TAS Collections Arranged by Name

Marchantiophyta
2073, Lippincott Ranch. Jointly owned by City of Boulder OSMP and Jefferson County Open Space, northern portion of property, sunny site on the south bank of Bull Gulch, 22.9 km. north northwest of the GNIS location of Golden. Deferred, to match with Coll. No. 2171. 6 Jun 2019. (GoldenComb. w/ 2171).
2171, Lippincott Ranch. Jointly owned by City of Boulder OSMP and Jefferson County Open Space, northern portion of property, 22.9 km. north northwest of the GNIS location of Golden. Sunny site on the south bank of Bull Gulch, running water at base of large boulder. 21 Jul 2019. (Golden).

Bryophyta

Bryophyte . 
2014, North Washington Open Space. 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. Deferred. 16 Apr 2019. (KHD ^‡).
3052, Morrison Creek. upper Morrison Creek, in the creek bed 10 Jul 2023. (Undist).

Aspleniaceae

Asplenium septentrionale (L.) Hoffm.  Forked Spleenwort.
2671.1, Bull Gulch. Lippincott Ranch, crossed west to east by Bull Gulch, north side of gulch, 473 m. west from the eastern boundary, 1.53 km. north northwest of the main gate, and 23.1 km. north northwest of the GNIS location of Golden. Rock outcrop on north side of gulch. Lippincott Ranch is jointly owned by City of Boulder Open Space and Mountain Parks and Jefferson County Open Space. 7 Aug 2021. (KHD75617^‡, OBI183406^‡).

Dennstaedtiaceae

Pteridium aquilinum (L.) Kuhn var. pubescens Underw.  Hairy Bracken Fern.
2746, Lippincott Ranch. Along the western parcel boundary below the Union Pacific railroad, north of the power line and south of Bull Gulch, 1.10 km. northwest of the main gate, 22.6 km. north northwest of the GNIS location of Golden. Sunny southeast-facing slope. Lippincott Ranch is jointly owned by City of Boulder Open Space and Mountain Parks and Jefferson County Open Space. 7 Sep 2021. (CIBO, JCOSs.n., KHD76204^‡, OBI183780^‡).

Dryopteridaceae

Cystopteris fragilis (L.) Bernh.  Brittle Bladderfern.
1447.1, North Table Mountain Park. Rim of mesa, head of unnamed canyon draining southeast to Clear Creek, 1.8 km. north northeast of the GNIS location of Golden. East-facing rock crevices. 22 Jun 2016. (JCOS s.n.).
2498, Lippincott Ranch. Southwest corner of the ranch, bottom of a small gulch, below the railroad embankment, 22.4 km. north northwest of the GNIS location of Golden. Deep ponderosa pine forest growing from bases of rocks. Jointly owned by City of Boulder Open Space and Mountain Parks and Jefferson County Open Space. 4 Jun 2021. (Golden).
2890, Brumley. About ½ mile north of Brumley on the east side of the highway, about 12 road miles on Colorado Highway 82 generally west from Twin Lakes, Lake County, Colorado; 175 km. southwest of Golden. About 140 m. above the highway in a rock pile of hummocky terrain (avalanche chute?) with a few small willows. 20 Jul 2022. (CS201808^‡, KHD79752^‡, OBI183829^‡, UCR300274^‡).

Dryopteris filix-mas (L.) Schott.  Male Fern.
2507.1, Bull Gulch. In Lippincott Ranch, in stream channel adjacent to sand/gravel/cobble bar, just upstream of the ranch road crossing of Bull Gulch, 23.0 km. north northwest of the GNIS location of Golden Many collections here, such as: Juncus ensifolius, Populus deltoides, Melilotus albus, Trifolium fragiferum, Ribes inerme, Chamerion angustifolium, Epilobium brachycarpum, and Anaphalis margaritacea. Jointly owned by City of Boulder Open Space and Mountain Parks and Jefferson County Open Space. 4 Jun 2021. (KHD75585^‡).
2671, Bull Gulch. Lippincott Ranch, crossed west to east by Bull Gulch, north side of gulch, 434 m. west from the eastern boundary, 1.49 km. north northwest of the main gate, and 23.1 km. north northwest of the GNIS location of Golden. At the base of a boulder, high on the south bank of the gulch. Lippincott Ranch is jointly owned by City of Boulder Open Space and Mountain Parks and Jefferson County Open Space. 7 Aug 2021. (KHD75665^‡).
2826.1, Lippincott Ranch (North). Northern portion of the ranch in Boulder County, very close to the western parcel boundary, base of boulders above south fork of Spring Creek, 2.33 km. north northwest of the main gate, 2.67 km. south southwest of the GNIS location of Eldorado Springs. Ponderosa pine forest, also collected here: Jamesia americana, Heuchera bracteata, Urtica dioica, and Elymus glaucus. 2 Jul 2022. (Golden, KHD78902^‡).

Woodsia . 
19, Lobo Point. Rare, in shaded rock crevices on north slopes. . (UC(TAS)).

Woodsia oregana D.C. Eaton ssp. cathcartiana (B.L. Rob.) Windham.  Rocky Mountain Woodsia.
1343, North Table Mountain Park. Southeastern portion of North Table Mountain, near the North Table Loop, where it passes through the top basalt rim of the mountain, 1.8 km. north northeast of the GNIS location of Golden. Under an east-facing rock overhang. 12 May 2016. (JCOS s.n., KHD00063429^‡).
1447, North Table Mountain Park. Rim of mesa, head of unnamed canyon draining southeast to Clear Creek, 1.8 km. north northeast of the GNIS location of Golden. East-facing rock crevices. 22 Jun 2016.
1734, North Table Mountain Park. Western slope of North Table Mountain, in boulders of the break in slope formed by the lowest basalt flow embedded in the Denver Formation, 3.1 km. north of the GNIS location of Golden. 15 Aug 2017. (KHD00065322^‡).
2019, Lippincott Ranch. Jointly owned by City of Boulder OSMP and Jefferson County Open Space, south bank of Bull Gulch, 23.0 km. north northwest of the GNIS location of Golden. Deep shade. Determined by comparison to Coll. No. 2069, which was made from the same plants. 18 Apr 2019. (CIBO, JCOS s.n., KHD 72524^‡).
2069, Lippincott Ranch. Jointly owned by City of Boulder OSMP and Jefferson County Open Space, south bank of Bull Gulch, 23.0 km. north northwest of the GNIS location of Golden. Deep shade. Same as Coll. No. 2019, 18 Apr 2019. 6 Jun 2019. (CIBO, JCOS s.n., KHD72525^‡).
2555, Apex Park - Northern Parcel. In an unnamed gulch with an ephemeral stream, roughly equal in size and catchment area with Deadman Gulch the next gulch to the north, about ⅓ of the way up the initial Front Range scarp, 4.51 km. south of the GNIS location of Golden. Steep, damp north-facing slope, in rocks under Ribes cereum, Prunus virginiana, and Amelanchier alnifolia. 7 Jul 2021. (COLO2706638^‡).

Equisetaceae

Equisetum arvense L.  Field Horsetail.
870.1, Parker Creek. Just upstream from the informal campground on Parker Creek, at the end of Forest Road 01S25 "Parker Creek Road," 3.5 miles by air southwest of the intersection of US Highway 395, and California Highway 158. Deep shade at streamside. 23 Jun 2012. (UC2015302^‡).
2639.1, Morrison Creek. Buffalo Creek Recreation Area, along Morrison Creek and former National Forest Road 547, 2.70 km. south of National Forest Road 550, 63.3 km. south of the GNIS location of Golden. Shaded bank of creek. Forest is generally more open here, and there is a meadow nearby. Also collected here: Aconitum columbianum. 5 Aug 2021. (CS, COLO2707347^‡, KHD75621^‡, OBI183677^‡).
2959.1, Guy Gulch. In the creek of Guy Gulch, southwest side of County Road 70, 125 m. southwest of the ranch house, 15.8 km. northwest of the GNIS location of Golden. 14 Jun 2023. (EIU, UCR, JCOS).
3173, Guy Gulch. Southwest side of the gulch, 680 m. northwest of Centennial Ranch, 12.8 km. northwest of the GNIS location of Golden. In shaded seep beside creek, with Betula occidentalis, willows , and cottonwoods. 31 Jul 2023. (CAS, CDA, COLO, CS, OBI, REGIS, KHD00080570^‡, JCOS).

Equisetum laevigatum A. Braun.  Smooth Horsetail.
1435, Colorado School of Mines Survey Field. Eastern, lower section of the Survey Field, 2.2 km. south of the GNIS location of Golden. High plains at the base of the Front Range, growing in dense vegetation along banks of a small creek. 15 Jun 2016. (CS, KHD00063428^‡, UC, UCR277996^‡).

