. 2511, Sorbus aucuparia |
Rubiaceae
Galium aparine L. (Syn: Galium aparine L. var. echinospermum (Wallr.) Farw. , Galium spurium L. ) Sticky Willy, Cleavers. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual/perennial unknown, weak-stemmed and scrambling through shrubs and grass; Stem, retrorsely scabrous on angles (but not densely so); Leaves, whorls of 6-8 (more leaves above, fewer below), 46 mm. × 4 mm. wide, oblanceolate, margins retrorsely scabrous, tips with a short spine; Flowers, corolla, greenish-white, lobes 1 mm.; Fruit, 1.3 mm., covered with hooked hairs (Described from Coll. No. 1395, 8 June 2016).
- Cressmans Gulch, 4543. 4/15/2026. .
- Parfet Open Space (City of Golden), 4170. 6/1/2025. .
- North Table Mountain Open Space (City of Golden), Shade of large shrubs in ravine. Southwest side of North Table Mountain, along City of Golden North Table Mountain Trail, 2.5 km. north of the GNIS location of Golden. Tom Schweich 1395. 8 Jun 2016. ( JCOS s.n. KHD00063847‡ UC UCR277985‡ ) .
- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2258. 6/12/2021. .
- Welch Ditch (Open Space),
4733.
4/25/2026.
.
.
 Coll. No. 1395 Galium aparine |
Galium boreale L. (Syn: Galium septentrionale Roem. & Schult. ) Bedstraw. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial, to 40 cm.; Stems, ascending; Leaves, in whorls of 4, tips rounded, 3-nerved; Flowers, cream-colored; Fruit, short-hairy (Described from Coll. No. 2374, 23 June 2020).
- North Table Mountain Open Space (City of Golden),
Seen or collected nearby: Ericameria nauseosa var. graveolens, Campanula rotundifolia, Prunus americana, P. virginiana, Acer glabrum, and Bromus inermis.
Designated as a City of Golden Open Space in 2025.
Along a social trail in the northern part of the North Table Mountain Open Space, beside one of the larger watercourses coming down from the top of the mesa, 2.42 km. north of the GNIS location of Golden.
Tom Schweich 3429.1
23 Jun 2025.
.
 Habitat of Coll. No. 3266, Galium boreale in Coal Creek Canyon. |
 Coll. No 1721.1, Galium boreale |
 Mature Inflorescence of Coll. No 1721.1, Galium boreale |
Salicaceae
Populus angustifolia E. James. Narrowleaf Cottonwood. CalPhotos. Jepson eFlora. SEINet Taxon.
Collected and described by Edwin James of the Long Expedition, 1820.
- Grant Terry Open Space,
iNaturalist Observation 162303890.
chelseasg 5949.
5/18/2023.
.
.
 Coll. No. 2812, Populus angustifolia. |
 Bud scales of Coll. No. 2812, Populus angustifolia. |
Populus deltoides Marshall ssp. monilifera (Aiton) Eckenw. (Syn: Populus sargentii Dode ) Plains Cottonwood. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space, 5966. 5/11/2026. .
- Cressmans Gulch, pistillate 4559. 4/15/2026. .
- Deadman Gulch, Also collected here: Apocynum ×floribundum, Mirabilis nyctaginea, Rhamnus cathartica, and Schoenoplectus tabermontani. East side of Highway 6, along the Illinois Street Trail, 2.21 km. south of the GNIS location of Golden. Tom Schweich, with Cynthia Hastings 3245. 31 May 2024. ( JCOS s.n. REGIS s.n. Error 14.6(b)-7c ) .
- Cottonwood Natural Area, 3958. 12/27/2024. .
- Heritage Dells, North Gulch, 4602. 4/23/2026. .
- Magic Mountain Archeological Site, 4332. 7/30/2025. .
- North Hogback Open Space (City of Golden), Tom Schweich 1747. 6/14/2019. Tom Schweich 3551. 11 Apr 2026. ( Undist. ) .
- North Table Mountain Open Space (City of Golden), Entrance to Jefferson County Open Space, parcel owned by City of Golden. South slopes of North Table Mountain, along the road to the Golden Cliffs overflow parking, 1.20 km north northeast of the GNIS location of Golden Tom Schweich 1338. 11 May 2016. ( KHD00064102‡ UC UCR278789‡ ) .
- Stonebridge Homeowners Association, var. monilifera assumed Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2338. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 .
- Tucker Gulch (lower), northeast (left) bank of creek Tom Schweich 2901. 7/6/2022. .
- Welch Ditch (Open Space),
4741.
4/25/2026.
.
.
Salix . Willow. CalPhotos. Jepson eFlora. SEINet Taxon.
- Tucker Gulch (lower),
Eight to ten plants on both sides of creek with roots in water.
Material combined with Coll. No. 1103.
On the lower banks adjacent to creek, lower Tucker Gulch, about 260 meters north northwest of the First Street bridge.
Tom Schweich 1073.
16 Mar 2015.
(
Golden
)
Clump of five to six plants, ±1 meter above creek.
Along the creek in lower Tucker Gulch, about 100 meters north northwest of the First Street bridge.
Tom Schweich 1074.
16 Mar 2015.
(
Discarded.
)
Salix, match with Coll. No. 1074.
Tom Schweich 1104.
11 May 2015.
(
Discarded.
)
.
.
Salix alba L. White Willow. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial upright shrub to 4 m., growing into multiple-trunked tree to 10 m.; Twigs, yellow-brown, glabrous (not pruinose), current-year growth not available; Bud, scale margins connate; Leaves, alternate, 39 mm. × 9.5 mm. wide, = 4.1×long vs. wide, mid-vein slightly long hairy, margins hairy, otherwise leaves glabrous, youngest leaves with margins glandular-toothed, petiole, 3 mm., eglandular, deeply grooved adaxially; Plants, staminate, no pistillate material found. Catkins, 50 mm., not branched, arising from subterminal buds; Stamens 2, Filaments, 3 mm., not connate; Anthers, 0.7 mm.; Capsules, unknown. Described from Coll. No. 1103, 11 May 2015.
- Tucker Gulch (lower),
Eight to ten plants on both sides of creek with roots in water, plus 2 multi-trunk trees approximately 100 meters upstream.
Contains materials matched from Coll. No. 1073, 16 Mar 2016.
On the lower banks adjacent to creek, lower Tucker Gulch, about 260 meters north northwest of the First Street bridge.
Tom Schweich 1103.
11 May 2015.
(
CS
KHD00060556‡
UCR277967‡
)
.
.
 Coll. No. 1073, Salix alba |
 Coll. No. 1073, Salix alba |
 Salix alba along Tucker Gulch. |
 Salix alba trunks along Tucker Gulch. |
Salix amygdaloides Andersson. Peachleaf Willow. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial tree, Twigs, young, dark brown; Leaves, alternate, petiole, 10-12 mm., tuft of hairs adaxially, glands absent at base of leaf, blade, 80 mm. × 26 mm. wide, 3.08 × long as wide, young leaves have slightly tangled white hairs both sides, mature leaves, green adaxially, glaucus abaxially, margin, serrate, tip, acuminate; Staminate catkins (aments), peduncle, 12 mm., spike, 47 mm. × 9 mm. wide, stamens, #4-5, 4.5 mm.; Pistillate catkins, absent. (Described from Coll. No. 1886, 28 May 2018.)
- Coors Tech Wetland Open Space, 5971. 5/11/2026. .
- Magic Mountain Archeological Site, 4331. 7/30/2025. .
- Stonebridge Homeowners Association,
Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2339.
7/24/2020.
Sovell, John R., and Susan S. Panjabi, 2021
.
.
 Salix amygdaloides (Coll. No. 1886) with Cottonwood in southern Survey Fields. |
 Coll. No. 1886, Salix amygdaloides |
Salix exigua Nutt. Coyote Willow, Narrow-Leaved Willow. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial erect shrub, to 2 m.; Leaves, alternate, 21 mm. ×. 1.8 mm. wide, 11.7 ×long as wide, abaxial villous, adaxial mostly glabrous, margins entire, slightly revolute; Staminate catkins, 30 mm. × 6 mm. wide; Pistillate catkins, 42 mm. × 4 mm. wide, floral bract, 1.8 mm., capsule, 2.6 mm., glabrous (Described from Coll. No. 1880, 24 May 2018).
- Coors Tech Wetland Open Space, 5960. 5/11/2026. .
- Cressmans Gulch, 4558. 4/15/2026. .
- Cottonwood Natural Area, 3949. 12/27/2024. .
- Grant Terry Open Space, iNaturalist Observation 21011704. selasphorus 5950. 3/6/2019. .
- Magic Mountain Archeological Site, 4330. 7/30/2025. .
- North Hogback Open Space (City of Golden), 4267. 7/20/2025. .
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2340. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 Tom Schweich, with Ann Norton 2259. 6/12/2021. .
- Tucker Gulch (lower),
northeast (left) bank of creek
Tom Schweich 2900.
7/6/2022.
.
.
 Pistillate catkin of Coll. No. 1880, Salix exigua |
 Staminate catkin of Coll. No. 1880, Salix exigua |
Salix irrorata Andersson. Dewystem Willow. CalPhotos. Jepson eFlora. SEINet Taxon.
- Cressmans Gulch, Tom Schweich 3559. 15 Apr 2026. ( Undist. ) .
- Heritage Dells & Tripp Ranch Meadow Open Spaces, Damp soil, with Cirsium arvense, Turritis glabra, Melilotus officinalis, Carex bebbii, C. occidentalis, and Juncus interior. In the southernmost gulch of Heritage Dells, middle section between DeFrance Way and Crawford Street, 135 m. downstream of DeFrance Way, 4.2 km. south of the GNIS location of Golden. Tom Schweich 3550. 9 Apr 2026. ( COLO KHD REGIS UCR ) .
- Kinney Run, rooted in perennial water. at bridge Tom Schweich 3549. 30 Mar 2026. .
- North Hogback Open Space (City of Golden),
Determination tentative, stems not particulatly dewey.
4527.
4/11/2026.
This parcel designated the North Golden Hogback Open Space in July 2025.
On the lowest stream terrace of a dry wash (Cressman Gulch) that runs along the southwest side of the open space, 3.35 km. northwest of the GNIS location of Golden.
Tom Schweich 3456.
20 Jul 2025.
(
CS
KHD
OBI
)
.
 Coll. No. 3549, Salix irrorata. |
 Coll. No. 2490, Salix irrorata. |
 Coll. No. 3456, Salix irrorata. |
 Coll. No. 3550, Salix irrorata |
Santalaceae
Comandra umbellata (L.) Nutt. ssp. pallida (A. DC.) Piehl. (Syn: Comandra umbellata (L.) Nutt. var. pallida (A. DC.) M. E. Jones ) Pale Bastard Toadflax. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Open Space (City of Golden), 4122. 6/1/2025. .
- Heritage Dells, North Gulch, 4623. 4/23/2026. 4641. 4/23/2026. .
- Heritage Dells, South Gulch, 4494. 4/9/2026. .
- Kinney Run, 4448. 3/30/2026. .
- Magic Mountain Archeological Site, 4341. 7/30/2025. Tom Schweich 1654. 4/18/2018. .
- North Hogback Open Space (City of Golden), Tom Schweich 1727. 6/14/2019. .
- Schweich Hill, Tom Schweich 1522. 3/27/2017. Uncommon, but widespread where not crowded out by invasive exotics. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1620. 15 May 2017. ( CDA0050097‡ KHD00065343‡ ) .
- South Table Mountain Open Space (City of Golden), 6031. 5/13/2026. .
- Tripp Ranch Meadow Open Space, 2761. 6/10/2022. .
- Welch Ditch, Also collected here: Sedum lanceolatum, Aletes acaulis, Eriogonum umbellatum var. umbellatum, and Physocarpus monogynus. Popular rock-climbing area with heavy daily use. Along the former Welch Ditch, south side of Clear Creek, growing in rocks on slope above the ditch, just inside the mouth of Clear Creek Canyon, 2.58 km. west southwest of the GNIS location of Golden. Tom Schweich 2312.5 3 Jun 2020. ( COLO REGIS ) .
- Welch Ditch (Open Space),
4703.
4/25/2026.
4707.
4/25/2026.
.
Sapindaceae
Acer glabrum Torr. var. glabrum. (Syn: A. glabrum Torr. var. torreyi (Greene) Smiley ) Rocky Mountain Maple. CalPhotos. Jepson eFlora. SEINet Taxon.
- Heritage Dells, South Gulch, 4508. 4/9/2026. Tom Schweich 3591. 1 Jun 2026. ( Undist. ) .
- North Table Mountain Open Space (City of Golden), Seen or collected nearby: Ericameria nauseosa var. graveolens, Campanula rotundifolia, Prunus americana, P. virginiana, Galium boreale, and Bromus inermis. One of several quintessential Jefferson County taxa, as the type was collected in Platte Canyon by Dr. Edwin James of the Major Stephen H. Long expedition of 1820. Along a social trail in the northern part of the North Table Mountain Open Space, beside one of the larger watercourses coming down from the top of the mesa, 2.42 km. north of the GNIS location of Golden. Tom Schweich 3429. 23 Jun 2025. ( KHD ) .
- Welch Ditch,
Also collected here and nearby: Jamesia americana, Physocarpus monogynus, and Koeleria macrantha.
Popular rock-climbing area with heavy daily use.
Along the former Welch Ditch, south side of Clear Creek, growing in rocks on slope just below the ditch, just inside the mouth of Clear Creek Canyon, 2.55 km. west southwest of the GNIS location of Golden.
Tom Schweich 2313.
3 Jun 2020.
(
JCOS s.n.
KHD00072986‡
REGIS
UC
)
.
.
Acer negundo L. (Syn: Acer negundo L. var. interius (Britton) Sarg. , Negundo aceroides (L.) Moench ) Box Elder. CalPhotos. Jepson eFlora. SEINet Taxon.
Tree, ±5 m.; Branches, young, soft short hairy (var. interius); Leaves, opposite, ternately compound, leaflets 3; Pistil 1; Stigma, branches 2; Fruit, 2 winged 1-seeded samaras. (Described from Coll. No. 1102, 11 May 2015).
- Cressmans Gulch, 4540. 4/15/2026. .
- Kinney Run South, 4466. 4/9/2026. .
- Parfet Open Space (City of Golden), 4142. 6/1/2025. .
- Grant Terry Open Space, iNaturalist Observation 91774123. jbp2 5919. 8/19/2021. .
- Heritage Dells, North Gulch, 4606. 4/23/2026. .
- Kinney Run, Also seen or collected nearby: Rhus trilobata, Elaeaegnus angustifolia, Dipsacus laciniatus, and Typha latifolia. West side of Kinney Run nearing the houses of Stonebridge HOA, between Deadman Gulch and Tripp Ranch, 2.42 km. south of the GNIS location of Golden. Tom Schweich 2411. 31 Jul 2020. ( COLO2434124‡ KHD00072990‡ OBI186042‡ UCR ) .
- Magic Mountain Archeological Site, 4352. 7/30/2025. .
- Parfet Prehistoric Preserve, 4029. 4/30/2025. 4047. 5/12/2025. .
- South Table Mountain Open Space (City of Golden), 6011. 5/13/2026. .
- Stonebridge Homeowners Association, Tom Schweich 3267. 6/13/2023. .
- Tucker Gulch (lower), Probably var. interius (Britton) Sarg. Along Tucker Gulch, near its junction with Cressmans Gulch, about 220 m below Ford Street, and 400 m above First Street. Tom Schweich 1102. 11 May 2015. ( KHD00060214‡ ) northeast (left) bank of creek Tom Schweich 2899. 7/6/2022. .
- Welch Ditch (Open Space),
4686.
4/25/2026.
4715.
4/25/2026.
4742.
4/25/2026.
.
 Coll. No. 2457, Acer negundo. |
 Emerging staminate flowers of Acer negundo. |
 Britton & Shafer (1908) Figure 608, Acer interior. |
 Coll. No. 1102, 11 May 2015 |
 Coll. No. 2451, Acer negundo |
Scrophulariaceae
Scrophularia lanceolata Pursh. Lanceleaf Figwort. CalPhotos. Jepson eFlora. SEINet Taxon.
- Kinney Run, On the bank of Kinney Run, above its junction with Deadman Gulch, and near the Cambria Lime Kiln (historic site), 2.95 km. south southeast of the GNIS location of Golden. Tom Schweich 1964. 6 Jul 2018. ( COLO02348605‡ KHD00069223‡ OBI ) small colony in Rhus trilobata thicket Tom Schweich 1989. 7/31/2020. .
- Stonebridge Homeowners Association, Tom Schweich 3266. 6/13/2023. .
- Tripp Ranch Meadow Open Space, Tom Schweich 3587. 6/8/2024. .
- Welch Ditch,
Also colleted here: Cynoglossum officinale, Bromus tectorum, and Dactylis glomerata.
Popular rock-climbing area with heavy daily use.
Along the former Welch Ditch, in shade inside the ditch, south side of Clear Creek, just inside the mouth of Clear Creek Canyon, 2.73 km. west southwest of the GNIS location of Golden.
Tom Schweich 2308.
3 Jun 2020.
(
CAS
JCOS s.n.
UC
UCR
)
.
.
 Scrophularia lanceolata at Devils Churn Trail. |
Verbascum phlomoides L. Orange Mullien. CalPhotos. Jepson eFlora. SEINet Taxon.
- Deadman Gulch, Determination tentative, very different from V. thapsus or V. blattaria. Tom Schweich, with Susan Panjabi and Zachariah Wilson 1991. 8/11/2020. . .
Verbascum thapsus L. Common Mullein. Weed: CO DofA, List: C. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space, 5996. 5/11/2026. 5999. 5/11/2026. .
- Cottonwood Natural Area, 3954. 12/27/2024. .
- Grampsas North Open Space (City of Golden), 3902. 12/7/2024. .
- Kinney Run South, 3963. 1/3/2025. .
- Grant Terry Open Space, iNaturalist Observation 122341854. max711 5932. 6/18/2022. iNaturalist Observation 21002495. selasphorus 5930. 3/6/2019. iNaturalist Observation 30760202. sgeol 5931. 8/13/2019. .
- Heritage Dells, North Gulch, 4624. 4/23/2026. 4626. 4/23/2026. .
- Magic Mountain Archeological Site, 4322. 7/30/2025. Tom Schweich 1661. 4/18/2018. Also collected here: Berteroa incana, Vicia villosa, and Potentilla recta. This area was extensively collected by E. H. Brunquist in 1959-1960 during the Peabody Museum excavation at Magic Mountain. V. thapsus was collected at that time. Colorado Noxious Weed List C. Terrace on the north bank of Apex Gulch, between Fire Station 4 and the Kinney Run Trail bridge, 5.73 km. south of the GNIS location of Golden. Tom Schweich 2132. 8 Jul 2019. ( JCOS s.n. KHD00074286‡ OBI186008‡ UCR ) .
- North Hogback Open Space (City of Golden), Tom Schweich 1693. 6/14/2019. .
- Schweich Hill, Tom Schweich 1507. 3/27/2017. .
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2341. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 Tom Schweich, with Ann Norton 2260. 6/12/2021. .
- Tripp Ranch Meadow Open Space,
Tom Schweich 3580.
6/8/2024.
.
 Package of Mullein in the Pharmacy at Fort Hartsuff. |
 Dense colonies of Common Mullein (Verbascum thapsus) in Cottonwood Canyon |
 Collection No. 512, Verbascum thapsus |
Simaroubaceae
Ailanthus altissima (Mill.) Swingle. Tree of Heaven. Weed: CO DofA, List: C. CalPhotos. Jepson eFlora. SEINet Taxon.
- Grampsas North Open Space (City of Golden), 4309. 7/25/2025. .
- Tucker Gulch (lower), iNaturalist Observation 187025492. Tom Schweich 3466. 10/9/2023. .
- Welch Ditch (Open Space),
4730.
4/25/2026.
.
 Mature Tree of Heaven on Garden Glen Court. |
 Samara (fruit) of Ailanthus altissima “Tree of Heaven.” |
 Tree of Heaven saplings infesting a front lawn. |
 Mature Tree of Heaven on Maple Street. |
Solanaceae
Lycium barbarum L. Matrimony Vine. CalPhotos. Jepson eFlora. SEINet Taxon.
- Kinney Run,
With Cirsium canadensis, Ericameria nauseosa var. graveolens, and Bromus inermis.
iNaturalist Observation 239862182.
About 8 m. west of the Kinney Run Trail, close to its origin at the end of Tripp Drive, and adjacent to a small watercourse tributary to Kinney Run, 3.57 km. south of the GNIS location of Golden.
Tom Schweich 3368.
4 Sep 2024.
(
JCOS
)
.
.
 Coll. No. 3368, Lycium barbarum. |
Lycium chinense Mill. Chinese Desert-Thorn. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial, herbaceous, sprawling; Stem, thorn, #1, 6 mm.; Leaves, alternate, petioles 5 mm., blade 44 mm. × 12 mm. wide, lanceolate to obovate, entire; Sepals, tube 4 mm. + lobes 1 mm., triangular; Corolla, united at base, tube 4 mm. + lobes #5, 5-6 mm. × 3.2 mm., radially symmetrical; Stamens, #5; Ovary, unknown; Stigma, entire. Corolla tube < lobes and ±hidden by calyx = L. chinense Mill. per Jepson Manual of California. Described from Coll. No. 2846, 6 Jul 2022.
- Tucker Gulch (lower),
Weedy slope with Bromus inermis, Euphorbia esula, Ulmus pumila, etm.
North boundary of City of Golden parcel, sprawling down slope with yard waste from adjacent privately-owned parcel, about 140 m. west northwest of North Ford Street. 2.64 km. northwest of the GNIS location of Golden.
Tom Schweich 2846.
6 Jul 2022.
(
KHD00079831‡
)
.
.
 Coll. No. 2486, Lycium chinense |
 Flower of Coll. No. 2486, Lycium chinense |
 Flower of Coll. No. 2486, Lycium chinense |
 Scan of Coll. No. 2486, Lycium chinense |
Physalis hederifolia A. Gray. (Syn: Physalis hederifolia A. Gray var. comata (Rydb.) Waterfall ) Ivy-Leaved Ground Cherry. CalPhotos. Jepson eFlora. SEINet Taxon.
- Deadman Gulch, More than 20 plants here, but otherwise very local. Small fragment, inadequate as a collections. Tom Schweich 2436. 23 Aug 2020. ( Golden ) .
- Grampsas North Open Space (City of Golden),
4301.
7/25/2025.
4310.
7/25/2025.
With Ambrosia psilostachya, many Ericameria nauseosa var. graveolens, Chenopodium album, and Bromus japonicus.
This area was designated a City of Golden open space in 2025.
Approximate center of the open space, northern portion of the Tony Grampsas Memorial Sports Complex, 4.11 km. (geodesic) northeast of the GNIS location of Golden.
Tom Schweich 3475.
25 Jul 2025.
(
CAS
)
.
.
 Ivy-Leaved Ground Cherry (Physalis hederifolia) on limestone outcrop, east side of Mesquite Mountains. |
 Coll. No. 3475, Physalis hederifolia. |
 Coll. No. 1511, Physalis hederifolia var. comata |
Physalis longifolia Nutt. Longleaf Groundcherry. CalPhotos. Jepson eFlora. SEINet Taxon.
“Most specimens originally identified as P. virginiana actually belong to P. longifolia” (Ackerfield, 2015). “[P. virginiana] has many races that are often treated as varieties or even separate species, including P. longifolia Nuttall” (Weber & Wittmann, 2012).
- Grampsas North Open Space (City of Golden), Also here or nearby: Cirsium arvense, Onopordum acanthium, Symphyotrichum ericoides, Nepeta cataria, Elaeagnus angustifolia, Ailanthus altissima, and Bromus inermis. This area was designated a City of Golden open space in 2025. Northern portion of the Tony Grampsas Memorial Sports Complex, against the north fence, 4.23 km. northeast of the GNIS location of Golden. Tom Schweich 3474. 25 Jul 2025. ( CAS ) .
- North Hogback Open Space (City of Golden),
Top of a waste pile. Also collected here: Chenopodium album and Dipsacus laciniatus.
Northwestern-most Golden, in the pit of a former clay mine, accessed by way of the City of Golden Cressman Gulch Trail and then a social/game trail, 4.28 km. north northeast of the GNIS location of Golden.
Tom Schweich 2396.
29 Jul 2020.
(
KHD00073467‡
OBI149101‡
UCR297628‡
)
.
.
 Coll. No. 3474, Physalis longifolia. |
Solanum dulcamara L. Climbing Nightshade. CalPhotos. Jepson eFlora. SEINet Taxon.
- Deadman Gulch, Foothills grassland north side of creek; foothills shrubland south side of creek; Also collected here: Epilobium ciliatum, E. hirsutum, Cirsium arvense, Dactylis glomerata, and Thinopyrum intermedium. Near the junction of Deadman Gulch and Kinney Run, growing in the creek bed, 2.28 km. south of the GNIS location of Golden. Tom Schweich 2409.1 31 Jul 2020. ( CDA0053772‡ UCR ) .
- Cottonwood Open Space (City of Golden), Several patches on the overgrown bank of ditch. Cottonwood Open Space, formerly named Cottonwood Natural Area, was designated by the City of Golden in July 2025. Right bank of the Welch Ditch in the western corner of Cottonwood Open Space, 1.63 km. south of the GNIS location of Golden. Tom Schweich 3446. 7 Jul 2025. ( FLD KHD OBI REGIS ) .
- Kinney Run,
Growing in culvert at Illinois Avenue
Streambed of Deadman Gulch at Illinois Avenue, between US Highway 6 and the Fossil Trace Golf Club, 2.03 km. south southeast of the GNIS location of Golden.
Tom Schweich 1961.
6 Jul 2018.
(
COLO02348621‡
JCOS s.n.
KHD00069215‡
OBI
UC
)
.
.
 Coll. No. 1961, Solanum dulcamara |
 Coll. No. 1961, Solanum dulcamara |
 Coll. No. 3446, Solanum dulcamara. |
Solanum rostratum Dunal. Buffalo Bur Nightshade. CalPhotos. Jepson eFlora. SEINet Taxon.
- Grant Terry Open Space,
iNaturalist Observation 129986166.
kay_hellmann 5929.
8/7/2022.
.
 Coll. No. 1534, Solanum rostratum |
Ulmaceae
Ulmus pumila L. Siberian Elm. Weed: CO DofA, List: C. CalPhotos. Jepson eFlora. SEINet Taxon.
- Cressmans Gulch, 4552. 4/15/2026. 4574. 4/15/2026. .
- Grampsas North Open Space (City of Golden), 4303. 7/25/2025. .
- Parfet Open Space (City of Golden), 4245. 7/16/2025. .
- Kinney Run, 4437. 3/30/2026. .
- North Hogback Open Space (City of Golden), Tom Schweich 1749. 6/14/2019. .
- Parfet Prehistoric Preserve, 3999. 4/30/2025. .
- South Table Mountain Open Space (City of Golden), 6025. 5/13/2026. .
- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2261. 6/12/2021. .
- Welch Ditch (Open Space),
4691.
4/25/2026.
.
 Figure 1. Composite photo of Siberian elm (Ulmus pumila L.) |
Undet.
Undetermined . CalPhotos. Jepson eFlora. SEINet Taxon.
- Grampsas North Open Space (City of Golden), 4313. 7/25/2025. .
- North Hogback Open Space (City of Golden), Marked with green flag. Tom Schweich 2477. 25 May 2021. ( Fragment ) .
- Welch Ditch,
Bryophyte
Tom Schweich 2029.
4/8/2021.
.
 Accidental Coll. No. 1240.1, Undetermined |
 Coll. No. 1248, Undetermined |
Urticaceae
Parietaria pensylvanica Willd. Pennsylvania Pellitory. CalPhotos. Jepson eFlora. SEINet Taxon.
- South Table Mountain Open Space (City of Golden),
Wet slope above Lubahn Trail under Rhus trilobata, Symphoricarpos sp., and Cercocarpus montanus.
Spring 2023 was recognized as “wetter than average.”
Along the re-routed Lubahn Trail, below the basalt rim of South Table Mountain, 1.15 km. east southeast of the GNIS location of Golden.
Tom Schweich 3046.
7 Jul 2023.
(
KHD ‡
)
wet bank on upperside of Lubahn Trail, large colony under Rhus trilobata and Symphoricarpos occidentalis.
Tom Schweich 3330.
7/7/2023.
.
.
Urtica dioica L. ssp. gracilis (Aiton) Seland. Stinging Nettle. CalPhotos. Jepson eFlora. SEINet Taxon.
- Stonebridge Homeowners Association,
Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2343.
7/24/2020.
Sovell, John R., and Susan S. Panjabi, 2021
.
 Coll. No. 888, Urtica dioica ssp. holosericea, pistillate flowers |
Verbenaceae
Verbena bracteata Lag. & Rodr. Large Bract Vervain. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 15 cm., erect; Leaves, cauline, opposite, petiole 5 mm. + blade 20 mm. × 10 mm. wide, pinnafitid, toothed; Bract, 11 mm. × 2.2 mm. wide, entire; Calyx, 4 mm. × 1.5 mm. wide; Corolla, lobes, #5 tube 4 mm. + throat 1 mm. + lobes 2 mm., limb, 2.5 mm., color blue; Introduced (Described from Coll. No. 1500.2, 13 July 2016). Usually seen as a prostrate trailside herb. However, occasionally growing in grasses and herbs, and forced to adopt an erect habit.
- Grant Terry Open Space, iNaturalist Observation 217322500. geoskimom 5928. 5/20/2024. .
- Kinney Run, Tom Schweich 1633. 7/6/2018. .
- Magic Mountain Archeological Site, 4340. 7/30/2025. .
- Stonebridge Homeowners Association,
Tom Schweich 3301.
6/21/2023.
.
 Coll. No. 1500.2, Verbena bracteata |
Violaceae
Hybanthus verticillatus (Ortega) Baill. Baby Slippers. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Open Space (City of Golden),
Also seen or collected on this ridge: Artemisia campestris, Grindelia subalpina, Townsendia grandiflora, Xanthisma spinulosum, Mentzelia nuda, and Mirabilis linearis.
This parcel was designated a City of Golden Open Space in 2025.
East central portion of the open space, on the southwest end of a small ridge that appears to part of the pre-development topography, 970 m. southwest of the GNIS location of Golden.
Tom Schweich 3397.
1 Jun 2025.
(
CAS
UCR
)
.
.
 Coll. No. 2517, Hybanthus verticillatus. |
 “Nuttall's Violet” on Schweich Hill. |
 “Baby Slippers” Hybanthus verticillatus found in a yard in Golden. |
 Coll. No. 3397, Hybanthus verticillatus. |
Viola nuttallii Pursh. Nuttall's Violet. CalPhotos. Jepson eFlora. SEINet Taxon.
- Kinney Run South, 4467. 4/9/2026. .
- Kinney Run, Thin soil on rock outcrop, at base of Cercocarpus montanus. Tom Schweich 1588. 4/12/2018. 40 m. east of and above the Kinney Run Trail, in the sandstone of a hogback, at the base of Cercocarpus montanus, which itself was rooted in a fracture of the bedrock, 3.22 km. south of the GNIS location of Golden. Tom Schweich 1780. 12 Apr 2018. ( COLO02348126‡ ) .
- North Hogback Open Space (City of Golden), Mixed Foothill Shrubland; also collected here: Ribes cereum, Amelanchier alnifolia, Cercocarpus montanus, Potentilla recta, and Bromus tectorum, Southern end of the hogback in northernmost Golden, 4.15 km. north northwest of the GNIS location of Golden. Tom Schweich 2269. 9 May 2020. ( CAS CDA0053730‡ COLO2433779‡ ) .
- Parfet Prehistoric Preserve, 4049. 5/12/2025. .
- Schweich Hill, in mowed area Tom Schweich 1550. 5/2/2017. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue. On the west slope, near top of hill. Tom Schweich 1593. 2 May 2017. ( CDA0050065‡ CS KHD00065347‡ ) found while weeding the smooth brome, associated with Lomatium orientale, Opuntia macrorhiza, and Crepis occidentalis Tom Schweich, with Cathy Hansen-Stamp 3012. 5/4/2023. .
- Stonebridge Homeowners Association,
Tom Schweich, with Ann Norton 2262.
6/12/2021.
.
Vitaceae
Parthenocissus quinquefolia (L.) Planch. (Syn: Parthenocissus inserta (A.Kern.) Fritsch ) Virginia Creeper. CalPhotos. Jepson eFlora. SEINet Taxon.
- Cressmans Gulch, 4554. 4/15/2026. .
- Grampsas North Open Space (City of Golden), 4299. 7/25/2025. .
- Parfet Open Space (City of Golden),
4135.
6/1/2025.
.
.
 Virginia creeper (Parthenocissus quinquefolia) out-competing bladder senna (Colutea arborescens) in Cressman Gulch. |
Parthenocissus vitacea (Knerr) Hitchcock. Woodbine, thicket creeper. CalPhotos. Jepson eFlora. SEINet Taxon.
- Deadman Gulch, North-facing sllope of Deadman Gulch. Large leaves, but sterile and unidentifiable. Tom Schweich 2435. 23 Aug 2020. ( Golden ) .
- Schweich Hill,
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue. Near neighbors' fences, north central part of parcel.
Tom Schweich 1706.
14 Jul 2017.
(
KHD00065589‡
UCR ‡
)
.
.