Pteridaceae

Pellaea bridgesii Hook.  Bridges' Cliffbrake.
699, Lee Vining Canyon. In a rock crevice on a bedrock ridge about 0.4 miles northwest of the Aspen Campground, north side of Poole Power Station Road. 9 Aug 2010. (UC1980454^‡).

Cupressaceae

Juniperus californica Carriere.  California Juniper.
208, San Carlos Creek. Hillsides, 2 miles below New Idria Mine, 86 km southwest of Fresno, California. Hill slopes above and below road. 2 April 2000. (UC1953367^‡).

Juniperus communis L. var. depressa Pursh.  Common Juniper.
1361, Tin Cup Ridge. Along the top of “Tin Cup Ridge,” the northward extension of Dinosaur Ridge into Golden, 5.4 km. south of the GNIS location of Golden. 21 May 2016. (JCOS s.n., KHD00063425^‡, UCR277972^‡).
1606, Colorado School of Mines Survey Field. High plains at the lowest slopes of Lookout Mountain, northwest corner of the Survey Field, near Lookout Mountain Road, 1.95 km. southwest of the GNIS location of Golden. Shoulder of small gulch. 13 May 2017. (CDA0050060^‡, COLO2299782^‡, KHD00065345^‡).
2997, Guy Gulch. North of Guy Gulch, accessed by a ranch road off of Pyrenees Lane, on the southwest-facing slope 32 m. west northwest of the line shack, 1.14 km. west southwest of Mt. Tom, 13.8 km. (geodesic) northwest of the GNIS location of Golden. Open southwest-facing slope between Pinus ponderosa with Penstemon secundiflorus, Potentilla fissa, and Rubus deliciosus. 23 Jun 2023. (CAS, OBI, REGIS, JCOS).

Juniperus grandis R. P. Adams.  (Syn: J. occidentalis Hook. var. australis (Vasek) A.& N. Holmgren ) Sierra Juniper, Western Juniper.
901, Grant Lake. At the Grant Lake Overlook day use area at the south end of Grant Lake. Leaves scale-like, whorls of 3, berries blue-black, bark red-brown. 24 Aug 2012. (UC).

Juniperus osteosperma (Torrey) Little.  Utah Juniper.
114, Lobo Point. Lobo Point Camp, 2.6 km northwest of Hole-in-the-Wall, 14.7 km northeast of Mitchell Caverns. Verbatim coordinates: N 35° 03.069 W 115° 25.406 . (UC(TAS), Zzyzx s.n.).
571, Cedar Hill. Mineral County, Nevada, on the south side of Nevada State Route 359 (California Highway 167) 0.5 mi (0.9 km) east of California-Nevada border, 3.7 mi (6.0 km) southwest of Cedar Hill. Collected in an area that has been described as having unusually large specimens due to absence of fire. 7 Jul 2009. (CAS1117381^‡, UC1973781^‡).
572, Cedar Hill. Mono County, California, about 1.2 mi (2.0 km) west of California-Nevada state border on the north side of California Highway 167. Collected in an area that has been described as having unusually large specimens due to absence of fire. 7 Jul 2009. (UC1973782^‡).

Juniperus scopulorum Sarg.  (Syn: Sabina scopulorum Sarg.(Sarg.) Rydb. ) Rocky Mountain Juniper.
1244, Windy Saddle Park. Southeastern Windy Saddle Park, west of and above the Colorado School of Mines Survey Field, 2.19 km south southwest of the GNIS location of Golden. Several trees on the edge of a rocky ridge. 24 Jul 2015. (JCOS s.n., KHD00060587^‡, OBI83210^‡, UC, UCR267461^‡).
2382, Apex Park - Northern Parcel. About half way up the initial Rocky Mountain Front Range scarp, near the south edge of the restricted area, 5.03 km. south of the GNIS location of Golden. Mostly foothills shrubland with a few junipers, also collected nearby: Mirabilis linearis, Ranunculus glaberrimus, Grindelia squarrosa, and Andropogon gerardii. 17 Jul 2020. (CAS, CDA0053761^‡, COLO2434421^‡, CS198705^‡).
2966, Guy Gulch. Southwest side of the creek and County Road 70, 326 m. south southeast of the ranch house, 15.6 km. northwest of the GNIS location of Golden. Edge of flood plain, between hillslope brush and flood plain trees. 14 Jun 2023. (EIU, REGIS, JCOS, KHD ^‡).

Juniperus virginiana L.  Eastern Redcedar.
1775, North Washington Open Space. 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. Probable garden escapee. 11 Apr 2018. (CS198647^‡, KHD00069179^‡).

Ephedraceae

Ephedra L.  Joint Fir.
211, . Hillslopes, 15 miles north of New Idria Mine. Hill slopes above road. 2 April 2000.

Ephedra californica S. Watson.  Desert Tea.
210, Griswold Canyon. Hillslopes, on New Idria Road in Griswold Canyon, 5 miles by road south of Panoche, 16.5 miles by road northwest of New Idria, Hill slopes above road. 2 April 2000. (OBI82170^‡, OBI82171^‡, UC2045758^‡, UCR262116^‡, UCR262115^‡).

Ephedra nevadensis S. Watson.  Nevada Ephedra.
88, Lobo Point. Near Lobo Point, on rocks, faulted rhyolite, with Euphorbia, Rhus trilobata, Eriogonum fasciculatum, Salvia mohavensis, and Ferocactus cylindraceus. Coll. Nos. 88 and 89, included here with #88, comprise a mixed collection of male and female plants. 28 Apr 1997. (UC(TAS), Zzyzx s.n.).
226, Lobo Point. Along the road out of the Lobo Point camp site, between the opal beds and the andesite outcrop, 2.9 km northwest of the current (2015) Hole-in-the-Wall Visitor Center. Collection from both male and female plants, great clouds of pollen are produced by the male plants when tapped. 27 April 2000. (Golden, Zzyzx s.n.).
1573, Shadow Valley. On the now closed road to Kingston Wash, 12.6 miles north on Cima Road, Kingston Road, and then Excelsior Mine Road from the intersection of US Interstate 15 and Cima Road, then 0.4 miles west to the gate at the Kingston Range Wilderness. Staminate plant, no pistillate plants in immediate area. Location of my collections 1569 to 1574. 18 Apr 2017. (COLO, CS, EIU, UC).

Ephedra viridis Cov.  Green Ephedra.
33, Lobo Point. In woodland under Pinus monophylla. Common. . (UC(TAS), Zzyzx s.n.).
127, Mid Hills. Among granitic boulders along the ridge line of the Mid Hills. Common, with Brickellia californica, Ericameria linearifolia, Eriogonum fasciculatum, Opuntia acanthocarpa, O. erinacea, Pinus monophylla, Purshia tridentata glandulosa, , Rhus trilobata,Ribes velutinum, and Yucca baccata. Verbatim Coordinates: N 35° 07.004 W 115° 27.145. 30 Apr 1997. (UC(TAS), Zzyzx s.n.).
401, Magruder Mountain. West slope of Magruder Mountain, approximately 1 km south of Nevada Highway 266, 10 km west southwest of Lida. Open area with Pinyons and Sagebrush. 25 May 2004. (CAS1131497^‡, UCR241443^‡).
954, Mono Lake (southwest sector). Along Test Station Road, about 0.4 m east of Rush Creek, and 1.5 mi northwest of South Tufa Parking Area. 21 May 2013. (CAS1160963^‡, UC).

Pinaceae

Pinus cembroides Zucc.  Mexican Pinyon Pine.
739, Johnson. Four miles north of Exit 322 of US Interstate 10 on N. 7 Dash Road, at the north boundary of the private property of the Nord Resources, Inc., Johnson Camp Mine. This location is about 2 miles north of the former town of Johnson. Collected with Frasera albomarginata. Access and permission to collect courtesy of Nord Resources, Inc. 26 Apr 2011.

Pinus contorta Loudon ssp. murrayana (Grev. & Balf.) Critchf.  (Syn: P. murrayana Balf. ) Sierra Lodgepole Pine.
946, Sagehen Spring. Along a watercourse just below Sagehen Spring. 21 May 2013. (UC).

Pinus jeffreyi Grev. & Balf.  Jeffrey Pine.
945, Sagehen Spring. Slopes above the spring and campground. 21 May 2013.

Pinus monophylla Torrey & Fremont.  Single Leaf Pinyon Pine.
113, Lobo Point. Lobo Point Camp, 2.6 km northwest of Hole-in-the-Wall, 14.7 km northeast of Mitchell Caverns. Verbatim coordinates: N 35° 03.069' W 115° 25.406 . (UC(TAS), Zzyzx s.n.).