 Coll. No. 1706, Parthenocissus vitacea |
Vitis riparia Michx. Riverbank Grape. CalPhotos. Jepson eFlora. SEINet Taxon.
- Magic Mountain Archeological Site,
4333.
7/30/2025.
.
 Coll. No. 2807, Vitis riparia |
 Coll. No. 2807, Vitis riparia |
Zygophyllaceae
Tribulus terrestris L. Puncture Vine. Weed: CO DofA, List: C. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Table Mountain Open Space (City of Golden),
iNaturalist Observation 185157769.
Tom Schweich 3462.
9/26/2023.
.
 Tribulus terrestris growing in a crack between sidewalk and wall. |
 Coll. No. 994, Tribulus terrestris |
Amaryllidaceae
Allium L. Hoticultural Allium. CalPhotos. Jepson eFlora. SEINet Taxon.
- Stonebridge Homeowners Association, Tom Schweich 3268. 6/13/2023. . .
Allium × proliferum (Moench) Schrad. ex Willd. Garden Onion. CalPhotos. Jepson eFlora. SEINet Taxon.
- Heritage Dells, Middle Gulch, 4517. 4/9/2026. .
- Kinney Run,
Very likely a garden escapee, though a brief review of nearby gardens failed to find any cultivated specimens.
In the streambed of Kinney Run, just north of Tripp Ranch, 2.68 km. south of the GNIS location of Golden.
Tom Schweich 2415.
31 Jul 2020.
(
CDA0053775‡
COLO2434116‡
CS
KHD00072969‡
)
.
.
 Horticultural Allium escaped to Kinney Run. |
 Head of Coll. No. 2415, Allium × proliferum |
Allium textile A. Nelson & J.F. Macbr. Textile Onion. CalPhotos. Jepson eFlora. SEINet Taxon.
- Eagle Ridge, On mesa slope in foothills. Notes: Transferred from USGS Herbarium, Denver, CO (2005). United States, Colorado, Jefferson, Foothills of Front Range, at junction of US 6 and road to Morrison, about 1 mile east of Golden. Handsford T. Shacklette 5903. 27 Jun 1959. ( COLO529319‡ ) .
- Parfet Open Space (City of Golden), 4256. 7/16/2025. .
- Kinney Run, Tom Schweich 1846. 5/15/2020. .
- North Hogback Open Space (City of Golden), Tom Schweich 1724. 6/14/2019. .
- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2264. 6/12/2021. .
- Tripp Ranch Meadow Open Space,
Tom Schweich 3588.
6/8/2024.
.
.
 Coll. No. 2302, Allium textile |
 Habitat of Coll. No. 1134, Alliaceae Allium textile |
 Coll. No. 2933, Allium textile |
 Bulb coat of Coll. No. 1134, Allium textile |
 Coll. No. 1134, Allium textile |
Narcissus L. Horticultural Daffodil. CalPhotos. Jepson eFlora. SEINet Taxon.
- Schweich Hill, Few plants near north fence. Tom Schweich 1587. 4/11/2018. .
Araceae
Lemna minor L. Common Duckweed. CalPhotos. Jepson eFlora. SEINet Taxon.
- Tucker Gulch (lower),
Also collected nearby: Salix alba, Berteroa incana, Capsella bursa-pastoris, Heterotheca villosa, Poa bulbosa, and Muscari botryoides.
Running water in a little spring-fed perennial stream tributary to Tucker Gulch, 250 m. upstream of the First Street bridge, 1.98 km. north northwest of the GNIS location of Golden.
Tom Schweich 2275.
12 May 2020.
(
KHD00072973‡
OBI149334‡
)
.
 Coll. No. 2275, Lemna minor |
Asparagaceae
Asparagus officinalis L. Asparagus. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Open Space (City of Golden), 4151. 6/1/2025. .
- Grant Terry Open Space, iNaturalist Observation 95680254. rowtree 5942. 9/21/2021. .
- South Table Mountain Open Space (City of Golden), Isolated plant on W. facing slope. South Table Mountain; S. of Castle Rock, a short distance above homes. 13N 0482100E 4400200N. Peter G. Root 836. 1 Jul 1983. ( KHD18901‡ ) .
- Stonebridge Homeowners Association,
Tom Schweich, with Ann Norton 2265.
6/12/2021.
.
.
 Coll. No. 1510, Asparagus officinalis |
Leucocrinum montanum Nutt. ex A. Gray. Star Lily. CalPhotos. Jepson eFlora. SEINet Taxon.
- Kinney Run South, 4480. 4/9/2026. .
- North Hogback Open Space (City of Golden), Southwest facing slope: with Euphorbia esula, Grindelia squarrosa, Taraxacum officinale, Gutierrezia sarothrae, Artemisia ludoviciana, A. frigida, Andropogon gerardi, and Coryphantha vivipara. Lower slopes of hogback in northernmost Golden, 4.1 km. north northwest of the GNIS location of Golden. Tom Schweich 2757. 26 Apr 2022. ( Golden ) Also here: Linum lewisii, Bromus inermis, Yucca glauca, and Liatris punctata. Seven plants here; one collected. Lower western slope of hogback in northernmost Golden, 4.3 km. north northwest of the GNIS location of Golden. Tom Schweich 2758. 26 Apr 2022. ( Golden ) .
- Schweich Hill,
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Hughway 93 and Washington Avenue. At the top of the hill with Opuntia, Commandra, Castilleja, and Linaria.
Tom Schweich 1592.
2 May 2017.
(
CS
KHD00065348‡
)
.
.
Maianthemum stellatum (L.) Link. Starry False Lily of the Valley. CalPhotos. Jepson eFlora. SEINet Taxon.
- Grant Terry Open Space, iNaturalist Observation 45605582. cdtrujillo 5944. 5/11/2020. iNaturalist Observation 216964154. cragend 5946. 5/19/2024. iNaturalist Observation 158965632. gwynnevere 5945. 5/1/2023. iNaturalist Observation 221110981. janaborrink 5947. 5/20/2024. iNaturalist Observation 31801452. rtoussaint 5943. 8/30/2019. .
- Welch Ditch,
southwest side of ditch at Chimney Gulch bridge.
Tom Schweich 2119.
5/19/2021.
Along the Welch Ditch where it is crossed by the Chimney Gulch Trail, in deep weeds beside the bridge over the ditch, 1.63 km. west southwest of the GNIS location of Golden.
Tom Schweich 2510.
7 Jun 2021.
(
KHD00075596‡
)
.
.
 Coll. No. 2785, Maianthemum stellatum |
 Coll. No. 3000, Maianthemum stellatum. |
 Collection No. 520, Ruscaceae Maianthemum stellatum |
Muscari botryoides (L.) Mill. Common Grape Hyacinth. CalPhotos. Jepson eFlora. SEINet Taxon.
- Heritage Dells, North Gulch, 4638. 4/23/2026. .
- Kinney Run, 4442. 3/30/2026. .
- Magic Mountain Archeological Site, Heritage Dells area, 35 m. east of the Kinney Run Trail, in thin soil on top of a very low hogback, 4.3 km. south of the GNIS location of Golden Tom Schweich 1785. 18 Apr 2018. ( COLO02348050‡ OBI162759‡ ) .
- Schweich Hill, Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue. North-central area, near neighbor's fences. Tom Schweich 1596. 2 May 2017. ( CDA0050064‡ CS KHD00065346‡ ) .
- Tucker Gulch (lower),
Naturalized.
Beside Tucker Gulch Trail, about 100 m. north of the First Street bridge, 1.42 km north northwest of the GNIS location of Golden
Tom Schweich 1332.
11 May 2016.
(
KHD00063423‡
UCR277969‡
)
.
.
 Coll. No. 1310, Muscari botryoides |
 Coll. No. 1786, Muscari botryoides |
Yucca glauca Nutt. Soapweed Yucca. CalPhotos. Jepson eFlora. SEINet Taxon.
- Cressmans Gulch, 4576. 4/15/2026. .
- Cottonwood Natural Area, 3960. 12/27/2024. .
- Grampsas North Open Space (City of Golden), 3923. 12/7/2024. .
- Kinney Run South, 3980. 1/3/2025. 4477. 4/9/2026. .
- Parfet Open Space (City of Golden), 4128. 6/1/2025. .
- Heritage Dells, North Gulch, 4619. 4/23/2026. .
- Magic Mountain Archeological Site, 4345. 7/30/2025. Tom Schweich 1652. 4/18/2018. .
- North Hogback Open Space (City of Golden), Tom Schweich 1709. 6/14/2019. .
- Parfet Prehistoric Preserve, 4028. 4/30/2025. .
- Schweich Hill, Tom Schweich 1502. 3/27/2017. .
- South Table Mountain Open Space (City of Golden), 6026. 5/13/2026. .
- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2263. 6/12/2021. .
- Welch Ditch (Open Space),
4710.
4/25/2026.
.
 Yucca glauca “Soapweed Yucca” on Dakota Ridge. |
Commelinaceae
Tradescantia occidentalis (Britton) Smyth. Prairie Spiderwort. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Open Space (City of Golden), 4159. 6/1/2025. .
- Grant Terry Open Space, iNaturalist Observation 169015444. cmcurtin 5940. 6/23/2023. iNaturalist Observation 306842788. maryadams 5941. 8/16/2025. .
- North Hogback Open Space (City of Golden), Tom Schweich 1733. 6/14/2019. .
- Schweich Hill, Three plants seen here. Tom Schweich 1554. 5/15/2017. In a slightly more exposed area on the south side of the hill. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1662. 16 Jun 2017. ( EIU KHD00065338‡ ) .
- Stonebridge Homeowners Association,
Tom Schweich, with Ann Norton 2266.
6/12/2021.
.
 A Tradescantia occidentalis “Prairie Spiderwort” with intense color. |
 Habitat of Coll. No. 1142, Tradescantia occidentalis |
 Color variation in Tradescantia occidentalis. |
Cyperaceae
Carex L. Sedge. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Table Mountain Open Space (City of Golden),
Tom Schweich, with Cindy Trujillo 2514.1
18 Jun 2021.
(
Discarded.
)
.
.
 Inforescence of Coll. No. 3293, Carex sp. |
Carex bebbii Olney. Bebb's Sedge. CalPhotos. Jepson eFlora. SEINet Taxon.
- Heritage Dells & Tripp Ranch Meadow Open Spaces,
Wet bottom of gulch with Carex occidentalis, Juncus interior, and Salix irrorata.
The three gulches of Heritage Dells were designated a City of Golden Open Space in July, 2025.
Heritage Dells, south gulch, middle section between DeFrance Way and Crawford Street, 135 m. downstream of DeFrance Way, 4.2 km. south of the GNIS location of Golden.
Tom Schweich 3588.
1 Jun 2026.
(
FLD
KHD
OBI
)
.
.
 Coll. No. 3588, Carex bebbii. |
Carex brevior (Dewey) Mack. Shortbeak Sedge. CalPhotos. Jepson eFlora. SEINet Taxon.
Coll. No. 1145, 15 June 2015, characters observed: Grass-like perennial, to 75 cm.; Leaves, basal and lower cauline; Inflorescence, terminal, multiple individually distinct spikelets; Bracts, 9 mm., <inflorescence and spikelets, lacking sheath, strong central vein, Spikelets, 4-6 per stem, 10 mm. × 5 mm. wide, gynecandrous (staminate below, pistillate above); Scales, thin, <perigynia; Perigynia, 4.5 mm. × 3 mm. wide, 1.5 × long as wide, glabrous, margin, ±winged, entire below, serrulate above, beak, 1.4 mm., flat, serrulate to tip; Stigmas, 2; Achene, 2 mm. × 1.5 mm. wide, lenticular. Described from Coll. No. 1145, 15 June 2015.
- North Table Mountain Open Space (City of Golden),
Southwest slopes of North Table Mountain, along an ephemeral stream, about midway between the North Table Mountain Trail below and the Climbing Access Trail above, 1.78 km. north of the GNIS location of Golden.
Tom Schweich, with Cindy Trujillo 2514.
18 Jun 2021.
(
Golden
)
.
.
 Coll. No. 1939, Carex brevior |
 Coll. No. 1450, Carex brevior |
Carex inops L. H. Bailey ssp. heliophila (Mack.) Crins. (Syn: C. pensylvanica Lam. ssp. heliophila (Mack.) W. A. Weber ) Sun Sedge. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 16 cm., prior year leaves to 23 cm.; Rhizome, 5-10(12) cm.; Culm, 11.5 cm. × 0.6 mm., ±triangular, but obscured by white striations at least when dry; Leaves, 12 cm. × 1.5 mm., ±flat, some folded ≤30°.; Inflorescence, multiple spikes, all approximate, 1-2 pistillate spike(s) below, 1 staminate spike above; Bracts, lowest, blade 8 mm., sheath 4.5 mm., papery; Pistillate spike, peduncled 1.0-1.3 mm., 9 mm., brown (not black); Staminate spike, terminal, 12-16 mm., ovoid (not cylindric), brown (not black); Scales, >perigynum body; Perigynum, pubescent on faces, margin ciliate; Achenes, unknown. Described from Coll. No. 1079, 23 April 2015, and Coll. No. 1568, 3 Apr 2017.
- Eagle Ridge, Tom Schweich 3039. 5/9/2023. .
- Heritage Dells, North Gulch, 4633. 4/23/2026. .
- Heritage Dells, South Gulch, 4493. 4/9/2026. 4504. 4/9/2026. .
- , Grassy east-facing slope, most other plants still dormant or just beginning to grow. Lowest slopes of Mount Zion, below Windy Saddle Park, 1.25 km southwest of the GNIS location of Golden. Tom Schweich 1568. 03 Apr 2017. ( CDA0050039‡ COLO2299741‡ CS EIU JCOS s.n. ) .
- Magic Mountain Archeological Site, Heritage Dells area, 47 m. east of the Kinney Run Trail, in thin soil on top of a very low hogback, 4.34 km. south of the GNIS location of Golden Tom Schweich 1787. 18 Apr 2018. ( COLO02348019‡ KHD00068994‡ ) .
- North Hogback Open Space (City of Golden), 4519. 4/11/2026. .
- North Table Mountain Open Space (City of Golden), Beside trail, 8 plants in small group, staminate flowers only, lowest southwest slopes. Tom Schweich 1584. 3/14/2018. Southwest corner of North Table Mountain, exposed sites on lower slopes, near City of Golden North Table Mountain trail, 1.23 km. north of the GNIS location of Golden. Tom Schweich 1777. 11 Apr 2018. ( CAS1040280‡ JCOS s.n. KHD00068992‡ UCR289039‡ ) .
- Schweich Hill, Three collections of the Sun Sedge bearing the suffixes .0, .1, and .2 were made this day relatively near to each other. Scattered across the top and southwest slope of the hill with somewhat intact mixed-grass prairie, 1.76 km. northwest of the GNIS location of Golden. Tom Schweich 1797. 28 Apr 2018. ( KHD00068995‡ ) Three collections of the Sun Sedge bearing the suffixes .0, .1, and .2 were made this day relatively near to each other. Scattered across the top and southwest slope of the hill with somewhat intact mixed-grass prairie, 1.76 km. northwest of the GNIS location of Golden. Tom Schweich 1797.1 28 Apr 2018. ( CDA0052340‡ ) Three collections of the Sun Sedge bearing the suffixes .0, .1, and .2 were made this day relatively near to each other. Scattered across the top and southwest slope of the hill with somewhat intact mixed-grass prairie, 1.76 km. northwest of the GNIS location of Golden. Tom Schweich 1797.2 28 Apr 2018. ( OBI124862‡ ) .
- Stonebridge Homeowners Association,
Tom Schweich, with Ann Norton 2267.
6/12/2021.
.
.
Carex occidentalis L. H. Bailey. Western Sedge. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial sedge; Habit, caespitose; Culms, to 50 cm., slightly scabrous especially below the inflorescence; Leaves, 1.7 mm. wide, green, sheaths, white-hyaline, ventrally smooth; Inflorescence, 29 mm. × 10 mm. wide, loosely clustered; Spikes, identical appearing, 6 mm. × 5 mm. wide, terminal and lateral androgynous (there are no anthers, but the flowers at the top of each spike contain white filaments); Bracts, 5 mm., proximal, 10 mm., <inflorescence, leaf-like; Pistillate scales, 3.5 mm., <perigynia, mid-vein green, brown laterally, hyaline margin; Perigynia, #12 per spike, 4 mm. × 1.6-1.8(2) mm. wide, weakly winged, ±veinless, glabrous, beak, 1 mm., flattish, dorsally bulged and the margin is displaced but not onto the ventral face; Achene, 2.3 mm. × 1.5 mm. wide, biconvex, short oblong; Stigmas, #2; Anthers, n/a; (Described from Coll. No. 2056, 4 Jun 2019, but see also Coll. No. 1913 & 3567.)
- Heritage Dells & Tripp Ranch Meadow Open Spaces, Wet bottom of gulch with Carex bebbii, Juncus interior, and Salix irrorata. Heritage Dells, south gulch, middle section between DeFrance Way and Crawford Street, 135 m. downstream of DeFrance Way, 4.2 km. south of the GNIS location of Golden. Tom Schweich 3587. 1 Jun 2026. .
- North Table Mountain Open Space (City of Golden),
Small grassy areas on the upper southwest slope of North Table Mountain, hummocky terrain, probably in the head of one or more landslides, 1.98 km. north of the GNIS location of Golden.
Tom Schweich 2056.
4 Jun 2019.
(
KHD00070515‡
)
.
.
Carex pellita Muhl. ex Willd. (Syn: Carex lanuginosa Michx. ) Wooly Sedge. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space,
5989.
5/11/2026.
.
.
 Observation of Carex pellita |
Eleocharis acicularis (L.) Roem. & Schult. Needle Spikerush. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space,
5984.
5/11/2026.
.
.
 Habitat of Coll. No. 1832, Eleocharis cf. acicularis |
 Coll. No. 1832, Eleocharis cf. acicularis |
 Coll. No. 1832, Eleocharis cf. acicularis |
Schoenoplectus tabernaemontani (C.C.Gmel.) Palla. (Syn: Scirpus lacustris L. var. validus (Vahl) Kük. , Scirpus validus Vahl ) Softstem Bulrush. CalPhotos. Jepson eFlora. SEINet Taxon.
- Kinney Run, In Deadman Gulch, also euphemistically called Kinney Run, along Illinois Street between US Highway 6 and the Fossil Trace Golf Club, 2.15 km. south southeast of the GNIS location of Golden. Tom Schweich 1962. 6 Jul 2018. ( COLO02348613‡ KHD00068968‡ OBI UC ) .
- Tucker Gulch (lower),
In the water of Tucker Gulch, the stream draining Golden Gate Canyon, between Joseph Circle and Colorado Highway 93, 2.92 km. northwest of the GNIS location of Golden.
Tom Schweich 2847.
6 Jul 2022.
(
CAS
CS201817‡
EIU
FLD
REGIS
)
.
.
 Coll. No. 1962, Schoenoplectus tabernaemontani |
Scirpus pallidus (Britt.) Fern. Cloaked Bulrush. CalPhotos. Jepson eFlora. SEINet Taxon.
- Kinney Run,
On a bank of Kinney Run, between the Cambria Lime Kiln and Tripp Ranch, 3.06 km. south southeast of the GNIS location of Golden.
Tom Schweich 1965.
6 Jul 2018.
(
COLO02348589‡
KHD00068959‡
OBI
)
.
 Coll. No. 1488, Scirpus pallidus |
Iridaceae
Iris L. Horticultural Iris. CalPhotos. Jepson eFlora. SEINet Taxon.
- Cressmans Gulch, 4553. 4/15/2026. .
- Grant Terry Open Space, iNaturalist Observation 164445029. jack_i 5948. 5/29/2023. beside Grant Terry trail Tom Schweich 2028. 4/8/2021. .
- Heritage Dells, North Gulch, 4637. 4/23/2026. .
- Heritage Dells, South Gulch, 6128. 6/1/2026. .
- Kinney Run, 4451. 3/30/2026. .
- Schweich Hill, Tom Schweich 1530. 3/27/2017. Few plants near north fence. Tom Schweich 1586. 4/11/2018. .
- Welch Ditch (Open Space), 4722. 4/25/2026. 4739. 4/25/2026. .
Juncaceae
Juncus L. Rush. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space,
5969.
5/11/2026.
no inflorescence seen
5986.
5/11/2026.
.
.
 Coll. No. 1274, Juncus |
Juncus arcticus (Willd.) Trautv. var. balticus (Willdenow) Trautvetter. (Syn: Juncus arcticus (Willd.) Trautv. ssp. ater (Rydb.) Hultén , Juncus ater Rydb. , Juncus balticus Willd. , Juncus balticus Willd. ssp. ater (Rydb.) Snogerup , J. balticus Willd. var. montanus Engelm. ) Arctic Rush. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial, to 1 m.; Leaves, basal sheaths only; Inflorescence, appears lateral; Bract, appearing to be extension of stem, 14-18 cm., >stem; Flowers, many per stem, (obs. 20); Stamens, 5. Described from Coll. No. 1269, 29 Jul 2015.
- Parfet Open Space (City of Golden),
4247.
7/16/2025.
Also collected here: Arnica fulgens.
This parcel was designated a City of Golden Open Space in 2025.
Edge of the parasailer landing field along US Highway 6, below the Welch Ditch, near the northeast boundary of the open space, disturbed mixed-grass prairie, 930 m. southwest of the GNIS location of Golden.
Tom Schweich 3395.
1 Jun 2025.
(
OBI
)
.
.
 Coll. No. 3018, Juncus arcticus var. balticus. |
 Coll. No. 1269, Juncus arcticus var. balticus |
Juncus articulatus L. Joint-Leaf Rush. CalPhotos. Jepson eFlora. SEINet Taxon.
- Deadman Gulch,
Also collected here: Arctium minus, Cyclachaena xanthiifolia, and a horticultural Salvia.
Along Deadman Gulch (Kinney Run), between US Highway 6 and Eagle Ridge Drive, on a bank of the creek, just upstream of a retention pond, 3.24 km. south of the GNIS location of Golden.
Tom Schweich 2426.
17 Aug 2020.
(
COLO2434041‡
KHD00074290‡
OBI186035‡
)
.
.
 Coll. No. 2426, Juncus articulatus. |
Juncus interior Wiegand. Inland Rush. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial graminoid, to 45 cm., Culm, 40 cm, round, 1 mm. dia.; Leaves, basal, outer, 7 mm., sheath-like, inner, sheath, 80 mm., open, ligule, 0.5 mm., membraneous, blade, 225 mm., rolled; Bracts, #2, 85 mm., 46 mm.; Pedicel, 3 mm., bract, 2 mm.; Flowers, #17, closely subtended by a pair of scarious bracteoles; Tepals, 3.2 mm. lanceolate, tip acuminate, green center, then light brown strips, then scarious margin; Capsule, 3.5 mm., rounded at summit, placenta extends nearly to tip; Seeds, 0.5 mm., oblong, not tailed, annular grooves; (Described from Coll. No. 1527, 5 August 2014).
- Heritage Dells & Tripp Ranch Meadow Open Spaces, Wet bottom of gulch with Carex occidentalis, Carex bebbii, and Salix irrorata. The three gulches of Heritage Dells were designated a City of Golden Open Space in July, 2025. Heritage Dells, south gulch, middle section between DeFrance Way and Crawford Street, 135 m. downstream of DeFrance Way, 4.2 km. south of the GNIS location of Golden. Tom Schweich 3589. 1 Jun 2026. ( FLD ) .
- North Table Mountain Open Space (City of Golden), Small wetland where the North Table Mountain Trail crosses a watercourse below a near-perennial spring that is higher on the south slope of the mesa. Lower south slopes of North Table Mountain, above Peery Parkway, 250 m. south of the USBR monument “North Table,”1.25 km. north of the GNIS location of Golden. Tom Schweich 1527. 5 Aug 2016. ( JCOS s.n. KHD00063447‡ ) Previously collected here: Rumex crispus, Poa palustris, Elymus trachycaulus, and Thlaspi arvense. Southwest slope of North Table Mountain, where a spring-fed stream crosses the City of Golden North Table Mountain Trail, forming a very small wetland, 1.66 km. north of the GNIS location of Golden. Tom Schweich, with Cindy Trujillo 2513. 18 Jun 2021. ( Golden ) .
- Stonebridge Homeowners Association,
Tom Schweich, with Ann Norton 2268.
6/12/2021.
.
.
Juncus torreyi Coville. Torrey's Rush. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Open Space (City of Golden),
Also collected here: Clematis ligusticifolia.
Designated a City of Golden Open Space in July 2025.
iNaturalist Observation 298436857.
Western edge of Parfet Open Space, in still water just below a spring, 1.16 km. southwest of the GNIS location of Golden.
Tom Schweich 3451.
16 Jul 2025.
(
JCOS s.n.
KHD
OBI
UCR
)
.
Liliaceae
Calochortus gunnisonii S. Watson. Gunnison's Mariposa Lily. CalPhotos. Jepson eFlora. SEINet Taxon.
- Eagle Ridge, On mesa slope in foothills. Notes: Transferred from USGS Herbarium, Denver, CO (2005). United States, Colorado, Jefferson, Foothills of Front Range, at junction of US 6 and road to Morrison, about 1 mile east of Golden. Handsford T. Shacklette 5900. 27 Jun 1959. ( COLO529323‡ ) .
- North Table Mountain Open Space (City of Golden),
Mixed grasses and forbs.
Southwest slope of North Table Mountain, just below the basalt rim, where a social trail climbs through the rim from the City of Golden North Table Mountain trail, 1.7 km. north of the GNIS location of Golden.
Tom Schweich, with Greg McKittrick 1444.
22 Jun 2016.
(
JCOS s.n.
KHD00063426‡
)
.
Melanthiaceae
Toxicoscordion paniculatum (Nutt.) Rydb. (Syn: Zigadenus paniculatus (Nutt.) S. Watson , Zigadenus paniculatus (Nutt.) S. Watson ) Foothill Death Camas. CalPhotos. Jepson eFlora. SEINet Taxon.
- Kinney Run South, 4475. 4/9/2026. .
- Parfet Open Space (City of Golden), 4173. 6/1/2025. .
- Kinney Run, Northwest slope of a small hill between Kinney Run and Deadman Gulch, 2.84 km. south of the GNIS location of Golden. Tom Schweich 1824. 16 May 2018. ( COLO2348266‡ ) [ Original determination: Zigadenus paniculatus var. gramineus. ] Tom Schweich 1843. 5/15/2020. .
- North Table Mountain Open Space (City of Golden), 4195. 6/23/2025. .
- South Table Mountain Open Space (City of Golden), A lava capped mesa in the Denver Formation; along trail on W. facing slope; uncommon. South Table Mountain; S. of Castle Rock; under Mount Mahogany. 13N 0482100E 4400200N. Loraine Yeatts 904. 6 Jun 1984. ( KHD21102‡ ) . [ Original determination: Toxicodendron venenosum. ]
- Tripp Ranch Meadow Open Space,
2786.
6/10/2022.
.
 Likely Toxicoscordion paniculatum whose leaf tips were scorched by the Hogback Fire (2023). |
 Inflorescence of Coll. No. 2055, Toxicoscordion paniculatum |
Orchidaceae
Goodyera oblongifolia Raf. Western Rattlesnake Plantain. CalPhotos. Jepson eFlora. SEINet Taxon.
- Deadman Gulch, Heavily timbered slopes. Deadman's Gulch: above Golden. Edmund R. Cross 529. 18 Aug 1912. ( RM446911‡ ) . .
Spiranthes diluvialis Sheviak. Ute Lady's Tresses. CalPhotos. Jepson eFlora. SEINet Taxon.
- Grant Terry Open Space,
5959.
5959.
.
 Spiranthes diluvialis |
Poaceae
. Grass Family. CalPhotos. Jepson eFlora. SEINet Taxon.
- Schweich Hill,
Same grass as Coll. No. 1774.
Revegetated section in southeast portion of parcel, 1.7 km northwest of the GNIS location of Golden.
Tom Schweich 1773.
4 Mar 2018.
(
Golden
)
Revegetated section in northwest portion of parcel, 1.8 km northwest of the GNIS location of Golden.
Tom Schweich 1774.
4 Mar 2018.
(
Golden
)
.
.
 Coll. No. 3036, unknown grass. |
Aegilops cylindrica Host. (Syn: Cylindropyrum cylindricum (Host) Á.Löve ) Jointed Goat Grass. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon.
- Heritage Dells, South Gulch, 6141. 6/1/2026. .
- North Table Mountain Open Space (City of Golden), Highest prairie mixed with foothill shrubs, also collected nearby Sphaeralcea coccinea, Linaria dalmatica, and Thinopyrum intermedium. Lower southwest slopes of North Table Mountain, along the lower portion of the City of Golden North Table Mountain trail, 1.9 km. north of the GNIS location of Golden. Tom Schweich 2050. 4 Jun 2019. ( CAS REGIS UC ) .
- Schweich Hill,
Colorado Noxious Weed List B.
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden.
Tom Schweich 1946.
15 Jun 2018.
(
COLO02348308‡
KHD00069361‡
)
.
.
 Inflorescence of Coll. No. 1139, Aegilops cylindrica |
 Inflorescence of Coll. No. 1139, Aegilops cylindrica |
Agropyron cristatum (L.) Gaertn. Crested Wheat Grass. CalPhotos. Jepson eFlora. SEINet Taxon.
- Cottonwood Natural Area, 3959. 12/27/2024. .
- Kinney Run South, 4478. 4/9/2026. .
- Parfet Open Space (City of Golden), 4172. 6/1/2025. .
- South Illinois Open Space, 3942. 12/20/2024. .
- Heritage Dells, South Gulch, 6119. 6/1/2026. .
- Kinney Run, Tom Schweich, with Suzy Stutzmann and Laurel Starr. 2966. 3/30/2023. .
- Magic Mountain Archeological Site, 4335. 7/30/2025. .
- Parfet Prehistoric Preserve, 4015. 4/30/2025. .
- Schweich Hill, Tom Schweich 1498. 3/27/2017. Top of hill, near social trail. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1856. 18 May 2018. ( JCOS s.n. KHD00069362‡ ) .
- South Table Mountain Open Space (City of Golden), 6045. 5/13/2026. .
- Stonebridge Homeowners Association, Tom Schweich 3269. 6/13/2023. .
- Tripp Ranch Meadow Open Space,
2754.
6/10/2022.
.
.
Agrostis gigantea Roth. (Syn: Agrostis alba L. ) Redtop. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial grass, to 95 cm., rhizomatous; Roots, fibrous; Stem, herbaceous; Leaves, blade and sheath differentiated, sheath, 80 mm., open, glabrous, ligule, membranous, 4 mm., auricles, absent, blade, 70 mm. × 2 mm. wide, flat, scabrous; Inflorescence, 1 per culm, >leaves, panicle, 15 cm. × 4 cm. wide, 5-7 branches; Rachis, not extended, sparsely scabrous; Spikelets, many, 2.3 mm. × 0.7 mm. wide, similar, borne singly, pedicels, 0.7-2.0 mm., 1-flowered; Compression, unremarkable; Disarticulation, above the glumes; Glumes, lower, 1.8 mm., veins, #1, sparsely scabrous, upper, 1.8 mm., >lowest floret, veins, #3, obscure, ±parallel; Lemma, 1.7 mm., <glumes, membranous, veins, ≤3; Palea, 1.0 mm., <lemma; Anthers, #3, 1.2 mm. (Described from Coll. No. 1980, 13 July 2018.)
- Parfet Open Space (City of Golden), Small swale, with Ambrosia psilostachya, Linum sp., Bromus inermis, and Festuca sp. Designated a City of Golden Open Space in July 2025. Western side of Parfet Open Space, about mid-slope between Welch Ditch and the houses, 1.15 km. southwest of the GNIS location of Golden. Tom Schweich 3450. 16 Jul 2025. ( CAS FLD KHD ) .
- Magic Mountain Archeological Site,
[“PM” on the label is strong evidence this was collected near Magic Mountain Archeological Site.]
Jefferson County, Colo.
E. H. Brunquist 11.
16 Aug 1959.
(
KHD16047‡
)
.
.
 E. H. Brunquist collection of Agrostis gigantea |
 My collection of Agrostis gigantea from Ranson/Edwards. |
 Coll. No. 1225, Agrostis stolonifera |
Alopecurus aequalis Sobol. Shortawn Foxtail. CalPhotos. Jepson eFlora. SEINet Taxon.
- Tucker Gulch (lower), Swampy place. United States, Colorado, Jefferson, Tucker's Gulch, near Golden Lois S. Ehlers 297. 16 Jul 1922. ( MICH1404312‡ MICH1404313‡ ) . .
Alopecurus arundinaceus Poir. Creeping Reed Foxtail. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial, to 90 cm., rhizomatous; Leaves, Sheath, open, 10 cm.; Ligule, membraneous, 2 mm.; Auricles, 0; Blade, flat, 10 cm., glabrous, finely scabrous on margins; Inflorescence, spike-like, 80 mm. × 12 mm. wide, contracted panicle of up to 4 branches, spikelets many; Rachis, glabrous; Compression, lateral; Spikelets, similar, 1 per node, 1-flowered; Florets, 1 per spikelet; Glumes, #2, 4.5 mm., ±equal, keeled ciliate, veins 3, awns 0, apex acute, apices divergent; Lemma, 4 mm., < glumes, membraneous, keeled, glabrous, veins parallel, apex truncate to obtuse, awns #1, 1-2 mm., straight, attached middle; Palea, absent; Stamens, #3 (Described from Coll. No. 1334, 11 May 2016).