Pinus ponderosa Laws.  Ponderosa Pine.
908, Rush Creek (in Horseshoe Canyon). A few trees above and below California Highway 158 at the Gaging Station about 0.4 miles south of Grant Lake. 26 Aug 2012.
1316, Ranson/Edwards Homestead Open Space Park. Stevens parcel immediately south of the Ranson/Edwards parcel, 400 m west northwest of the Plainview Road bridge over Coal Creek, 14.5 km north northwest of the GNIS location of Golden. Upper slopes just below the railroad tracks. 14 Apr 2016. (JCOS s.n., KHD00067749^‡).

Pseudotsuga menziesii (Mirb.) Franco var. glauca (Beissn.) Franco.  (Syn: Pseudotsuga menziesii (Mirb.) Franco var. glauca (Mayr) Franco ) Douglas Fir.
1502, North Table Mountain Park. North slope of North Table Mountain, 30 m. east of and above the Mesa Top Trail (radio tower access road), 3.4 km. north of the GNIS location of Golden. In brush on moderate northwest slope, only such tree seen. 13 Jul 2016. (JCOS s.n., KHD00063565^‡).

Aizoaceae

Carpobrotus edulis (L.) N. E. Br.  Freeway Iceplant. Weed: CA, CAL-IPC, List: High.
1042, Bay Farm Island, City of Alameda. Northwest shore of Bay Farm Island, along the Shoreline Trail, approximately opposite the extension of Kara Road to the shore. Growing with Heliotropium curassavicum var. oculatum and Lepidium latifolium. 29 Sep 2013. (CDA0050009^‡, UC2045728^‡).

Sesuvium verrucosum Raf.  Western Sea Purslane.
1053, Danby Lake. 4 Dec 2013.

Amaranthaceae

Amaranthus albus L.  Tumble Pigweed.
3045, Golden. Yard at 900 5th Street, cross street Arapahoe St., 0.83 km. northwest of the GNIS location of Golden. Common adventive garden weed. 4 Jul 2023. (CofG, KHD ^‡).

Amaranthus torreyi (A. Gray) Benth.  Torrey's Amaranthus.
141, Lobo Point. In a small valley dominated by a point of rocks known locally as Lobo Point, 2.7 km northwest of current (2015) Hole-in-the-Wall Visitor Center, 14.56 km northeast of Mitchell Caverns. . (Golden, Zzyzx s.n.).

Froelichia gracilis (Hook.) Moq.  Slender Snakecotton.
3206, Welch Ditch. 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. Upper side of flume only, not seen below. Only plant growing here. 30 Aug 2023. (CS, OBI, KHD ^‡, JCOS).

Anacardiaceae

Rhus glabra L.  Smooth Sumac.
2556, Apex Park - Northern Parcel. Beside a stream in an unnamed gulch, near the center of the north parcel, 4.52 km. south southwest of the GNIS location of Golden. 7 Jul 2021. ( s.n., KHD75545^‡, OBI183414^‡, UCR294561^‡).

Rhus microphylla Engelm. ex A. Gray.  Little-Leaf Sumac.
733, Johnson. Four miles north of Exit 322 of US Interstate 10 on N. 7 Dash Road, at the north boundary of the private property of the Nord Resources, Inc., Johnson Camp Mine. This location is about 2 miles north of the former town of Johnson. Collected with Frasera albomarginata. Access and permission to collect courtesy of Nord Resources, Inc. 26 Apr 2011. (UC1980506^‡).

Rhus trilobata Nutt.  Squawbush.
36, Lobo Point. In woodland with Pinus monophylla. Common. . (UC(TAS), Zzyzx s.n.).

Rhus trilobata Nutt. var. trilobata.  (Syn: Rhus aromatica Aiton var. trilobata (Nutt.) A. Gray ex S. Watson ) Skunkbush Sumac.
1369, North Table Mountain Park. Lower west-facing slopes of North Table Mountain, off the North Table Loop, 500 m. north of the trailhead off CO Highway 93, 3.5 km. north of the GNIS location of Golden. 24 May 2016. (JCOS s.n., KHD00063919^‡, UCR277973^‡).
1861, Tin Cup Ridge. Lower east slopes of Tin Cup Ridge, the northward extension of Dinosaur Ridge into Golden, 4.80 km. south southeast of the GNIS location of Golden. 23 May 2018. (CAS, JCOS s.n., KHD00069142^‡).
2041, 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 Variety trilobata if infraspecific names are to be applied. 2 Jun 2019. (KHD71100^‡, OBI183249^‡, REGIS s.n.).
2139, North Table Mountain Park. Near the north boundary of the park, lower north slopes of North Table Mountain, in what appears to be the hummocky terrain of an ancient landslide, 6.06 km. north northeast of the GNIS location of Golden. Near top of small mound, also collected here: Opuntia macrorhiza and Thelesperma megapotamicum. 11 Jul 2019. (JCOS s.n., KHD74277^‡).
2401, Dakota Ridge. 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. 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. 29 Jul 2020. (COLO2433886^‡, UC).
2460, Clear Creek Canyon Park. About 80 m. south of the Welch Ditch, up one of the larger gulches on the south side of Clear Creek, 2.4 km. west of the GNIS location of Golden. East-facing slope, with Cercocarpus montanus. Leaves and young twigs pubescent, not pilose. 19 May 2021. (CS, EIU, s.n., CDA54478^‡).

Rhus virens Lindh. ex A. Gray var. choriophylla (Woot. & Standl.) L.D. Benson.  Evergreen Sumac.
734, Johnson. Four miles north of Exit 322 of US Interstate 10 on N. 7 Dash Road, at the north boundary of the private property of the Nord Resources, Inc., Johnson Camp Mine. This location is about 2 miles north of the former town of Johnson. Collected with Frasera albomarginata. Access and permission to collect courtesy of Nord Resources, Inc. 26 Apr 2011. (UC1980504^‡).

Apiaceae

Aegopodium podagraria L.  Bishops Goutweed.
2128, Heritage Dells. Backyard of 209 Berthoud Way, Golden. 5.58 km. south of the GNIS location of Golden. Non-varigated form. Escaping through side fence where watered, but apparently not through the back fence into unwatered open space. Not seen in Apex Gulch, City of Golden open space, 100 m. south. 7 Jul 2019. (CDA0052300^‡, CIBO, COLO2434207^‡, JCOS s.n., KHD72747^‡, OBI186006^‡).

Aletes acaulis (Torr.) J.M. Coult. & Rose.  Stemless Indian Parsley.
1321, North Table Mountain Park. Southwest rim of North Table Mountain, 1.55 km north of the GNIS location of Golden. Edges of cliffs. 4 May 2016. (JCOS s.n., KHD00063815^‡, UCR277964^‡).
1925, North Table Mountain Park. Top of North Table Mountain, in the main basalt quarry near the west edge of the mesa, 2.2 km. north of the GNIS location of Golden. Base of northwest-facing wall of quarry, with Hydrophyllum fendleri, Penstemon virens, Prunus virginiana, Brickellia california, and Physaria vitulifera. 8 Jun 2018. (?, JCOS s.n., KHD00069136^‡, OBI170744^‡).
2312.4, Clear Creek Canyon Park. 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. Also collected here: Sedum lanceolatum, Comandra umbellata subsp. pallida, Eriogonum umbellatum var. umbellatum, and Physocarpus monogynus. Popular rock-climbing area with heavy daily use. 3 Jun 2020. (COLO2434470^‡, CS198717^‡, UC).
3253, Coal Creek Canyon Study Area, Lacey Parcel. rocky forest floor 10 Jun 2024. (Undist.).

Angelica lineariloba A. Gray.  Poison Angelica.
556, East Craters Sand Flat. on Forest Road 1N24 on east side of East Craters Sand Flat, 13 Aug 2008. (UC1953406^‡).

Anthriscus caucalis M. Bieb.  Bur Chervil.
2492, Lippincott Ranch. In the narrow “wasp waist” part of the ranch, 525 m. northwest of the main gate, 22.1 km. north northwest of the GNIS location of Golden. Under ponderosa pines, with Pseudostellaria. Coordinates estimated with GoogleEarth. Lippincott Ranch is jointly owned by City of Boulder Open Space and Mountain Parks and Jefferson County Open Space. 4 Jun 2021. (CIBO, CS, s.n.).
2546, Lippincott Ranch. Southern "panhandle" part of the ranch, on a ridge in the north-central to northwest part, 22.0 km. north northwest of the GNIS location of Golden. In scattered ponderosa pines, with Phacelia heterophylla, Descurainia sophia, Opuntia fragilis, and Malva neglecta. Lippincott Ranch is jointly owned by City of Boulder Open Space and Mountain Parks and Jefferson County Open Space. EDDMaps: 12006501. 29 Jun 2021. (CIBO, s.n., KHD75520^‡, OBI183675^‡).

Apiaceae .  Something from the Carrot family.
3329, Brumley. closer to creek in saturated soil 23 Jul 2024. (Undist.).
3348.1, Unnamed Gulch on Forest Road 189. bank of creek 24 Jul 2024. (Undist.).

Berula erecta (Huds.) Coville.  Cut-Leaf Water Parsnip.
717.1, Rush Creek delta. On a former strand of Mono Lake in the Rush Creek delta, 1 km downstream from Test Station Road, 6 km by air east of Lee Vining, Mono County, California. 30 Aug 2010. (UC1980415).

Cicuta maculata L. var. angustifolia Hook.  Spotted Water Hemlock.
499, Bohler Canyon. Along the dirt road on the south side of Bohler Canyon, 1.8 mi (3.0 km) by air west of US Highway 395. 2 Aug 2007. (CAS1121270^‡, UC1973698^‡).
3285, Ranson/Edwards Homestead Open Space Park. growing in creek 28 June 2024. (Undist.).

Conium maculatum L.  Common Poison Hemlock. Weed: CO, CO DofA, List: C.
1436, Colorado School of Mines Survey Field. Eastern, lower section of the Survey Field, between US Highway 6 and Lookout Mountain, 2.2 km. south of the GNIS location of Golden. High plains at the base of the Front Range, growing in dense vegetation along banks of a small creek. Colorado Noxious Weed List C. 15 Jun 2016. (CDA0050101^‡, KHD00063990^‡, UCR277995^‡).
2768, DeLong Park (City of Golden). New city park (construction in 2021 and 2022) near the intersection of 23rd Street and Vernon Drive, 1.75 km. southeast of the GNIS location of Golden. Growing on side of small watercourse, probably pre-dates designation of park and construction. Colorado Noxious Weed List C. 6 May 2022. (Golden s.n.).

Cyclospermum leptophyllum (Pers.) Sprague ex Britton & P. Wilson.  Marsh Parsley.
134, Alameda. Common garden weed. . (UC).

Cymopterus cinerarius A. Gray.  Gray Springparsley.
703, Mono Craters. 1.4 miles southeast of Crater Mountain, on a small ridge of cinders. In pine needle-covered areas beneath Jeffrey pines. 16 Aug 2010. (UC1973771^‡).
754, Mono Basin. Along California Highway 120, 8 miles east of US Highway 395. Around Jeffrey pines, in pine needles, and other places with more organic matter than typically found in the volcanic cinder sands. 16 Jun 2011. (UC1980491^‡).

Cymopterus terebinthinus (Hook.) Torr. & A. Gray var. californicus (J. M. Coult. & Rose) Jeps.  (Syn: Pteryxia terebinthina (Hook.) J. M. Coult & Rose var. californica (J. M. Coult. & Rose) Mathias )
775, Horseshoe Canyon Moraine. Between lateral moraines on Inyo Forest Road 01S31 “Reversed Peak” road, 1.5 miles south of the Rush Creek Return Ditch Gatehouse, and 2.6 miles north of Reversed Peak. 20 Jun 2011. (UC2045752^‡, UCR262130^‡).

Harbouria trachypleura (A. Gray) J.M. Coult. & Rose.  (Syn: Thaspium trachypleurum A. Gray ) Whiskbroom Parsley.
1357, Tin Cup Ridge. Along the top of “Tin Cup Ridge,” the northward extension of Dinosaur Ridge into Golden, 5.5 km. south of the GNIS location of Golden Open, rocky ridge with Cercocarpus and ponderosa pine. 21 May 2016. (CAS, JCOS s.n., KHD00063839^‡, OBI83173^‡, UC, UCR278787^‡).
1380, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 15.8 km. north northwest of the GNIS location of Golden, 1.7 mi. west on CO Hwy 72 from CO Hwy 93, 1.4 mi. north on Plainview Road, then 620 m. north of Plainview Road. On break in slope above reservoir. 29 May 2016. (CS, JCOS s.n., KHD00063829^‡).
1408, Ranson/Edwards Homestead Open Space Park. 1.6 mi. west on CO Hwy 72 from CO Hwy 93, then 2.4 mi. northerly on Plainview Road, then 40 m. or so south of the road. 16 km. north northwest of the GNIS location of Golden. Among grasses and ponderosa pines, near top of south-facing slope. 10 Jun 2016. (COLO02348357^‡, EIU, JCOS s.n., KHD00063836^‡).
1439, Colorado School of Mines Survey Field. Eastern, lower section of the Survey Field, between US Highway 6 and Lookout Mountain, 2.35 km. south of the GNIS location of Golden. Uncommon. Steep northwest facing slope above ephemeral creek from Lookout Mountain. 15 Jun 2016. (KHD00064005^‡).
1904, Little Scraggy Peak. Buffalo Creek Recreation Area, northeast slopes of Little Scraggy Peak, 46.5 km. south of the GNIS location of Golden. 31 May 2018. (CAS, KHD00069137^‡, OBI170748^‡).
2306.1, Apex Park - Northern Parcel. Northernmost quadrant of the parcel, north side of Deadman Gulch, in a small saddle near the top of the initial Rocky Mountain Front Range scarp, 4.14 km. south southwest of the GNIS location of Golden Small opening among Rocky Mountain junipers and ponderosa pines; also collected here: Erysimum capitatum and Physaria montana. 26 May 2020. (CDA0053741^‡, REGIS s.n.).
2940, Guy Gulch. Douglas Mountain Study Area, area along Guy Gulch, about 80 m. above the road, north side of Jefferson County Road 70 and near western boundary, 17.7 km. northwest of the GNIS location of Golden. Nose of small southeast plunging ridge, with Heterotheca villosa and Cercocarpus montanus. 6 Jun 2023. (COLO, CS, UCR, JCOS).
2995, Guy Gulch. North of Guy Gulch, accessed by a ranch road off of Pyrenees Lane, on the southwest-facing slope 30 m. northwest of the line shack, 1.13 km. west southwest of Mt. Tom, 13.8 km. (geodesic) northwest of the GNIS location of Golden. Rocky hillslope with Juniperus communis var. depressa, Pinus ponderosa, and Rubus deliciosus. 23 Jun 2023. (CAS, EIU, OBI).

Ligusticum porteri J.M. Coult. & Rose.  Porter's Licorice-Root.
2610, Lippincott Ranch (North). Northern part of ranch, north-facing slope overlooking Spring Brook. 2.2 km. north of the main gate, 23.8 km. north northwest of the GNIS location of Golden. Deep grasses in openings of ponderosa pine woodland. Lippincott Ranch is jointly owned by City of Boulder Open Space and Mountain Parks and Jefferson County Open Space. 20 Jul 2021. (CIBO, s.n., KHD75389^‡, OBI183794^‡).
2833, Lippincott Ranch (North). Along the north fork of Spring Brook, 2.53 km. north northwest of the main gate, 2.42 km. south southwest of the GNIS location of Eldorado Springs. Sunny spot, more plants in vegetative state in shade. 2 Jul 2022. (COLO).
3248, Coal Creek Canyon Study Area, Lacey Parcel. beside a cobble-y creek bed Cynoglossum officinale, Silene latifolia, Lupinus argentea, Prunus virginiana, 10 Jun 2024. (Undist.).
3269, Coal Creek Canyon Study Area, Lacey Parcel. Also here Acer glabrum, Prunus virginiana, Geranium caespitosum, Amelanchier alnifolia. 21 Jun 2024. (Undist.).

Lomatium foeniculaceum (Nutt.) J. M. Coult. & Rose ssp. fimbriatum W. L. Theob. 
394, Magruder Mountain. West slope of Magruder Mountain, 0.3 mi south of Nevada Highway 266, 6.3 miles by road west of Lida, Nevada. Between a Pinyon woodland and Sagebrush. 25 May 2004. (UC2015255^‡, UCR240690^‡).

Lomatium nevadense (S. Watson) J. M. Coult. & Rose var. nevadense. 
960, Bridgeport Canyon. Along Coyote Springs Road, about ⅓ mile southeast of the pass, at a watercourse crossing the road from southwest to northeast, 6˝ miles by road north of California Highway 167. 22 May 2013. (CAS1161743^‡, UC).