- Tucker Gulch (lower),
Growing adjacent to running water in creek.
135 m. north of First Street bridge, 1.46 km north northwest of the GNIS location of Golden
Tom Schweich 1334.
11 May 2016.
(
CS
KHD00063432‡
UCR277968‡
)
Rooted in the lowest bank of the creek. Also collected nearby: Chorispora tenella, Euphorbia esula, Ranunculus acris, and Poa bulbosa.
Same as Coll. No. 1334, 11 May 2016, made 200 m. upstream.
Creekside just below the First Street Bridge, 1.69 km. north northwest of the GNIS location of Golden
Tom Schweich 2274.1
12 May 2020.
(
CAS
CDA0053734‡
OBI149329‡
)
.
.
 Schweich collection of Alopecurus arundinaceus |
 Coll. No. 2274.1, Alopecurus arundinaceus. |
Andropogon gerardii Vitman. Big Bluestem. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial, to 85 cm., clumped, rhizomes unknown; Leaves, blade and sheath differentiated; Sheath, 11 cm., open; Ligule, membraneous (though surrounded by hairs), 3 mm., auricles 0; Blade, soft, flat, 27 cm., hairy near ligule; Inflorescence, 80 mm., > leaves, 1-2 per stem, in 5-6 digitate branches, spikelets many; Rachis, soft bristles on margins and at nodes; Disarticulation at nodes of rachis; Spikelets in pairs, Sterile spikelet, 7 mm., pedicel 4.5 mm.; Fertile spikelet, Florets #1, Glumes, awns 0, ±equal, lower keeled, upper flattened and grooved; Lemma, 6 mm., membraneous, rolled, glabrous, tip 2-forked, awn, #1, 13 mm., bent, twisted, attached on back; Stamens, 3; Anthers, yellow; Ovary, glabrous; Stigma, feathery. (Described from Coll. No. 1060, 28 Aug 2014).
- Grampsas North Open Space (City of Golden), 3924. 12/7/2024. .
- Parfet Open Space (City of Golden), 4403. 9/11/2025. .
- Grant Terry Open Space, iNaturalist Observation 179235130. maryadams 5920. 8/19/2023. .
- Kinney Run, one clump at base of artificial slope. Tom Schweich 1990. 7/31/2020. .
- Magic Mountain Archeological Site, 4342. 7/30/2025. .
- North Hogback Open Space (City of Golden), 4273. 7/20/2025. in rock outcrops along top of ridge Tom Schweich 1984. 7/29/2020. .
- North Table Mountain Open Space (City of Golden), Collected with Mirabilis linearis. South side of North Table Mountain, below Climbing Access Trail near the top of the slope; 260 m. southeast of the USBR monument designated “North Table,” 1.38 km. north northeast of the GNIS location of Golden. Tom Schweich 1524. 5 Aug 2016. ( EIU JCOS s.n. KHD00063433‡ ) .
- Parfet Prehistoric Preserve, 4060. 5/12/2025. .
- Schweich Hill, Tom Schweich 1581. 11/1/2017. .
- Stonebridge Homeowners Association,
Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2320.
7/24/2020.
Sovell, John R., and Susan S. Panjabi, 2021
Tom Schweich, with Ann Norton 2272.
6/12/2021.
.
.
 Dissected spikelet pair of Coll. No. 1060, Andropogon gerardii |
 Inflorescence of Coll. No. 1265, Andropogon gerardii |
 Spikelets of Coll. No. 1265, Andropogon gerardii |
Aristida purpurea Nutt. var. longiseta (Steud.) Vasey. (Syn: Aristida longiseta Steud. ) Purple Threeawn. CalPhotos. Jepson eFlora. SEINet Taxon.
Coll. No. 1140, 9 Jun 2015, characters observed: Perennial grass, 20 cm. when collected, possibly elongating in maturity; Inflorescence, panicle, branches not pulvinate, i.e., no swelling at bases of pedicels; Axis ±straight; Pedicels, stiff, ±straight; Spikelets with 1 floret; Glumes, 2, lower, 11 mm., veins 1, upper, 20 mm.; Lemma, 11 mm., smoothly transitioning to awns without twisted column, apex 0.4-0.6 mm. wide, awns, 3, 58 mm., straight. Described from Coll. No. 1140, 9 Jun 2015, determined var. longiseta per length of upper glumes and dimensions of lemma.
- Schweich Hill,
2795.
6/12/2022.
.
.
 Coll. No. 1140, Aristida purpurea |
 Habitat of three common grasses in Windy Saddle Park |
 Coll. No. 1140, Aristida purpurea var. longiseta |
Arrhenatherum elatius (L.) P. Beauv. ex J. Presl & C. Presl. Tall Oatgrass. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial, to 115 cm., tufted, no rhizomes observed; Leaves, sheath, 100 mm., open, ligule, 2.5 mm., membranous, erose, blade, 30 mm. × 5 mm. wide, flat, barely scabrous; Inflorescence, 1 per culm, >leaves, panicle, 200 mm. × 40 mm. wide; Rachis, not extended, delicate; Spikelets, many, 8 mm. × 2.3 mm. wide + awn, similar, borne singly; Disarticulation, above the glumes; Glumes, very thin, translucent, lower, 5 mm., veins, #1, tip bifid, upper, 9 mm., =lowest floret, veins, #3, ±parallel, awns, absent; Florets, 2 per spikelet; Callus, straight hairs, 2.3 mm.; Lemma, 8 mm., =glumes, veins, #7, awn, #1, 14 mm., twisted, round, attached near base (2.3/8.0); Palea, 6 mm., membranous, margin, ciliate. (Described from Coll. No. 2442, 28 August 2020).
- Deadman Gulch,
Riparian, also seen or collected nearby: Clematis ligusticifolia, Mirabilis nyctaginea, Crataegus succulenta, Epilobium hirsutum, and Symphyotrichum lanceolatum var. hesperium.
On the edge of the streambed in Deadman Gulch (Kinney Run), above US Highway 6 and just below Eagle Ridge Drive, 3.43 km. south of the GNIS location of Golden.
Tom Schweich 2442.
28 Aug 2020.
(
KHD00073944‡
)
.
.
 Coll. No. 2442, Arrhenatherum elatius |
Bouteloua curtipendula (Michx.) Torr. Sideoats Grama. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Open Space (City of Golden), 4402. 9/11/2025. .
- Magic Mountain Archeological Site, 4338. 7/30/2025. .
- Stonebridge Homeowners Association,
Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2321.
7/24/2020.
Sovell, John R., and Susan S. Panjabi, 2021
.
.
Habitat of three common grasses in Windy Saddle Park |
 Coll. No. 1241, Bouteloua curtipendula |
 Coll. No. 1241, Bouteloua curtipendula |
Bouteloua dactyloides (Nutt.) J.T. Columbus. (Syn: Buchloe dactyloides (Nutt.) Engelm. ) Buffalo Grass. CalPhotos. Jepson eFlora. SEINet Taxon.
- Schweich Hill, At intersection of social trails, southeast corner. Tom Schweich 1673. 4/16/2019. Northeast section where the neighbors have mowed the smooth brome. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1673. 16 Jun 2017. ( KHD00065144‡ UCR ‡ ) .
- Tripp Ranch Meadow Open Space,
2784.
6/10/2022.
.
.
Bouteloua gracilis (Kunth) Lag. ex Griffiths. (Syn: Chondrosum gracile Kunth ) Blue Grama. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Prehistoric Preserve, 4004. 4/30/2025. .
- Schweich Hill,
Northeast corner of parcels, in an area of much smooth brome that has been mowed by neighbors to the north.
Tom Schweich 1744.
31 Aug 2017.
(
KHD65147‡
UCR289281‡
)
.
.
Bromus carinatus Hook. & Arn. (Syn: Ceratochloa carinata (Hook. & Arn.) Tutin ) California Brome. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial grass, height 60-90 cm., clumped; Leaves, sheath and blade differentiated, soft; Sheath, 80 mm., closed, generally glabrous, except collar somewhat hairy; Ligule, membraneous, 2 mm.; Auricles, absent; Blade, 140 mm. × 7 mm. wide, flat, scabrous, mid-rib prominent; Inflorescence, 1 per culm, >leaves, panicle, 180-200 mm. × 40-90 mm. wide; Rachis, not extended, minutely scabrous on abaxial side; Spikelets, many (#22-26), 36 mm. × 11 mm. wide, similar, 1 per node; Compression, lateral; Disarticulation, between the florets; Glumes, lower, 9.5 mm., veins, #5, distinct, upper, 12 mm., <lowest floret, veins, #7, distinct keeled, membraneous, awns, 0, margins short ciliate; Florets, 6 per spikelet; Rachilla, exposed, scabrous on abaxial side, not extended; Lemma, 13 mm., broad, 2.5 mm. midvein to margin, >glumes,ovate, keeled distally, finely short hairy throughout, veins, #9, glabrous, margins, scarious, tip, entire, awns, #1, 8 mm., straight, attached near tip; Palea, 7 mm., <lemma, keel, ciliate, veins, green, margin, glabrous, tip, entire; Anthers, 3.6 mm., yellow; Ovary, hairy. [Described from Coll. No. 2090, 26 June 2019, which I believe was a commercial cultivar used in revegetation. Keys poorly in most Colorado floras, but quite nicely to B. carinatus var. carinatus in the Jepson Manual, in good part by the length of the lemma awn.]
- Schweich Hill,
Extreme southeastern corner of open space, probably planted as revegetation following construction of condominiums at 410-416 N. Ford St.
Probably var. carinatus if infraspecific names are to be applied.
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 2.20 km. northwest of the GNIS location of Golden.
Tom Schweich 2090.
26 Jun 2019.
(
COLO2433506‡
CS
KHD00070507‡
)
.
.
 Coll. No. 2090, Bromus carinatus |
 Inflorescence of Coll. No. 2090, Bromus carinatus |
 Spikelets of Coll. No. 2090, Bromus carinatus |
Bromus inermis Leyss. (Syn: B. inermis Leyss. ssp. inermis ) Smooth Brome. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial grass to 1 m., rhizomatous; Leaves, sheath, 8-11 cm., closed, ligule, <1 mm., membraneous, blade, 12-17 cm × 0.5 cm., flat, soft, with a distinguishing fold, usually described as an “M” or a “W” that is difficult to see when dry; Inflorescence, panicle, 15 cm. × 4 cm. wide, multiple 1° branches per node, mostly on one side of rachis; Spikelets, 1 per node on 1° and 2° panicle branches, 15-24 mm. × 5 mm. wide, laterally compressed, 2-6 florets per spikelet; Glumes, 2, keeled, glabrous, lower, 7-8 mm., veins 1 upper, 8-10 mm., <lowest floret; Rachilla, sparsely hairy on abaxial side, extended beyond uppermost floret or not; Callus, small, glabrous; Lemma, 11-12 mm., veins, 3, 5, 7, obvious, tip bifid, some awned; Awn (when present), 1.0-1.6 mm., arising near tip of lemma; Palea, 9 mm., veins ciliate. (Described from Coll. No. 1113, 26 May 2014, and Coll. No. 1219, 16 Jul 2015).
- Coors Tech Wetland Open Space, 5964. 5/11/2026. .
- Cottonwood Natural Area, 3955. 12/27/2024. .
- Grampsas North Open Space (City of Golden), 3928. 12/7/2024. .
- Kinney Run South, 3976. 1/3/2025. 4479. 4/9/2026. .
- Parfet Open Space (City of Golden), 4106. 6/1/2025. .
- South Illinois Open Space, 3941. 12/20/2024. .
- Heritage Dells, North Gulch, 4607. 4/23/2026. .
- Heritage Dells, South Gulch, 6115. 6/1/2026. .
- Kinney Run, Tom Schweich 1635. 7/6/2018. .
- Magic Mountain Archeological Site, 4337. 7/30/2025. .
- Schweich Hill, Tom Schweich 1497. 3/27/2017. Northeast corner of the parcel, where there is nearly a monoculture of smooth brome with a few Canada thistle. Some of the neighbors have taken to mowing this area. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1660. 16 Jun 2017. ( CDA0050019‡ EIU KHD00065075‡ ) .
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2322. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 Tom Schweich, with Ann Norton 2273. 6/12/2021. .
- Tripp Ranch Meadow Open Space, 2742. 6/10/2022. .
- Tucker Gulch (lower), Streamside with cottonwoods (Populus deltoides), box elders (Acer negundo) and chokecherries (Prunus virginiana). Valuable agricultural grass that is invasive of native grasslands. North bank of Tucker Gulch, the stream that drains Golden Gate Canyon, just west of North Ford Street, 2.55km. north northwest of the GNIS location of Golden. Tom Schweich 2843. 6 Jul 2022. .
- Welch Ditch (Open Space),
4716.
4/25/2026.
.
.
Bromus japonicus Thunb. Japanese Cheat Grass. CalPhotos. Jepson eFlora. SEINet Taxon.
Coll. No. 1207, 13 Jul 2015, characters observed: Annual grass, to 40 cm.; Leaves, sheath, 60 mm. closed + 12 mm. open, pilose (but not densely so), ligule, membraneous, + some hairs, blade, hairy; Inflorescence, panicle, >leaves; Pedicel, 20 mm.; Spikelets, 1-3 per panicle branch, 22 mm. × 6 mm. wide, elliptical, drooping; Glumes, #2, <lowest floret, lower, 4.5 mm., veins 3, upper, 5.5 mm., veins 5; Rachilla, short hairy; Callus, glabrous; Florets, #12, 2-ranked, closely held hiding rachilla; Disarticulation between florets; Lemma, 8 mm. × 4 mm. wide, margin, hyaline, 0.5 mm., tip bifid, awn, #1, 5-12 mm. long, mid-spikelet awns longest, flattened at base, not twisted, attached near bifid tip. Described from Coll. No. 1207, 13 Jul 2015.
- Grampsas North Open Space (City of Golden), 4296. 7/25/2025. .
- Parfet Open Space (City of Golden), 4157. 6/1/2025. .
- North Hogback Open Space (City of Golden), Tom Schweich 1698. 6/14/2019. Also collected here: Helianthus pumilis, and Nassella viridula, and nearby: Hypericum perforatum, Potentilla recta, and Muhlenbergia montana. Hogback at the northern city limits of Golden, 3/4 of the way up the west-facing slope, at the lower edge of Cercocarpus montanus, 4.41 km. north northwest of the GNIS location of Golden. Tom Schweich 2355. 12 Jun 2020. ( EIU OBI149322‡ UCR297598‡ ) .
- North Table Mountain Open Space (City of Golden), Low shrubs, forbs, and grasses, with Grindelia subalpina, Heterotheca villosa, Lupinus argenteus var. argenteus, Monarda fistulosa, and Carex inops var. heliophila. Southwest slope of North Table Mountain, northern part of the open space, along a social trail, in an area of hummocky ground suggesting an ancient landslide, 2.34 km. north of the GNIS location of Golden. Tom Schweich 3424. 23 Jun 2025. ( UCR ) .
- Schweich Hill, Far western, revegetated, part of parcel. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1669. 16 Jun 2017. ( KHD00065145‡ OBI124850‡ ) .
- South Table Mountain Open Space (City of Golden), 6021. 5/13/2026. .
- Stonebridge Homeowners Association,
Tom Schweich, with Ann Norton 2274.
6/12/2021.
.
.
 Coll. No. 1207, Bromus japonicus |
 Coll. No. 1461, Bromus japonicus |
 Coll. No. 1207, Bromus japonicus |
 Coll. No. 1207, Bromus japonicus |
Bromus tectorum L. (Syn: B. tectorum L. var. glabratus Spenn. ) Cheat Grass. Weed: CO DofA, List: C. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual grass, to 30 cm.; Leaves, Sheath, 50 mm., closed proximal ⅔, open distally, Ligule, membraneous, 1 mm.; Blade, 60 mm.; Inflorescence, open panicle, rachis and pedicels short hairy, Spikelets, 1 per node, 15 mm., laterally compressed; Glumes, 2, sparsely hairy, margins scarious, lower, 2.3 mm., veins indistinct, upper, 4.5 mm. Callus, glabrous, very short, Florets, ±6, Lemma, 6.5 mm., 0.7 from mid-vein to margin, back rounded, sparsely hairy, tip, forked, teeth 1 mm., awned from near tip, awn, 5-7 mm.; Anthers, 3, 0.4 mm. Described from Coll. No. 1112, 26 May 2015. Dimensions are small for B. tectorum, perhaps because of the early date of collection.
- Coors Tech Wetland Open Space, 5998. 5/11/2026. .
- Grampsas North Open Space (City of Golden), 3921. 12/7/2024. .
- Parfet Open Space (City of Golden), 4100. 6/1/2025. .
- Heritage Dells, North Gulch, 4652. 4/23/2026. .