Lomatium orientale J.M. Coult. & Rose.  Salt-and-Pepper.
1077, Ranson/Edwards Homestead Open Space Park. On a somewhat rocky alluvial terrace, north side of an unnamed creek, 1.2 miles north on Plainview Road from the intersection with Colorado State Highway 72, Coal Creek Canyon Road, and then 200 m east across the field. Occasional on drier or more-exposed surfaces. 23 Mar 2015. (JCOS s.n.).
1322, North Table Mountain Park. Top of mesa, near southwest edge, 1.55 km north of the GNIS location of Golden. Widespread on mesa-top lava flow derived soils and colluvial soils of upper and lower slopes. 4 May 2016. (JCOS s.n., KHD00063812^‡, OBI83175^‡, UCR278795^‡).
1326, Ranson/Edwards Homestead Open Space Park. Stevens parcel just south of Ranson/Edwards parcel, about 180 m. northwest of the Plainview Road bridge over Coal Creek, 3.65 km west southwest of the GNIS location of Rocky Flats, Gentle east-facing grassy slopes. 5 May 2016. (CS, JCOS s.n., KHD00063813^‡, OBI83174^‡, UCR278788^‡).
1356, Tin Cup Ridge. Along the top of “Tin Cup Ridge,” the northward extension of Dinosaur Ridge into Golden, 5.5 km. south of the GNIS location of Golden Thin soils between layers of upturned strata. 21 May 2016. (CAS, JCOS s.n., KHD63817^‡, OBI83166^‡, UC, UCR 278796^‡).
1837, Ranson/Edwards Homestead Open Space Park. 1.7 miles west on CO Highway 72 from CO Highway 93, then 1.4 miles generally north on Plainview Road, then about 567 m. northeast past the old homestead, about 15.9 km. north of the GNIS location of Golden. Along a low ridge that is a little drier and rockier than surrounding grass land; moss growing on bare soil. 17 May 2018. (COLO02347672^‡, EIU).
1895, Colorado School of Mines Survey Field. Highest Great Plains at the base of the Rocky Mountain Front Range, southeast-facing slope, above an unnamed stream in the south end of the Survey Field, 2.36 km. south of the GNIS location of Golden. 28 May 2018. (COLO02347649^‡, CS198591^‡).
2031, Lippincott Ranch. Jointly owned by City of Boulder OSMP and Jefferson County Open Space, near the northern edge of the property and the Boulder County boundary, east side of ridge, 25.6 km. north northwest of the GNIS location of Golden. In thick soil and forest duff on the exposed east side of a ridge. 26 May 2019. (CDA0052284^‡, CIBO, JCOS s.n.).
2042.1, 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. 2 Jun 2019. (KHD 71098^‡).
2075, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 1.7 mi. west on CO 72 from CO 93, 1.2 mi. generally north on Plainview Road, then approx. 300 m. northeast on an old road in the direction of the original homestead. Open prairie, lightly grazed in some recent years. Geographic coordinates estimated with GoogleEarth. 10 Jun 2019. (CIBO, EIU, REGIS s.n.).
2265.1, Dakota Ridge. Southern end of the hogback in northernmost Golden, 4.16 km. north northwest of the GNIS location of Golden. Mixed-grass prairie just below foothills mountain mahogany shrubland; collected here: Cerastium arvense, Scutellaria brittonii, Amelanchier alnifolia, nearby: Cercocarpus montanus. 9 May 2020. (CAS, CDA0053728^‡).
2920, Schweich Hill. Near northern boundary, near the bottom of the original hill slope, 2.30 km. northwest of the GNIS location of Golden with Artemisia ludoviciana, in an area of encroaching smooth brome. 21 May 2023. (REGIS, COLO).
2929, Magpie Gulch. In Mt. Galbraith Park, beside a bed rock cascade of the creek in Magpie Gulch, about 900 m. west of the gate to the parcel, 2.81 km. west northwest of the GNIS location of Golden. Dry slope west and away from rock cascade. 21 May 2023. (COLO, CAS).

Musineon divaricatum (Pursh) Raf.  Leafy Wildparsley.
2023, Lippincott Ranch. Jointly owned by City of Boulder OSMP and Jefferson County Open Space, south parcel, high prairie above Rocky Flats, 21.7 km. north northwest of the GNIS location of Golden. Heavy clay soil. 24 Apr 2019. (CIBO, JCOS s.n., KHD 70556^‡).
2918, Eagle Ridge. 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. Also here: Lomatium orientale, Helianthus pumilis, Mertensia lanceolata, Astragalus drummondii, Scutellaria brittonii, and Cercocarpus montanus. 9 May 2023. (CAS, COLO, EIU, UCR, CDA56585^‡, CS202024^‡, OBI^‡).

Osmorhiza berteroi DC.  Sweet Cicely.
2619, Spring Brook. Northern part of ranch, north-facing slope overlooking Spring Brook. 2.3 km. north of the main gate, 23.9 km. north northwest of the GNIS location of Golden. Terrace above Spring Brook, edge of ponderosa pine woodland. Lippincott Ranch is jointly owned by City of Boulder Open Space and Mountain Parks and Jefferson County Open Space. 20 Jul 2021. (CIBO, s.n., KHD75387^‡, OBI183683^‡).

Osmorhiza depauperata Phil.  Blunt-Fruit Sweet-Cicely.
2069.1, Lippincott Ranch. Jointly owned by City of Boulder OSMP and Jefferson County Open Space, south bank of Bull Gulch, 23.0 km. north northwest of the GNIS location of Golden. 6 Jun 2019. (CIBO, JCOS s.n., KHD 75523^‡).
2951, Guy Gulch. Along stream tributary to Guy Gulch, about 310 m. north of County Road 70, near the western boundary of the study area, 17.7 km. northwest of the GNIS location of Golden. Shaded floor of small gulch. 6 Jun 2023. (COLO, OBI, JCOS).
3055, Morrison Creek. Small terrace above Morrison Creek, near crossing of Little Scraggy Trail, 1.16 km. southwest of Little Scraggy Peak, 50.0 km. south of Golden; accessed by way of Kelsey Campground and Jefferson County Road 126. Forested, shaded, wet bank of creek; also collected nearby: Pyrola chlorantha, Rubus pubescens, Pedicularis canadensis, and Oryzopsis asperifolia. 10 Jul 2023. (CAS, UCR).

Oxypolis fendleri (A. Gray) Heller.  Fendler's Cowbane.
2713, Brumley. Along the bank of the North Fork of Lake Creek, opposite the Sno-Tel station, about 11 road miles generally west on Colorado Highway 82 from the town of Twin Lakes, 175 km. southwest of Golden. Shaded bank of creek. Brumley was a stage stop on the route across Independence Pass. 18 Aug 2021. (COLO2707339^‡, KHD75284^‡, OBI183793^‡).
3120, Unnamed Gulch on Forest Road 189. Along Forest Road 189, about 1 km. east of County Road 18 “East Tennessee Road,” 5.69 km. (geodesic) north northwest of the GNIS location of Leadville. South of the road in willow thicket, on bank of creek. 19 Jul 2023. (CAS, COLO, CS, EIU, UCR).

Perideridia bolanderi (A. Gray) A. Nelson & J. F. Macbr. ssp. bolanderi.  Bolander Yampah.
961, Bridgeport Canyon. Along Coyote Springs Road, about ⅓ mile southeast of the pass, at a watercourse crossing the road from southwest to northeast, 6˝ miles by road north of California Highway 167. 22 May 2013. (UC, UCR250020^‡).

Perideridia parishii (J. M. Coult. & Rose) A. Nelson & J. F. Macbr. ssp. latifolia (A. Gray) Chuang & Constance.  Parish's Yampah.
434, Monitor Pass. On Loope Canyon Road, also known as Morning Star Road, 2.6 miles by air northwest of Monitor Pass, and 6.3 miles by air east of Markleville, CA. 31 July 2004. (CAS1149300^‡, UC2015332^‡, UCR241430^‡).

Pseudocymopterus montanus (A. Gray) J. M. Coult. & Rose.  (Syn: Cymopterus lemmonii (J. M. Coult. & Rose) Dorn ) Alpine False Springparsley.
1469, Evans Gulch. Mosquito Range, middle section of Evans Gulch, near Conley Lakes and the Diamond Mine, 4.6 mi. by road east of the GNIS location of Leadville. Southeast-facing open slope with mostly forbs. 29 Jun 2016. (CAS, EIU, OBI83317^‡).
3023, Guy Gulch. Edge of forest near the creek in Guy Gulch, southwest side of County Road 70, 1.14 km. northwest of Centennial Ranch house, 13.3 km. (geodesic) northwest of the GNIS location of Golden. Grasses surrounded by Douglas fir forest, Mertensia lanceolata, Aquilegia coerulea, Fragaria vesca, and Viola canadensis. 3 Jul 2023. (UCR, JCOS, KHD ^‡).
3061, Morrison Creek. Open forest near the divide between Morrison Creek and Sixmile Creek, 966 m. southwest of Little Scraggy Peak, 49.8 km. south of the GNIS location of Golden; accessed by way of Kelsey Campground and Jefferson County Road 126. Also collected here: Arabis pycnocarpa. On the horse trail (old road?) just north of the Little Scraggy Trail. 10 Jul 2023. (COLO, CS, REGIS, CDA).
3102.3, West Tennessee Creek. Former meander of West Tennessee Creek, 575 m. (geodesic) southeast of Lily Lake, 12.3 km. (geodesic) north northwest of Leadville. Collected with Potentilla gracilis var. fastigiata, Danthonia intermedia, and Phleum alpunum. 18 Jul 2023. (Undist.).
3126, Unnamed Gulch on Forest Road 189. Along Forest Road 189, about 1 km. east of County Road 18 “East Tennessee Road,” 5.69 km. (geodesic) north northwest of the GNIS location of Leadville. South side of the gulch on the edges of an open aspen forest. 19 Jul 2023. (Undist.).
3135, Evans Gulch. Middle section of Evans Gulch, near Conley Lakes and the Diamond Mine, 4.6 mi. by road east of the GNIS location of Leadville. Sunny open southeast-facing slope. 20 Jul 2023. (CS, EIU, UCR, KHD ^‡).
3313, Salt Creek. 22 Jul 2024. (Undist.).

Apocynaceae

Amsonia tomentosa Torrey & Fremont.  Woolly Bluestar.
237, Mesquite Valley. Along a small road on the California-Nevada border, southwest side of Black Butte, approximately 1˝ km southeast of Lovell Wash, 62 km southwest of Las Vegas, Nevada. Edge of wash. 30 April 2000. (?, UC1953392^‡).

Apocynum ×floribundum Greene.  Dogbane.
1442, North Table Mountain Park. Western side of North Table Mountain, in roadside ditch along road to City of Golden water tank, 2.8 km. north of the GNIS location of Golden. 22 Jun 2016. (JCOS s.n., KHD00063840^‡, OBI83328^‡, UCR278005^‡).
1466, Ranson/Edwards Homestead Open Space Park. Flood plain of Coal Creek, 1.6 mi. west on CO Hwy 72 from CO Hwy 93, 0.9 mi. generally north on Plainview Road, then 340 m. generally east on an old road leading to Coal Creek; 14.7 km. north northwest of the GNIS location of Golden. In dense vegetation at edge of old road. 27 Jun 2016. (COLO02348878^‡, CS, JCOS s.n., KHD00063977^‡).
1678, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 1.7 miles west on CO Highway 72 from CO Highway 93, 1.3 miles north on Plainview Road, then 20 meters east into open prairie. Along old road in the direction of the original homestead. 28 Jun 2017. (CDA0050015^‡, EIU029805^‡, JCOS s.n., KHD00065483^‡).
2180, Little Scraggy Peak. Buffalo Creek Recreation Area, northeast slopes of Little Scraggy Peak, fairly close to Little Scraggy trailhead, about 4 mi. south of town of Buffalo Creek by Cty Rd 126, 60.3 km. south of the GNIS location of Golden. Openings in ponderosa pine, also seen/collected here; Achillea millefolium, Sedum lanceolatum, Oxytropis lambertii, Verbascum thapsus, and Elymus elymoides. Area generally disturbed by minerals prospecting, fuels reduction, and mountain biking recreation. 23 Jul 2019. (KHD00070564^‡, OBI186017^‡, REGIS, UCR).
2378, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 1.7 mi. west on CO Hwy 72 from CO Hwy 93, 1.3 mi. generally north on Plainview Road, then 50 m. northeast on an old ranch road, 20.0 km. north northwest of the GNIS location of Golden. 23 Jun 2020. (CAS, COLO2434413^‡, CS, UC).
2534, Lippincott Ranch. Southeastern "panhandle" portion of ranch, on the north boundary of Ranson/Edwards Homestead Open Space, nearly under the power line, 21.8 km. north northeast of the GNIS location of Golden. Seasonally wet slope with a few ponderosa pines. Lippincott Ranch is jointly owned by City of Boulder Open Space and Mountain Parks and Jefferson County Open Space. 29 Jun 2021. (CAS, CDA, CIBO, EIU, UC, JCOS).
2990, Deadman Gulch. Between the 6th Avenue Trail and the creek of Deadman Gulch, 2.24 km. (geodesic) south of GNIS location of Golden Highly disturbed habitat between trails. 19 Jun 2023. (CAS, CDA, UCR, OBI).

Apocynum androsaemifolium L.  Bitter Dogbane.
3268, Coal Creek Canyon Study Area, Lacey Parcel. 21 Jun 2024. (Undist.).

Asclepiadaceae

Asclepias asperula Woodson.  Antelope Horns.
261, Potosi Mountain. Potosi Mountain Road, just past private camps, 3 km west of NV Highway 160. Loose limestone soil on moderate slopes. 7 June 2000. (UC1953435).

Asclepias erosa Torrey.  Desert Milkweed.
23, Lobo Point. Rare, on alluvial soil. . (Zzyzx s.n.).
152, Kelso. Along Kelso-Cima Road, near Kelso. 3 Oct 1997. (UC(TAS), Zzyzx s.n.).
240, Mesquite Valley. On Old Spanish Trail highway, just west of Nevada border. 30 April 2000. (UC1953393^‡).
255, Wild Horse Canyon. In Wild Horse Canyon Wash on the cherry stem road into the Blue Jay Mine, north end of Wild Horse Mesa. 278 km northeast of Los Angeles, California. 5 June 2000. (UC(TAS), Zzyzx s.n.).

Asclepias hallii A. Gray.  Hall's Milkweed.
3319, Salt Creek. road cut 22 Jul 2024. (Undist.).

Asclepias pumila (A. Gray) Vail.  Plains Milkweed.
1508, North Table Mountain Park. Lower north slopes of North Table Mountain, 0.79 km southeast of the Mesa Spur Trailhead in 58th Avenue, 4.65 km. north northeast of the GNIS location of Golden. Growing in low grasses and forbs. 22 Jul 2016. (EIU, JCOS s.n., KHD00063944^‡, UC).

Asclepias speciosa Torr.  Showy Milkweed.
1204, Colorado School of Mines Survey Field. In a ditch adjacent to an old dirt road, near the center of the Survey Field, 2.2 km south southeast of the GNIS location of Golden. 12 Jul 2015. (KHD00062142^‡).
2101, Tin Cup Ridge. East base of the hogback locally called Tin Cup Ridge, the northward extension of Dinosaur Ridge into Golden, 6.4 km. south southeast of the GNIS location of Golden. Mixed grasses and forbs. Collected with Achillea millefolium, Erigeron tracyi, Glycyrrhiza lepidota, and Medicago lupulina. 30 Jun 2019. (JCOS s.n., KHD00070547^‡).

Asclepias stenophylla A. Gray.  Narrow-leaved Milkweed.
2379, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 1.7 mi. west on CO Hwy 72 from CO Hwy 93, 0.9 mi. generally north on Plainview Road, then 550-600 m. west to the southwest corner of the parcel, 19.4 km. north northwest of the GNIS location of Golden. First recognized at Ranson/Edwards by Irene Weber. CNHP rare plant rank S2, global rank G4G5. 12 Jul 2020. (KHD00072981^‡).

Asteraceae
3357, Ranson/Edwards Homestead Open Space Park. 26 Jul 2024. (Undist.).
3365, Ranson/Edwards Homestead Open Space Park. 30 Aug 2024. (Undist.).