- Heritage Dells, South Gulch, 6130. 6/1/2026. .
- North Hogback Open Space (City of Golden), Tom Schweich 1699. 6/14/2019. Southwest slope, near top of hogback; foothills mountain mahogany shrubland; also collected here: Ribes cereum, Amelanchier alnifolia, Cercocarpus montanus, Potentilla recta, and Viola nuttallii. Southern end of the hogback in northernmost Golden, 4.16 km. north northwest of the GNIS location of Golden. Tom Schweich 2268. 9 May 2020. ( COLO2433761‡ EIU OBI149325‡ REGIS ) .
- Parfet Prehistoric Preserve, 4037. 5/12/2025. .
- Schweich Hill, Tom Schweich 1517. 3/27/2017. Top of hill. Colorado Noxious Weed List C. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1644. 30 May 2017. ( CDA0050032‡ CS KHD00065073‡ ) .
- South Table Mountain Open Space (City of Golden), 6046. 5/13/2026. .
- Stonebridge Homeowners Association, Southwest corner of Stonebridge HOA common areas, 4.33 km. south of the GNIS location of Golden. Tom Schweich 2954. 13 Jun 2023. ( Discarded. ) Tom Schweich, with Ann Norton 2275. 6/12/2021. .
- Welch Ditch, Also colleted here: Cynoglossum officinale, Scrophularia lanceolata, and Dactylis glomerata. Popular rock-climbing area with heavy daily use. Colorado Noxious Weed List C. Along the former Welch Ditch, in shade at the base of aqueduct walls, south side of Clear Creek, just inside the mouth of Clear Creek Canyon, 2.71 km. west southwest of the GNIS location of Golden. Tom Schweich 2310. 3 Jun 2020. ( CDA0053744‡ COLO2434520‡ JCOS s.n. ) .
- Welch Ditch (Open Space),
4720.
4/25/2026.
.
.
 Coll. No. 1112, Bromus tectorum |
Calamovilfa longifolia (Hook.) Scribn. in Hackel. Prairie Sandreed. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial grass, 1 m., thick scaly rhizomes; Nodes, hidden by sheath; Leaves, blade and sheath differentiated; Sheath, >75 mm., open, glabrous to long straight hairs distally; Ligule, hairs, 1.5 mm.; Auricles, absent; Blade, 350 mm. × 7 mm. wide, flat; Inflorescence, 1 per culm, panicle, 180 mm. × 15 mm. wide, 3-4 branches; Rachis, glabrous, not extended; Spikelets, many, 5.5 mm. × 2.5 mm. wide, borne singly, subtended by few long silky hairs; Compression, lateral. Disarticulation, above the glumes; Glumes, lower, 3.5 mm., keeled, veins, #1, upper, 5 mm., < lowest floret, veins, #1, keeled, awns, absent; Callus, straight silky hairs, 3 mm.; Lemma, 5 mm., >glumes, lanceolate, keeled, glabrous, scarious, veins, #1, forming a tiny awn tip, awns, absent; Palea, 4.8 mm., <lemma, colorless, glabrous; Stamens, #2; Anthers, 3.8 mm. (Described from Coll. No. 2397, 29 Jul 2020.)
- North Hogback Open Space (City of Golden),
Partially in the shade of some cottonwood trees, otherwise foothills grassland, also collected nearby: Alyssum simplex, Erodium cicutarium, Euphorbia esula, and Castilleja integra.
Northwesternmost Golden, at the south end of the North Hogback, on a small spoils pile of some sort, 4.07 km. north northwest of the GNIS location of Golden.
Tom Schweich 2397.
29 Jul 2020.
(
COLO2433878‡
KHD00074292‡
)
.
.
 Coll. No. 2397, Calamovilfa longifolia |
 Florets of Coll. No. 2397, Calamovilfa longifolia |
 Spikelets of Coll. No. 2397, Calamovilfa longifolia |
 Spikelets of Coll. No. 2397, Calamovilfa longifolia |
Dactylis glomerata L. Orchard Grass. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial grass, to 1.0-1.2 m.,
not rhizomatous,
basal or subterranean internodes not swollen;
Stem herbaceous;
Leaf,
Sheath open and closed observed, published descriptions are roughly equally divided as to whether the sheath is open or closed,
Ligule membraneous, 5 mm.;
Blade, differentiated from sheath, base not constricted, soft,
25 cm. × 0.7 cm. wide, not sharp-pointed;
Auricle, rounded, <1 mm., generally described as 0;
Infloresence exceeding leaves, 13 cm., panicle, well developed, erect, 1° branches open, branching 4° or 5°;
Spikelets not enclosed in a bur-like involucre,
not subtended by bristles or long silky hairs,
similar throughout plant,
all on one side of rachis,
crowded in dense clusters,
on 2°-4° panicle branches
1 per node,
axis few hairy,
some spikelets appear to be infertile;
Glumes, 2
< lowest floret,
lower, 3.5 mm, smaller and thinner than
upper, 6 mm.,
keeled,
glabrous to ciliate on keel, else sparsely hairy;
Florets
not modified into bulblets
4+ per spikelet ,
have feathery stigma-like material but no ovary (immature?),
uppermost vestigal floret not club-shaped rudiment (as seen in Melica);
Lemma
lowest largest, 5 mm., reduced above,
keeled, line of hairs on keel,
5 veins,
tip forked,
awn 1.0-1.5 mm.;
Palea
light green
with 2 veins
forked at tip.
Described from Collection No. 815, 9 May 2012, Alameda County, CA and
Coll. No. 1111, 26 May 2015, Jefferson County, CO.
- Coors Tech Wetland Open Space, 5991. 5/11/2026. .
- Deadman Gulch, Most culms long past maturity. Also collected here: Epilobium hirsutum, Solanum dulcamara, and Cirsium arvense. Near the junction of Deadman Gulch and Kinney Run, north side of creek, 2.28 km. south of the GNIS location of Golden Tom Schweich 2407.1 31 Jul 2020. ( COLO2433985‡ ) .
- Parfet Open Space (City of Golden), 4131. 6/1/2025. .
- Kinney Run, Tom Schweich 1625. 7/6/2018. .
- North Hogback Open Space (City of Golden), Tom Schweich 1750. 6/14/2019. .
- Schweich Hill, Tom Schweich 1529. 3/27/2017. .
- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2276. 6/12/2021. .
- Tripp Ranch Meadow Open Space, Tom Schweich 3589. 6/8/2024. .
- Welch Ditch, Also colleted here: Cynoglossum officinale, Scrophularia lanceolata, and Bromus tectorum. Not a listed Colorado noxious weed. Along the former Welch Ditch, at the base of aqueduct walls, south side of Clear Creek, just inside the mouth of Clear Creek Canyon, 2.69 km. west southwest of the GNIS location of Golden. Tom Schweich 2309. 3 Jun 2020. ( CDA0053743‡ EIU JCOS s.n. REGIS ) .
- Welch Ditch (Open Space),
4712.
4/25/2026.
.
.
Elymus canadensis L. Canadian Wildrye. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial grass, to 0.7-1.2 m., non-rhizomatous; Culm, cauline nodes hidden by sheath; Inflorescence, terminal spike, 20 cm. × 1.5 cm. wide, ±erect to curving to drooping; Rachis, mostly glabrous, internodes, 5 mm.; Spikelets, sessile, 2 per node, 15 mm. × 5 mm. wide (excluding awns), ascending; Glumes, #2, 21-25 mm., nearly subulate, flattened and slightly broadened above base, indistinct body 8-10 mm. × 1 mm. wide + awn 14-15 mm., veins 5?, entire, scabrous; Florets, #5, bisexual; Rachilla, short hairy; Callus, glabrous; Lemma, 10-13 mm., veins 5, rounded, hairy, awns, #1, 22-35 mm., curving when dry; Palea, 9.5 mm.; Stamens, #3, 4 mm. Described from Coll. Nos. 1237 and 1699.
- Magic Mountain Archeological Site, 4339. 7/30/2025. .
- North Hogback Open Space (City of Golden), Tom Schweich 1751. 6/14/2019. .
- Schweich Hill,
Tom Schweich 1671.
7/19/2018.
.
.
 Coll. No. 1699, Elymus canadensis |
 Coll. No. 1237, Elymus canadensis |
 Coll. No. 1237, Elymus canadensis |
Elymus elymoides (Raf.) Swezey. (Syn: E. longifolius (J. G. Sm.) Gould , Sitanion hystrix (Nutt.) J. G. Sm. ) Squirreltail Grass. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial grass to 50 cm., clumped; Inflorescence, bilateral spike; Rachis, internodes, 6.4 mm., breaking apart when mature; Spikelets, 2 per node; Glumes, #2, subulate, 62-65 mm.; Florets, #3, lowest 2 fertile, upper sterile; Lemma, 10 mm. + awn 50 mm., veins, #5, converging; Palea, 9 mm., 1 of 2 veins slightly extended as bristle. Variety brevifolius if infraspecific names are to be applied. Described from Coll. No. 1717, 28 July 2017.
- Eagle Ridge, On mesa slope in foothills. Transferred from USGS Herbarium, Denver, CO (2005). Foothills of the Front Range, at junction of US 6 and road to Morrison, about 1 mile east of Golden. Hansford T. Shacklette 5880. 27 Jun 1959. ( COLO529067‡ MICH1416150‡ ) .
- Grampsas North Open Space (City of Golden), 4285. 7/25/2025. .
- Schweich Hill, Tom Schweich 1752. 6/26/2019. .
- Stonebridge Homeowners Association,
Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2323.
7/24/2020.
Sovell, John R., and Susan S. Panjabi, 2021
.
.
 Coll. No. 1717, Elymus elymoides |
Elymus trachycaulus (Link) Gould ex Shinners. Slender Wheatgrass. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial grass, 75-100 cm., probably not rhizomatous, generally glabrous except as noted; Leaves, sheath, 130 mm., open, ligule, membraneous, auricles, small, 0-1 mm., blade, 25-200 mm. × 3.5 mm. wide, green, flat, scabrous; Inflorescence, 1 per culm, bi-lateral spike, 110 mm × 6 mm. wide; Rachis, internode 4.5 mm.; Spikelets, many, mostly 1 per node, about 1/3 have 2 per node, 17-21 mm. × 2.5-3.5 mm. wide, exclusive of awns, compression, weakly lateral; Disarticulation, between the florets; Glumes, #2, ±equal, lower, 11 mm. × 1.5 mm. wide + awns 2.0-2.5 mm., not quite straight, thick, tough, not keeled, veins, 5, prominent, margins, widest at middle, upper, 13 mm. × 1.8 mm. wide + awn 1.8 mm., veins, 7, >lowest floret; Florets, #4-8, lower bisexual, uppermost sterile; Callus, short straight white hairs; Lemma, rolled, 9-10 mm. + awn 3-22 mm., slightly curved, attached, end, longitudinally symetric, tip, bifid; Palea, 9 mm., <lemma, white except veins green and ciliate, tip, bifid, veins, ciliate; Anthers, 3 mm. or shriveled; Achene, 4 mm., green (Described from Coll. No. 1528, 5 August 2016, and Coll. No. 2647, 5 August 2022. See also #3309, 19 July 2024.)
- North Table Mountain Open Space (City of Golden),
Small wetland where the North Table Mountain Trail crosses a watercourse below a near-perennial spring that is higher on the south slope of the mesa.
Lower south slopes of North Table Mountain, above Peery Parkway, 250 m. south of the USBR monument “North Table,”1.25 km. north of the GNIS location of Golden.
Tom Schweich 1528.
5 Aug 2016.
(
EIU
JCOS s.n.
KHD00063436‡
)
.
.
Eriocoma hymenoides (Roem. & Schult.) Rydb. (Syn: Achnatherum hymenoides (Roem. & Schult.) Barkworth , Oryzopsis hymenoides (Roem. & Schult.) Ricker , Stipa hymenoides Roem. & Schult. ) Indian Rice Grass. CalPhotos. Jepson eFlora. SEINet Taxon.
- Kinney Run South, 3981. 1/3/2025. .
- Parfet Open Space (City of Golden), 4259. 7/16/2025. .
- Welch Ditch,
Tom Schweich 2156.
6/7/2021.
.
.
 Coll. No. 477, |
Eriocoma robusta (Vasey) Romasch. (Syn: Achnatherum robustum (Vasey) Barkworth , Stipa robusta (Vasey) Scribn. ) Sleepygrass. CalPhotos. Jepson eFlora. SEINet Taxon.
- Stonebridge Homeowners Association,
Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2319.
7/24/2020.
Sovell, John R., and Susan S. Panjabi, 2021
.
.
 Coll. No. 2683, |
 Coll. No. 1493, |
 Coll. No. 1740, |
Eriocoma scribneri (Vasey) Romasch. (Syn: Achnatherum scribneri (Vasey) Barkworth , Stipa scribneri Vasey ) CalPhotos. Jepson eFlora. SEINet Taxon.
- Kinney Run,
Under the overhang of sandstone cliff.
Coordinates estimated with GoogleEarth.
Along the cliffs on the east side of Kinney Run, south of Tripp Ranch, and north of Heritage Dells Park, 4.7 km. south of the GNIS location of Golden.
Tom Schweich, with Susan Panjabi and Zachariah Wilson 2418.
11 Aug 2020.
(
KHD00073941‡
)
.
.
 Coll. No. 2418, |
Festuca idahoensis Elmer. Idaho Fescue. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial, to 50 cm, distinctly tufted or clumped; Roots fibrous; Stem herbaceous; Internodes hollow; Leaf blade and sheath differentiated, soft; Sheath open; Ligule membraneous, 0.5 mm.; Blade narrow, rolled inward; Inflorescence 1-2, 8-9 cm., > leaves, branching evident, panicle, spikelets many; Spikelets similar, 1/node, 1° and 2° branches, many flowered, 10 mm.; Florets, 4-6 per spikelet, bisexual (1-2 staminate, 3-4 staminate and pistillate, 5-6 staminate and ?pistillate); Glumes lower 4.5 mm, upper 3.0 mm, lower < lowest floret, veins 3-9, awns 0; Axis sparsely hairy, not extended beyond upper floret; Lemma 5 mm., rolled, veins 5, outer faint, tip entire, awns 1, 2.0-2.5 mm, straight, attached at tip; Palea < lemma, keel glabrous, margin glabrous, Anthers 3, 2 mm.; Ovary glabrous (Described from Coll. No. 822, 30 May 2012. See also TAS #3343.).
- Schweich Hill,
Revegetated northeast corner of parcel, between social trail and neighborhood fencing.
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden.
Tom Schweich 1947.
15 Jun 2018.
(
COLO02348647‡
CS
JCOS s.n.
KHD00069367‡
)
.
.
Festuca ovina L. Complex, hybrid or selection. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space, 5988. 5/11/2026. .
- Cottonwood Natural Area, 3961. 12/27/2024. .
- Kinney Run South, 3969. 1/3/2025. .
- South Illinois Open Space, 3934. 12/20/2024. .
- Heritage Dells, South Gulch, 6120. 6/1/2026. .
- Parfet Prehistoric Preserve, 4034. 5/12/2025. .
- Stonebridge Homeowners Association, Tom Schweich 3271. 6/13/2023. F. idahoensis, F. saximontana, or a hybrib thereof. Tom Schweich, with Ann Norton 2277. 6/12/2021. .
- Tripp Ranch Meadow Open Space, 2767. 6/10/2022. . .
Festuca saximontana Rydb. (Syn: F. saximontana Rydb. var. purpusiana (St.-Yves) Fred. & Pavlick ) Rocky Mountain Fescue. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial, 30-60 cm., tufted; Rhizomes, 0; Culm, very sparse scabrous below inflorescence; Leaves, mostly basal, cauline leaves on flowering culms, Sheath, 75 mm., open, minutely scabrous; Ligule, membraneous, 0.2 mm., auricles, 0.5 mm., short hairy distally, Blade, 70 mm. × 1 mm. wide, rolled, minutely scabrous; Inflorescence, 1 per culm, >leaves, 50-115 mm. × 8-9 mm. wide, panicle, 2-3 branches, 2.5 mm.; Rachis, finely scabrous; Spikelets, many, similar, 9 mm. × 2-3.5 mm. wide, 1 per node; Compression, unremarkable; Disarticulation, between florets; Glumes, #2, pubescent only on distal veins and margins, lower, 2.5-3 mm., veins 1; upper, 3.5-4 mm., veins 3, tip mucronate, awns, #0, margins, entire; Florets, #4-6± per spikelet; Axis, few short hairs; Lemma, 4-4.5 mm., >glumes, lanceolate, membraneous, veins #5, obscure but best seen at base, awn, #1, 1.5-2.5 mm., straight, from tip of lemma; Palea, 4 mm., <lemma, glabrous veins green, tip bifid; Anthers, 1.5-2.0 mm. Described from Coll. No. 1667, 16 Jun 2017, and Coll. No. 1853, 18 May 2018.