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.
482, Coyote Spring. Growing in the meadow at Coyote Spring, Bridgeport Canyon, 4 miles north of California Highway 167. 26 Jun 2007. (CAS1131490^‡, UC1980450^‡).
503, Bohler Canyon. Wet meadow along the dirt road on the south side of Bohler Canyon, 1.8 mi (3.0 km) by air west of US Highway 395. 2 Aug 2007. (CAS1121621^‡, UC1973738^‡).
1023, Walker Creek (Lower). In Pumice Valley, near the banks of lower Walker Creek, where crossed by an old alignment of US Highway 395, 4.5 miles by road south of Lee Vining. 24 Jul 2013. (OBI126712^‡, UCR262294^‡).
1251, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 15.2 km north northeast of Golden, 1.3 miles north of CO State Highway 72 on Plainview Road, 175 m. west of Plainview Road. Banks of intermittent stream. 26 Jul 2015. (JCOS s.n., KHD00062047^‡, UC, UCR267464^‡).
1485, Colorado School of Mines Survey Field. High plains at the base of the Rocky Mountain Front Range, 2.4 km. south southwest of the GNIS location of Golden Mixed shrubs and grasses on lower slopes of Lookout Mountain. 6 Jul 2016. (COLO02347656^‡, CS, KHD00063993^‡, OBI83306^‡).
1494, North Table Mountain Park. Top of North Table Mountain, base of north-facing rocky slope (fault scarp?) above pond, 3.3 km. north northeast of the GNIS location of Golden. 13 Jul 2016. (CS, JCOS s.n., KHD00063465^‡).
2083, Lippincott Ranch. Northernmost Jefferson County, parcel jointly owned by Jefferson County Open Space and City of Boulder OSMP, narrows of the parcel between central and southeast portions, 22 km. north northwest of the GNIS location of Golden. Edge of open ponderosa pine woodland at break in slope. 17 Jun 2019. (CIBO, JCOS s.n., KHD00072417^‡, REGIS).
2098, Tin Cup Ridge. East base of the hogback locally called Tin Cup Ridge, the northward extension of Dinosaur Ridge into Golden, 6.4 km. south southeast of the GNIS location of Golden. Mixed grasses and forbs. Collected with Erigeron tracyi, Heterotheca villosa, Medicago lupulina, and Poa compressa. 30 Jun 2019. (CDA0052295^‡, COLO2434702^‡, JCOS s.n., KHD00070549^‡, OBI183247^‡).
2181, Little Scraggy Peak. Buffalo Creek Recreation Area, northeast slopes of Little Scraggy Peak, fairly close to Little Scraggy trailhead, about 4 mi. south of town of Buffalo Creek by Cty Rd 126, 60.3 km. south of the GNIS location of Golden. Openings in ponderosa pine, also seen/collected here; Apocynum ×floribundum, Sedum lanceolatum, Oxytropis lambertii, Verbascum thapsus, and Elymus elymoides. Area generally disturbed by minerals prospecting, fuels reduction, and mountain biking recreation. 23 Jul 2019. (KHD00070562^‡, OBI186071^‡, REGIS, UCR).
2553, Apex Park - Northern Parcel. South side of an unnamed gulch, near the center of the north parcel, 4.50 km. south of the GNIS location of Golden. Moderate northwest slope along an elk trail on the south side of the gulch; also collected here: Monarda fistulosa. 7 Jul 2021. (CAS, CDA, UC, JCOS).
2604, Unnamed meadow on Forest Road 109. Southern part of the ridge that includes Mount Zion and Buckeye Peak, about 2.7 road miles north of Leadville, access to Forest Road 109 from US Highway 24, 140 km. southwest of Golden. East end of meadow, edges of the forest, also collected here: Astragalus alpinus, Vicia americana, Leptosiphon nuttallii, nearby: Campanula parryi, and Collomia linearis. 15 Jul 2021. (CS, EIU, COLO2718468^‡).
3306, Coal Creek Canyon Study Area, Lacey Parcel. Open meadow with Achillea millefolia, Artemisia dracunculus, A. ludoviciana, Heterotheca villosa, Symphyotrichum laeve, Monarda fistulosa, Potentilla fissa, and Carex inops var. heliophila. 19 Jul 2024. (Undist.).
3321, Brumley. 23 Jul 2024. (Undist.).
3340, Unnamed Gulch on Forest Road 189. 24 Jul 2024. (Undist.).

Agoseris aurantiaca (Hook.) Greene.  Orange-Flower Goat-Chicory.
3341, Unnamed Gulch on Forest Road 189. 24 Jul 2024. (Undist.).
3346, Unnamed Gulch on Forest Road 189. 24 Jul 2024. (Undist.).

Agoseris aurantiaca (Hooker) Greene var. purpurea (A. Gray) Cronquist.  Orange-Flower Goat-Chicory.
2875, West Tennessee Creek. Along an old, closed forest road on the north side of West Tennessee Creek, 770 m. southeast of Lily Lake, 16.0 km. north northwest of Leadville. Open ground, nine plants seen, not showy, easy to overlook. Distances measured from GNIS point features. 19 Jul 2022. (KHD00078235^‡).

Agoseris glauca (Pursh) Raf. var. dasycephala (Torr. & A. Gray) Jeps.  (Syn: A. pubescens Rydb. ) Pale Goat-Chicory.
3116, Unnamed Gulch on Forest Road 189. Along Forest Road 189, about 1 km. east of County Road 18 “East Tennessee Road,” 5.69 km. (geodesic) north northwest of the GNIS location of Leadville. Between the road and the creek to the south, open shrubland with Artemisia tridentata, Eriogonum umbellatum, and Dasophora fritucosa. 19 Jul 2023. (Undist.).

Agoseris glauca (Pursh) Raf. var. glauca.  Pale Goat-Chicory.
631, Sagehen Meadow. South side of meadow. 5 Jul 2010. (CAS1120830^‡, UC).

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.
1101, Mount Galbraith Park. Small saddle on ridge, 40 m north of Nightbird Gulch Trail. 2.3 km northwest of the GNIS location of Golden. 3 May 2015. (JCOS s.n., KHD56936^‡).
2295, Apex Park - Northern Parcel. Northernmost quadrant of the parcel, north side of Deadman Gulch, right at the base of the Front Range scarp, 4.06 km. south of the GNIS location of Golden. Also seen or collected here: Juniperus scopulorum, Oenothera suffrutescens, Linaria dalmatica, and Cynoglossum officinale. 26 May 2020. (JCOS s.n., KHD00073450^‡, OBI149342^‡, UCR).
2926, Eagle Ridge. 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. Nearly flat soil along top of hogback, with Helianthus pumilis, Cercocarpus montanus, Penstemon virens, Alyssum simplex, Erodium cicutarium, and Bromus tectorum. 28 May 2023. (COLO, CS, CAS).

Ambrosia acanthicarpa Hook.  Flat-Spine Burr-Ragweed.
2908, DeLong Park (City of Golden). In planted native grass beds, along 23rd Street, opposite Vernon Drive, 1.72 km. southeast of the GNIS location of Golden. Not previously collected in or near Golden; unclear whether this Ambrosia was previously here, brought in with the soil amendment, or was a contaminant in the seed mix. DeLong Park was a private residence that was left fallow for a number of years, then converted to a city park in 2021-2022. Possibly a waif. 18 Aug 2022. (KHD00078703^‡).

Ambrosia dumosa (A. Gray) W. W. Payne.  (Syn: Franseria d. A. Gray ) White Bur-Sage, Burroweed.
1571, Shadow Valley. On the now closed road to Kingston Wash, 12.6 miles north on Cima Road, Kingston Road, and then Excelsior Mine Road from the intersection of US Interstate 15 and Cima Road, then 0.4 miles west to the gate at the Kingston Range Wilderness. Location of my collections 1569 to 1574. 18 Apr 2017. (COLO02348803^‡, CS, EIU, REGIS, UC2080702^‡).

Ambrosia eriocentra (A. Gray) Payne.  Wooly Bur-Sage.
30, Lobo Point. In washes with Prunus fasciculata. Common. . (Zzyzx s.n.).
178, Lobo Point. On valley floor, 2 km WNW of Hole-in-the-Wall. In granite sand washes. . (UC(TAS), Zzyzx s.n.).