- Schweich Hill,
Western edge of hill, adjacent to social trail.
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden.
Tom Schweich 1667.
16 Jun 2017.
(
KHD00065074‡
UCR ‡
)
Fine light-green perennial bunch grass beside trail, just east of crest of hill.
Not really native to Golden; probably a grass used in revegetation project.
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.74 km. north northeast of the GNIS location of Golden.
Tom Schweich 1850.
18 May 2018.
(
CAS
CDA0052353‡
COLO02347763‡
CS
)
Revegetation bunch grass.
Top of hill, beside social trail. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden.
Tom Schweich 1853.
18 May 2018.
(
JCOS s.n.
KHD00069368‡
)
.
.
 My collection of Festuca saximontana |
 Coll. No. 1667, Festuca saximontana |
 Inflorescence of Coll. No. 1667, Festuca saximontana |
Hesperostipa comata (Trin. & Rupr.) Barkworth. (Syn: Stipa comata Trin. & Rupr. ) Needle and Thread. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial, 50 cm., clumped, nonrhizomatous; Roots, fibrous; Stem, herbaceous; Leaves, blade and sheath differentiated; Sheath, 100-120 mm., open ≥½, glabrous; Ligule, membranous, length 3.7 mm., lacerate into 2 equal parts, auricles 0; Blade, 60 mm., involute, glabrous; Inflorescence, 1 per culm, >leaves, panicle, 200 mm. × 30 mm. wide; Rachis, not extended, somewhat scabrous throughout; Spikelets, many, similar, borne singly; Compression, unremarkable; Disarticulation, above the glumes; Glumes, lower, 23-34 mm., veins #3, upper, 23-29 mm., veins #5, awl-shaped, rounded, membranous, ±equal, tip, very narrow, not awned; Florets, 1 per spikelet; Callus, 4.5-50 mm., sharp, straight hairs 1.0-1.5 mm., color tan; Lemma, 9.5-10.0 mm., rolled, indurate, straight hairy 0.5 mm., color white-tan, veins #3(?), awns, #1, 125-160 mm., twisted and short straight hairy proximal 45 mm., bent, scabrous distally; Palea, 9 mm., ±lemma, few white hairs on mid-vein; Stamens, #3; Anthers, 6.5 mm. (Described from Coll. No. 1890, 28 May 2018).
- Parfet Open Space (City of Golden), 4161. 6/1/2025. 4260. 7/16/2025. 4261. 7/16/2025. .
- Kinney Run, Tom Schweich 1626. 7/6/2018. .
- Magic Mountain Archeological Site, 4336. 7/30/2025. .
- North Hogback Open Space (City of Golden), Tom Schweich 1710. 6/14/2019. Tom Schweich 1943. 6/12/2020. .
- North Table Mountain Open Space (City of Golden), Highest prairie mixed with foothill shrubs, also collected nearby: Aegilops cylindrica, Sphaeralcea coccinea, Linaria dalmatica, and Thinopyrum intermedium. Lower southwest slopes of North Table Mountain, along the lower portion of the City of Golden North Table Mountain trail, 1.9 km. north of the GNIS location of Golden. Tom Schweich 2051. 4 Jun 2019. ( CAS992107‡ CS198656‡ EIU UCR297669‡ ) .
- Parfet Prehistoric Preserve, 4043. 5/12/2025. .
- Schweich Hill, Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1944. 15 Jun 2018. ( KHD00069340‡ ) Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1945. 15 Jun 2018. ( COLO02347821‡ ) .
- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2278. 6/12/2021. .
- Tripp Ranch Meadow Open Space,
2785.
6/10/2022.
.
.
 Coll. No. 992, Stipa comata var. comata |
 Coll. No. 1929, Hesperostipa comata |
 Florets of Coll. No. 1890, Hesperostipa comata |
Koeleria macrantha (Ledeb.) Schult. Prairie Junegrass. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial bunch grass, to 45-55 cm., non-rhizomatous; Leaves, mostly basal or lowest cauline, cauline, sheath, 90 mm., open, ligule, <1-1.5 mm., membraneous, auricles, 0, blade, 40 mm., tip prow-shaped or merely constricted; Inflorescence, panicle, 60 mm. × 9 mm., shiny in anthesis due to exposure of translucent palae, short branches, branches short soft hairy; Spikelets, 5 mm., 1 per node on 1°-3° or indistinct panicle branches; Glumes, lower, 3 mm., veins 1, upper, 4 mm., veins 3; Florets, 3, #1 and #2 pistillate, #3 staminate, or variously mixed bisexual and pistillate, open, i.e., palea separated from lemma; Disarticulation, between florets; Rachilla hairy, extends nearly 1 mm. above upper floret (or not); extension undecorated; Lemma, 4.5 mm., veins 5, short hairy throughout, awn, 0-0.5 mm., short, soft; Palea, =lemma, translucent or colorless, exposed, i.e., outside lemma.; Stamens, 3, 1.8 mm. Described from Coll. No. 1131, 9 June 2015, and Coll. No. 1144, 15 Jun 2015.
- Grampsas North Open Space (City of Golden), 3925. 12/7/2024. .
- Parfet Open Space (City of Golden), 4103. 6/1/2025. .
- Heritage Dells, South Gulch, 6138. 6/1/2026. .
- North Hogback Open Space (City of Golden), Tom Schweich 1736. 6/14/2019. Open herbaceous vegetation, ponderosa pines and mountain mahogany shrubland nearby. Also collected here: Heterotheca villosa, Hesperostipa comata, and Eriogonum umbellatum var. umbellatum. Hogback at the northern city limits of Golden, dry and more or less flat area on top of ridge, 4.38 km. north northwest of the GNIS location of Golden. Tom Schweich 2357.1 12 Jun 2020. ( CS198713‡ EIU ) .
- Schweich Hill, Tom Schweich, with Margaret Henderson and Nancy von Burske 1932. 6/6/2020. .
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2324. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 Tom Schweich, with Ann Norton 2279. 6/12/2021. .
- Tripp Ranch Meadow Open Space, 2750. 6/10/2022. .
- Welch Ditch,
Popular rock-climbing area with heavy daily use.
Along the former Welch Ditch, south side of Clear Creek, growing in rocks and concrete on the edge of the ditch, just inside the mouth of Clear Creek Canyon, 2.55 km. west southwest of the GNIS location of Golden.
Tom Schweich 2314.
3 Jun 2020.
(
COLO2434496‡
JCOS s.n.
)
.
.
 Coll. No. 1131, Koeleria macrantha |
 Coll. No. 1117, Koeleria macrantha |
 Coll. No. 1131, Koeleria macrantha |
 Inflorescence of Coll. No. 1419, Koeleria macrantha |
Muhlenbergia andina (Nutt.) Hitchc. Foxtail Muhly. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial grass, to 70 cm.; Rhizomes, robust, scaly; Internodes glabrous, except retrorsely hairy just below nodes to lowest part of sheath above; Leaves, sheath, open, 60 mm., ligules, 1 mm., membraneous, auricles, absent, blade, 100 mm. × 2.3 mm. wide, tapered to an acute tip, margin and mid-rib slightly scabrous; Inflorescence, 1 per culm, dense interrupted panicle, “appearing furry” per Wingate (1994); Spikelets, with 1 well developed floret; Glumes, lower, 3.5 mm., upper, 3.2 mm., veins, #1, but otherwise glumes very thin; Callus, silky hairs to 2 mm.; Lemma, 2.5 mm., very thin, except 3 green veins, awn, #1, from entire apex, 7.5 mm, straight to wavy; Palea, 1.7 mm. (Described from Coll. No. 2392, 24 Jul 2020).
- Grant Terry Open Space,
Also seen here: Dichanthelium sp., probably D. oligosanthes.
Near the north bank of Clear Creek, on the edge of a now dry distributary channel, approximately 100 m. west of US Highway 6, 1.75 km. west of the GNIS location of Golden
Tom Schweich, with Jessica Smith, Susan Panjabi, and Zachariah Wilson 2392.
24 Jul 2020.
(
COLO2433852‡
KHD00074291‡
)
.
.
 Coll. No. 2392, Muhlenbergia andina. |
 Rhizome of Coll. No. 2392, Muhlenbergia andina. |
 Detail of inflorescence of Coll. No. 2392, Muhlenbergia andina. |
Muhlenbergia montana (Nutt.) Hitchc. Mountain Muhly. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial grass, to 50 cm., caespitose; Leaves, sheath, open, ligule, membraneous, 4.5 mm., auricles, 0, blade, 110 mm. × 1 mm. wide; Inflorescence, rather sparse contracted panicle, 120 mm.; Florets per spikelet, #1; Glumes, #2, papery, toothed, lower, 1.5 mm., upper, 2 mm., teeth 3; Lemma, 3 mm. + awn 13 mm., flexuous, tuft of hairs at base; Palea, 2.8 mm. Described from Coll. No. 1282, 28 Aug 2015.
- North Hogback Open Space (City of Golden),
Mixed foothill shrubland, also collected nearby: Delphinium carolinianum var. virescens, Andropogon gerardii, and Schizachyrium scoparium.
Northwesternmost city limits of Golden, west side of Dakota Ridge (North Hogback), near the top of ridge, 2.67 km. north northwest of the GNIS location of Golden.
Tom Schweich 2404.
29 Jul 2020.
(
CAS
CDA0053769‡
COLO2433969‡
)
.
.
 Coll. No. 1282, Muhlenbergia montana |
 Inflorescence of Coll. No. 1282, Muhlenbergia montana |
Nassella viridula (Trin.) Barkworth. (Syn: Stipa viridula Trin. ) Green Needlegrass. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial grass, 70-100 cm., clumped, non-rhizomatous; Stem, herbaceous; Leaves, cauline, sheath, 17 mm., ligule, 3 mm., membraneous, collar with few hairs at sides, blade, to 30 cm., convolute; Inflorescence, 1 per culm, panicle, 20-25 cm.; Rachis, lightly scabrous, not extended beyond upper spikelet; Compression, unremarkable; Spikelets, 1 per node; Florets, 1 per spikelet, bisexual; Glumes, 2, 8-9 mm., ±equal, rounded, membraneous, colorless, exc. 3 green veins, tip, short (2 mm.) hair-like awn; Disarticulation, above the glumes, Florets, 1 per spikelet; Callus, short; Lemma, 5-6 mm. × 1.2 mm. wide, <glumes, green, hairy, <1 mm., indurate, enclosing grain, awns, #1, 20-25 mm., twisted, bent, short hairy (±0.2 mm.); Palea, 1.5-2.0 mm., <lemma, membraneous, glabrous; Stamens, #3. Described from Colls. No. 1146, 1652, and 1698.
- Eagle Ridge, On mesa slope in foothills. Foothills of the Front Range, at junction of US 6 and road to Morrison, about 1 mile east of Golden. Hansford T. Shacklette 5878. 27 Jun 1959. ( COLO529082‡ ) .
- Eagle Ridge, Tract A, Common in this field, drier patch dominated by Artemisia ludoviciana, stiff clay soil. City-owned parcel north of “Eagle Ridge” between CSM Survey Field and US Highway 6, about 70 m. northwest of the Kinney Run Trail, 2.37 km. (geodesic) south of the GNIS location of Golden. Tom Schweich 2979. 19 Jun 2023. ( Golden ) .
- Grampsas North Open Space (City of Golden), 4292. 7/25/2025. .
- Parfet Open Space (City of Golden), 4253. 7/16/2025. .
- Kinney Run, Tom Schweich 1630. 7/6/2018. .
- North Hogback Open Space (City of Golden), Tom Schweich 1711. 6/14/2019. Tom Schweich 1940. 6/12/2020. .
- North Table Mountain Open Space (City of Golden), 4209. 6/23/2025. .
- Schweich Hill, East-central portion of the parcel where native vegetation begins to give way to smooth brome. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 2.27 km. northwest of the GNIS location of Golden. Tom Schweich 2091. 26 Jun 2019. ( KHD00070779‡ OBI ‡ REGIS ) .
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2325. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 Tom Schweich, with Ann Norton 2280. 6/12/2021. .
- Tripp Ranch Meadow Open Space,
Tom Schweich 3591.
6/8/2024.
.
.
 Inflorescence of Coll. No. 1146, Nassella viridula |
 Inflorescence of Coll. No. 1146, Nassella viridula |
 Inflorescence of Coll. No. 1652, Nassella viridula |
Pascopyrum smithii (Rydb.) Á. Löve. (Syn: Agropyron smithii Rydb. ) Western Wheatgrass. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial grass, to 75 cm., rhizomes, not seen; Leaves, ligule, short membraneous, auricles, 0, blade revolute; Inflorescence, bilateral spike; Rachis, internodes 6 mm.; Spikelets, 17 mm. × 10 mm. wide × 2 mm., not in capitate clusters, 1 per node, not oriented edgewise to rachis; Glumes, < lowest floret, narrowly lanceolate, slightly asymmetric, lower, 9.5 mm., upper, 10.6 mm.; Florets, #6±; Lemma, 11 mm., awns, 0; Palea, 9 mm.; Anthers, 4.5 mm. Described from Coll. No. 1691, 28 Jun 2017.
- Stonebridge Homeowners Association,
Tom Schweich 3302.
6/21/2023.
.
.
 Coll. No. 1691, Pascopyrum smithii |
 Coll. No. 3098, |
 Inflorescence of Coll. No. 1691, Pascopyrum smithii |
Phleum pratense L. Timothy. CalPhotos. Jepson eFlora. SEINet Taxon.
- Cressmans Gulch, 4538. 4/15/2026. .
- Stonebridge Homeowners Association,
Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2327.
7/24/2020.
Sovell, John R., and Susan S. Panjabi, 2021
.
.
 Collection No. 501 |
 Coll. No. 1216, Phleum pratense |
 So, are there short awns? And what's with the truncate(?) glumes? |
 Collection No. 501, Phleum pratense L. Timothy. |
Poa bulbosa L. Bulbous Bluegrass. Weed: CO DofA, List: C. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Prehistoric Preserve, 4033. 5/12/2025. .
- Stonebridge Homeowners Association, Tom Schweich 3270. 6/13/2023. .
- Tucker Gulch (lower),
Along the Tucker Gulch trail, 70 m. north of the First Street bridge, 1.4 km north northwest of the GNIS location of Golden.
Tom Schweich 1114.
26 May 2015.
(
CAS
KHD56953‡
OBI82129‡
UC
UCR265988‡
)
.
.
 Coll. No. 1114, Poa bulbosa, bulbus bases of culms. |
 Florets of Coll. No. 1114, Poa bulbosa. |
 Inflorescence of Coll. No. 1114, Poa bulbosa. |
Poa compressa L. Canada Bluegrass. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial, 35-80 cm.; Root fibrous; Rhizomes not seen to numerous; Culms, compressed; Nodes, compressed; Leaf blade and sheath differentiated, soft; Sheath 40-55 mm., open top ¾ to full length; Blade, 40-55 mm., folded; Ligule membraneous, 1-4 mm.; Inflorescence 1 per culm, panicle, contracted, > leaves, 45 mm. × 12 mm. wide, spikelets many; Compression, lateral; Disarticulation, above the glumes, between the florets; Spikelets, similar, 1 per node, 1°-3° branches, 4 mm. × 1.5 mm. wide, bisexual; Florets per spikelet 3-5; Glumes #2, lower, 2(3) mm., veins #3, upper, 2.2(3) mm., < lowest floret; Callous glabrous; Lemma, 2 mm., keeled, few hairs near base, veins, 5 neither equally spaced nor prominent (much easier to see if you soften the lemmas with Pohl's solution!), tip, obtuse, awns 0; Palea, 2 mm., veins, green, sparsely scabrous; Anthers, #3, 1.6 mm.; Ovary glabrous. Described from Coll. No 861, 1231, and 1677.
- North Hogback Open Space (City of Golden), Damp soil, just below storm drain outfall, with Bouteloua gracilis and Bromus japonicus. This parcel designated the North Golden Hogback Open Space in July 2025. In the bottom of the dry wash (Cressman Gulch) that runs along the southwest side of the open space, 3.27 km. northwest of the GNIS location of Golden. Tom Schweich 3454. 20 Jul 2025. ( FLD OBI UCR ) .
- Stonebridge Homeowners Association,
Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2328.
7/24/2020.
Sovell, John R., and Susan S. Panjabi, 2021
.
.
 Habitat of Coll. No. 1231, Poa compressa |
 Coll. No. 1677, Poa compressa |
 Coll. No. 3454, Poa compressa. |
 Coll. No. 861, Poa compressa |
Poa palustris L. Fowl Bluegrass. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial grass, to 1 m., growing in running water; rhizomes, unknown (none seen); Leaves, sheath open, ligule, membraneous, 4 mm., blade, flat, scabrous, tip, narrow, not broadly prow-shaped; Inflorescence, open panicle, 28 cm. × 20 cm. wide, lower branches 4-5 per node; Pedicels, 0.3-3.0 mm.; Spikelets, 1 per node, 4 mm. × 1 mm., compression lateral, glumes, lemma, and paleae very fragile; Glumes, #2, lower, 2.6 mm., veins 3, upper, 2.8 mm., veins 3 (5?); Disarticulation, above the glumes; Florets, 3 fertile, + uppermost rudimentary; Lemma, 2.6 mm., veins, at least 3, maybe 5, basal hairs sparse, but length 1/2 the lemma, keeled, hairy proximally, margin, hairy proximally, glabrous between the veins; Palea, 2.3 mm. (Described from Coll. No. 1529, 5 August 2016.)
- North Table Mountain Open Space (City of Golden),
Small wetland where the North Table Mountain Trail crosses a watercourse below a near-perennial spring that is higher on the south slope of the mesa.
Lower south slopes of North Table Mountain, above Peery Parkway, 250 m. south of the USBR monument “North Table,”1.25 km. north of the GNIS location of Golden.
Tom Schweich 1529.
5 Aug 2016.
(
JCOS s.n.
KHD00068389‡
)
Small wetland where the North Table Mountain Trail crosses a watercourse below a near-perennial spring that is higher on the south slope of the mesa.
Same as Coll. No. 1529, but this one shows the decumbent culms that are purplish at the base.
Lower south slopes of North Table Mountain, above Peery Parkway, 250 m. south of the USBR monument “North Table,”1.25 km. north of the GNIS location of Golden.
Tom Schweich 1530.
5 Aug 2016.
(
JCOS s.n.
KHD00063444‡
)
.
.
 Coll. No. 1529, Poa palustris |
 Spikelets of Coll. No. 1529, Poa palustris |
Poa pratensis L. (Syn: P. agassizensis B. Boivin & D. Löve ) Kentucky Bluegrass. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial grass, to 40-75 cm.; Roots fibrous; Rhizomes slender, light-colored, 0.8-1.0 mm. dia., to 12 cm.; Culm, not bulbous at base, not strongly flattened; Nodes; Leaf blades and sheath differentiated, soft, Sheath, 85-130 mm., open at least ½; Auricles 0; Ligules membraneous, ≤1 to 1.8 mm.; Blade, lower involute or folded, upper flat, 25-75 mm. × 3 mm. wide, margin, scabrous, tip ±prow-shaped (or not); Inflorescence 1 per culm, terminal, panicle, 70-130 mm. × 33-65 mm. wide, pyramidal, branches scabrous; Rachis, not extended, glabrous; Spikelets, 4-5 mm. × 2.5 mm. wide, similar throughout plant, singly pedicelled on 2°-5° branches, pedicels 0.5-2.0 mm., with both pistillate and staminate florets; Compression lateral; Disarticulation above the glumes; Glumes, keeled, keels, glabrous, scabrous, or with small line of stiff hairs distally, lower, 2.0-2.8 mm., <lowest lemma, veins 1 or 3, upper, 2.5-3.0 mm., veins 3; Florets, #(2)3-4 per spikelet (eliminates Agrostis), mostly bisexual; Rachilla, extends 1 mm. above upper floret, not hairy; Callus long cobwebby hairs (distinctive!), or with some cobwebby hairs, but cobwebby hairs also elsewhere; Lemma 2.7-3.0 mm., >glumes, glabrous, veins 3-5, likely 5 as the 2 outer veins that are visible are quite near margins, short hairy on keel and margins cobwebby proximally, margins scarious, tip broadly acute, Awns 0; Palea 2.3-3 mm., ≤lemma, membraneous, green, esp. on veins, keel scabrous, intercostal regions narrow and glabrous; Anthers #3, 1-1.6 mm., purple (streaked); Stigma feathery, white. Described from Coll. Nos. 470 & 860, Mono County, CA, and Coll. Nos. 1118, 1420 & 1889, 2057, Jefferson County, CO. Subspecies of P. pratensis are not recognized in Colorado (Weber&Wittmann 2012, Ackerman 2015).
- North Hogback Open Space (City of Golden), Also collected here: Secale cereale, Linum lewisii, and Lupinus argenteus. Northwesternmost Golden, between Pine Ridge Road and Dakota Ridge, on a terrace above Cressmans Gulch, 4.50 km. north northwest of the GNIS location of Golden. Tom Schweich 2351. 12 Jun 2020. ( CAS COLO2433621‡ UC ) .
- North Table Mountain Open Space (City of Golden), Small grassy areas on the upper southwest slope of North Table Mountain, hummocky terrain, probably in the head of one or more landslides, 1.96 km. north of the GNIS location of Golden. Tom Schweich 2057. 4 Jun 2019. ( REGIS UCR ) .
- Schweich Hill,
Likely planted here as part of a revegetation project.
Top of hill, beside social trail. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden.
Tom Schweich 1854.
18 May 2018.
(
COLO02347813‡
EIU
OBI158377‡
)
.
.
 Coll. No. 2057, Poa pratensis |
 Coll. No. 3019, Poa pratensis. |
 Inflorescence of Coll. No. 1420, Poa pratensis |
 Roots of Coll. No. 1420, Poa pratensis |
Poa secunda J. Presl. (Syn: P. nevadensis Vasey ex Scribn. ) Sandberg Bluegrass.. CalPhotos. Jepson eFlora. SEINet Taxon.
- Schweich Hill,
Subsp. secunda if infraspecific names are to be applied.
Top of hill, near social trail. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden.
Tom Schweich 1855.
18 May 2018.
(
CAS
JCOS s.n.
KHD00069170‡
UC
UCR ‡
)
.
.
 Coll. No. 1855, Poa secunda ssp. secunda |
Schedonnardus paniculatus (Nutt.) Trel. (=Muhlenbergia paniculata (Nutt.) R. M. Peterson) Tumblegrass. CalPhotos. Jepson eFlora. SEINet Taxon.
- Eagle Ridge, On mesa slope in foothills. Transferred from USGS Herbarium, Denver, CO (2005). Foothills of Front Range, at junction of US 6 and road to Morrison, about 1 mile east of Golden. Hansford T. Shacklette 5879. 27 Jun 1959. ( COLO529077‡ ) . .
Schizachyrium scoparium (Michx.) Nash. Little Bluestem. CalPhotos. Jepson eFlora. SEINet Taxon.
- Parfet Open Space (City of Golden), 4254. 7/16/2025. .
- North Hogback Open Space (City of Golden), in rock outcrops along top of ridge Tom Schweich 1983. 7/29/2020. .
- Parfet Prehistoric Preserve, 4061. 5/12/2025. .
- Schweich Hill,
Determination tentative.
Tom Schweich 1532.
3/27/2017.
.
.
 Schizachyrium scoparium (Little Blue Stem) in the Mines Survey Field. |
 Coll. No. 1735, Schizachyrium scoparium |
 Coll. No. 1262, Schizachyrium scoparium |
 Coll. No. 1262, Schizachyrium scoparium |
Secale cereale L. Cereal Rye. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual, erect, 75-100 cm., not rhizomatous; Roots, fibrous; Stem, herbaceous; Nodes, constricted, purple; Leaf, sheath, 115 mm., open, ligule, minimal, membraneous, auricle, 0.6-1.0 mm., blade, 170 mm. × 5 mm. wide, flat, minutely scabrous; Inflorescence, 1 per culm, terminal 2-sided spike, 100-110 mm. × 9 mm. wide; Rachis, nodes 2.0-3.5 mm., bilateral tufts of straight hairs; Spikelets, many, 1 per node, sessile, bases not embedded in rachis; Disarticulation, below the glumes; Glumes, 2, awl-like, 8-9 mm., ±equal, <lowest floret, keeled, purplish distally, appearing to hide the rachis but not the lemmas; Florets 2, appear side-to-side, fertile; Lemma, 12-13 mm., asymmetric in x-section, veins, 5, keeled, keel ciliate, margins, one ciliate, the other less so, awned; Awns, attached end, 11-16 mm., short proximally in the inflorescence, lengthening distally, straight to wavy, some slightly twisted; Palea, 11-12 mm, membraneous (Described from Coll. No. 1110 and 2350).
- North Hogback Open Space (City of Golden),
Also collected here: Poa pratensis, Linum lewisii, and Lupinus argenteus.
Northwesternmost Golden, between Pine Ridge Road and Dakota Ridge, on a terrace above Cressmans Gulch, 4.50 km. north northwest of the GNIS location of Golden.
Tom Schweich 2350.
12 Jun 2020.
(
CDA0053750‡
COLO2434397‡
OBI149320‡
)
.
.
 Coll. No. 1110, Secale cereale, auricles ±1 mm. |
 Coll. No. 1110, Secale cereale |
 Spikelets of Coll. No. 2350, Secale cereale |
Sorghastrum nutans (L.) Nash. Yellow Indian Grass. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial warm season grass, to 1.2 m.; Inflorescence, panicle, 12 cm., color distinct yellowish; Spikelets, paired (theoretically), sessile spikelet present, pedicellate spikelet absent leaving a hairy pedicel; Compression, ±dorsal (upper glume flattened); Glumes, 6 mm., ±equal, veins 7 prominent green, upper glabrous, lower hairy; Florets, 2 per spikelet, lower floret reduced and sterile, upper floret perfect; Lemma, 4.5 mm., membraneous, apex bifid and awned, awn, 12 mm., twisted, bent once; Palea, reduced or missing; Stamens, 3, 4 mm., yellow; Stigmas, 2, feathery, pink (turning brown?). (Described from Coll. No. 1249, 26 Jul 2015).
- Cottonwood Natural Area,
3950.
12/27/2024.
.
.
Sporobolus cryptandrus (Torr.) A. Gray. (Syn: Agrostis cryptandra Torr. ) Sand Drop-seed. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial grass, to 50 cm., caespitose; Leaves, cauline, sheath, 45 mm., overlapping about ½, open, ciliate distally; ligule, hairy, 0.5 mm., collar of hairs to 3 mm., blade, 150 mm. × 3.5 mm. wide, rolled to flat; Inflorescence, open panicle, 120 mm, × 45 mm. wide, lower branches included in sheath; Spikelets, 2 mm. × 0.5 mm. wide, crowded on panicle branches, glabrous throughout; Florets, 1 per spikelet, bisexual; Glumes, #2, awns 0, lower, 0.7 mm., upper, 1.8 mm.; Lemma, 2.0 mm., veins, 1, prominent green, awns, 0; Palea, 1.9 mm. Described from Coll. No. 1757, 31 Aug 2017.
- North Table Mountain Open Space (City of Golden), Mostly grassland with a few shrubs, also collected nearby: Corydalis aurea, Securigera varia, and Erigeron tracyi. Lower south slopes of North Table Mountain, beside the access road to the overflow (upper) parking lot for the Golden Cliffs climbing area, 1.57 km. northeast of the GNIS location of Golden Tom Schweich, with Cindy Trujillo 2512. 18 Jun 2021. ( KHD00075350‡ ) .
- Schweich Hill,
Top of hill, adjacent to social trail.
Native to Colorado, but also commonly used in revegetation projects.
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden.
Tom Schweich 1757.
31 Aug 2017.
(
KHD00065162‡
UCR ‡
)
.
.
Thinopyrum intermedium (Host) Barkworth & D.R. Dewey. (Syn: Elytrigia intermedia (Host) Nevski , Elymus hispidus (Opiz) Melderis ) Intermediate Wheatgrass. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial grass, to >1 m., rhizomatous; Leaves, sheath, open, 19 cm., outer margin ciliate proximally, ligules, membraneous, 1 mm., auricles, 0, blade, 24 cm., involute; Inflorescence, 2-sided spike; Spikelets, 1 per node, sessile, ascending; Glumes, ±equal, 7.5-8.0 mm., stiff, veins 5, tip offset mucronate, awn 0, sparsely hairy on veins and margins; Florets per spikelet, 6; Lemma, 9 mm., stiff, veins 5, tip rudimentary awn; Palea, 8.5 mm., robust, fused to grain. Described from Coll. No. 1272, 20 July 2015.
- Deadman Gulch, Foothills grassland north side of creek; foothills shrubland south side of creek; Also collected here: Solanum dulcamara, Epilobium ciliatum, E. hisutum, Cirsium arvense, and Dactylis glomerata. Near the junction of Deadman Gulch and Kinney Run, north bank of creek, 2.27 km. south of the GNIS location of Golden Tom Schweich 2408. 31 Jul 2020. ( COLO2434009‡ CS OBI186049‡ REGIS ) .
- North Table Mountain Open Space (City of Golden), Flat area with rock outcrops, probably the headscarp of a small landslide. Southwest slopes of North Table Mountain, 1.34 km north of the GNIS location of Golden Tom Schweich 1272. 30 Jul 2015. ( CAS KHD56537‡ UC UCR267475‡ ) .
- Schweich Hill, Determination tentative Tom Schweich 1499. 3/27/2017. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue. North central part of parcel, just off the top of the hill. Tom Schweich 1709. 14 Jul 2017. ( EIU029913‡ KHD00065154‡ ) .
- Stonebridge Homeowners Association,
Tom Schweich, with Ann Norton 2281.
6/12/2021.
.
.
 Habitat of Coll. No. 1272, Thinopyrum intermedium |
 Coll. No. 1709, Thinopyrum intermedium |
 Coll. No. 2552, Thinopyrum intermedium |
 Ciliate sheath margin of Coll. No. 2552, Thinopyrum intermedium |
Triticum aestivum L. Wheat. CalPhotos. Jepson eFlora. SEINet Taxon.
- Schweich Hill,
Extreme southeastern corner of open space, probably a contaminant in grass seed used for revegetation following construction of condominiums at 410-416 N. Ford St.
Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 2.20 km. northwest of the GNIS location of Golden.
Tom Schweich 2089.
26 Jun 2019.
(
CDA0052294‡
JCOS s.n.
KHD00070735‡
REGIS
)
.
.
 Coll. No. 2089, Triticum aestivum |
 Inflorescence of Coll. No. 2089, Triticum aestivum |
Vulpia octoflora (Walt.) Rydb. (Syn: Festuca octoflora Walter , Vulpia octoflora (Walt.) Rydb. var. octoflora ) Six Weeks Fescue. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual, 5-6 cm., tufted; Roots, fibrous; Sheath, 6 mm., open, minutely hairy; Ligule, membraneous, very short; Blade, 4.5 mm. × 0.3 mm. wide, rolled, glabrous; Inflorescence, 1 per culm, >leaves, raceme, 16 mm. × 5 mm. wide; Spikelets, #6, 6-7 mm., similar, 1 / node, many flowered; Compression, lateral; Disarticulation, between florets; Glumes, lower, 2 mm., vein, #1, upper, 3 mm., veins, #3, keeled, awns, #0; Florets, #5-6 per spikelets; Axis, short hairy abaxially; Lemma, 3.2 mm, >glumes, lanceolate, green, rolled, hairs, 0.2 mm., white/straw color, veins, #3, glabrous, tip entire, awns, #1, 1.8 mm., straight, attached to end; Palea, 2.7 mm., <lemma, membraneous, margin ciliate; keeled (Described from Coll. No. 1852, 18 May 2018).
- Schweich Hill,
Top of hill, beside social trail. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden.
Tom Schweich 1852.
18 May 2018.
(
KHD00068998‡
)
.
 Coll. No. 1852, Vulpia octoflora |
 Coll. No. 1852, A little annual Vulpia octoflora |
Smilacaceae
Smilax lasioneura Hook. Fl. Bor.-Amer. 2: 173 [as lasioneuron]. Blue Ridge Carrionflower. CalPhotos. Jepson eFlora. SEINet Taxon.
- Grant Terry Open Space, Pistillate plant. 6233. 6233. .
- Kinney Run,
with Susan Panjabi, Jessica Smith, and Zac Wilson.
Tom Schweich 1981.
7/24/2020.
.
Typhaceae
Typha latifolia L. Cattail. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space, 5962. 5/11/2026. .
- Kinney Run, wet ground, small spring or seep. Tom Schweich 1987. 7/31/2020. .
- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2342. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 .
| Total number of taxa: | 441 |
| Native Taxa: (serif, italic, bold) | 274 |
| Exotic Taxa: (sans-serif, italic) | 135 |
| Nativity Undetermined: (default font, italic) | 32 |
| Listed Weeds: Identified as Weed | 35 |
Notes:
† -- Data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/consortium/).
‡ -- Southwest Environmental Information Network, SEINet. 2009-2014. http//:swbiodiversity.org/seinet/index.php. Accessed from July 2009 to September 2014.
Locations Included in This Area
Sovell, John R., and Susan S. Panjabi. 2021. Biological Survey of Golden Open Space Property, Jefferson County, Colorado. Fort Collins, CO: Colorado Natural Heritage Program, Colorado State University, 2021.
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Date and time this article was prepared: 8/1/2026 3:21:15 PM.