Ambrosia psilostachya DC.  Western Ragweed.
1062, North Table Mountain Park. South slopes of North Table Mountain, just off the Golden Cliffs Trail, and just a little below the basalt cliffs, 1.5 km north northeast of the GNIS location of Golden. 29 Aug 2014. (CAS, UC2045777^‡).
1068, North Table Mountain Park. Near the south rim of North Table Mountain, accessed by way of the Golden Cliffs Trail, 1.5 km north northwest of the GNIS location of Golden. Rocky slope with little soil development near rim of mesa. 8 Oct 2014. (JCOS s.n., OBI82138^‡, UCR266095^‡).
1069, South Table Mountain. West side of South Table Mountain, along south loop of Lubahn Trail, 1.17 km east southeast of the GNIS location of Golden. 16 Oct 2014. (OBI82121^‡).
1748, North Washington Open Space. 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 sector, just west of the mowed area, among smooth brome. 31 Aug 2017. (EIU, KHD00065354^‡).
1763, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 1.7 mi. west on Colorado Highway 72 from Colorado Highway 93, 1.6 mi. north on Plainview Road, then 35 meters southwest on the slope above the road. 1 Sep 2017. (CDA0052332^‡, JCOS s.n., KHD00065167^‡).
2916, DeLong Park (City of Golden). Hydroseeded “native” area, north corner of park on 23rd Street opposite Table Drive, 1.74 km. southeast of the GNIS location of Golden. Common in all open spaces of Golden including nearby slopes of South Table Mountain; unclear whether this plant was previously here, brought in with the soil amendment, or was a contaminant in the seed mix. DeLong Park was a private residence that was left fallow for a number of years, then converted to a city park in 2021-2022. 15 Sep 2022. (Akure, CS, REGIS, COLO).
3220, Schweich Hill. Top of hill, center of parcel, 1.77 km. (geodesic) north northwest of the GNIS location of Golden. Southwest aspect, top of hill, gravel-covered upturned Laramie and Arapahoe Formations. Other collections identify this location as “North Washington Open Space.” 12 Sep 2023. (CAS, COLO, UCR).
3223, Colorado School of Mines Survey Field. Mixed grass prairie, highest Great Plains at the Rocky Mountain Front Range scarp, northwest corner of the Survey Field, 2.02 km. southwest of the GNIS location of Golden. Common plant of the plains of Colorado, especially up against the Front Range, also found at lower elevations on the west slope. 17 Sep 2023. (CS, CDA).
3224, Colorado School of Mines Survey Field. Mixed grass prairie, highest Great Plains at the Rocky Mountain Front Range scarp, northwest corner of the Survey Field, 2.02 km. southwest of the GNIS location of Golden. Common plant of the plains of Colorado, especially up against the Front Range, also found at lower elevations on the west slope. 17 Sep 2023. (EIU, CofG).

Ambrosia salsola (A. Gray) Strother & B. G. Baldwin.  (Syn: Hymenoclea salsola Torr. & A. Gray ) Cheesebush.
333, Mesquite Mountains. In Creosote Bush scrub, just west of the Winters Pass Hills, on Kingston Road, climbing to Winters Pass in the Mesquite Mountains. 20 April 2004. (UC1953377^‡).
1576, Shadow Valley. Along Kingston Road, 13.4 miles north of US Interstate 15 on Kingston Road, and 0.9 miles northeast of the intersection of Kingston Road and Excelsior Mine Road. Also collected here, Coll. No. 1575, Yucca schidigera. 18 Apr 2017. (CDA0050038^‡, COLO02348894^‡, CS, EIU036412^‡, REGIS).

Ambrosia salsola (Torr. & A. Gray) Strother & B. G. Baldwin var. salsola.  (Syn: Hymenoclea salsola Torr. & A. Gray var. salsola ) Cheese Bush.
2.3, Woods Mountains. in "Woods Wash," i.e., that portion of Black Canyon Wash on the south side of the Woods Mountains (Insufficient material for voucher.) 16 Apr 1993.

Ambrosia tomentosa Nutt.  Skeleton-Leaf Bursage.
3067, Guy Gulch. Just southeast of a concrete structure, across County Road 70 from the Centennial Ranch house, 2.43 km. south of Mount Tom, 12.2 km. west northwest of the GNIS location of Golden. Also collected nearby: Astragalus flexuosus, Silene latifolia, and Dracocephalum parviflorum. 12 Jul 2023. (CS, OBI, KHD ^‡, JCOS).

Ambrosia trifida L.  (Syn: A. trifida L. var. trifida ) Giant Ragweed.
3202, Golden History Park. West end of Golden History Park, at the western entrance gate, 395 m. west of the GNIS location of Golden. Most likely native to Golden, but found in an area of planted, non-native, vegetation. 29 Aug 2023. (CDA, CS, KHD ^‡).

Anaphalis margaritacea (L.) Bentham & Hooker.  Western Pearly Everlasting.
2388, Apex Park - Northern Parcel. Near top of initial Rocky Mountain Front Range scarp, on a ridge overlooking an unnamed gulch to the north, about center of Apex Park - North, 4.84 km. south of the GNIS location of Golden Mixed foothills shrubland, just below the ponderosa pines, also collected nearby: Claytonia rosea, Ceanothus fendleri, and Eriogonum umbellatum var ramulosum. 17 Jul 2020. (JCOS s.n.).
2657, Bull Gulch. Lippincott Ranch, crossed west to east by Bull Gulch, 72 m. west from the eastern boundary, 1.35 km. north northwest of the main gate, and 23.0 km. north northwest of the GNIS location of Golden. Additional colonies seen further up the gulch. South bank of the gulch, in an area not scoured out in the floods of September 2013. Lippincott Ranch is jointly owned by City of Boulder Open Space and Mountain Parks and Jefferson County Open Space. 7 Aug 2021. (CIBO, JCOS, KHD00075627^‡).
2725, Brumley. Sandy abandoned oxbow of the North Fork of Lake Creek, about 145 m. north of the Sno-Tel station road turnoff from the highway, about 11 road miles generally west on Colorado Highway 82 from the town of Twin Lakes, 175 km. southwest of Golden. Older part of the bar with a little more vegetation. Brumley was a stage stop on the route across Independence Pass. 18 Aug 2021. (UCR, COLO2706281^‡, KHD00076203^‡, OBI183786^‡).
2784, Windy Saddle Park. Southeast corner of Windy Saddle Park, about 480 m. northeast of, and downslope from, the Buffalo Bill Museum, and 3.30 km. southwest of the GNIS location of Golden. Sunny spot at edge of Douglas fir forest, also seen here: Anemone patens, Amelanchier alnifolia, and Viola canadensis. 17 May 2022. (CS, CAS).
2972, Guy Gulch. Steep slope above Guy Gulch, southwest side of the creek and County Road 70, 380 m. south southeast of the ranch house, 15.6 km. (planar) northwest of the GNIS location of Golden. Very steep slope among Douglas fir. 14 Jun 2023. (EIU, OBI).
3043.1, Guy Gulch. Top of very steep slope above creek, 90 m. southwest of County Road 70, 1.09 km. (geodesic) northwest of Centennial Ranch house, 13.3 km. (geodesic) northwest of the GNIS location of Golden. 3 Jul 2023. (Deferred).

Anisocoma acaulis Torr. & A. Gray.  Scale Bud.
824, Sagehen Meadow. Disturbed places near residence. 31 May 2012. (CAS1149127^‡, UC2015274^‡).
1151, Big Sand Flat. Northwest side of CA Hwy 120, near center of Big Sand Flat and intersection of CA Hwy 120 and Forest Road 01S04 “Pilot Springs Road.” Also found at this location, Astragalus monoensis. 22 Jun 2015. (CS, OBI82189^‡, RENO87068^‡, UC2046090^‡, UCR265724^‡).

Antennaria .  Pussytoes.
3328, Brumley. 23 Jul 2024. (Undist.).

Antennaria microphylla Rydb.  Littleleaf Pussytoes.
3150, Guy Gulch. North of Guy Gulch, accessed by a ranch road off of Pyrenees Lane, meadow 35 m. east northeast of the line shack, 1.08 km. west southwest of Mt. Tom, 13.7 km. (geodesic) northwest of the GNIS location of Golden. East side of meadow, edge of forest with aspen, spruce and ponderosa pine, growing with Antennaria parviflora. 26 Jul 2023. (KHD00080565^‡, JCOS).

Antennaria neglecta Greene.  Field Pussy-Toes.
2834, Lippincott Ranch (North). In shade along the north fork of Spring Brook, 2.56 km. north northwest of the main gate, 2.36 km. south southwest of the GNIS location of Eldorado Springs. Lippincott Ranch is jointly owned by City of Boulder Open Space and Mountain Parks and Jefferson County Open Space. 2 Jul 2022. (CIBO, JCOS, KHD00078899^‡).

Antennaria parvifolia Nutt.  Small-Leaf Pussytoes.
1128, Mount Falcon Park. East-facing, grassy slope of small unnamed hill, 530 m north northwest of Mt. Falcon, approximately 13.5 km south of Golden. 1 Jun 2015. (JCOS s.n., KHD56951^‡, UCR265986^‡).
1909, Little Scraggy Peak. Buffalo Creek Recreation Area, northeast slopes of Little Scraggy Peak, 1.05 km. southwest of the intersection of County Roads 126 and 550, 46.5 km. south of the GNIS location of Golden. 31 May 2018. (CAS, KHD00069228^‡, OBI162802^‡).
2049, Colorado School of Mines Survey Field. Highest Great Plains at the Rocky Mountain Front Range, southeast portion of Survey Field, on a terrace above a small unnamed stream tributary to Deadman Gulch (Kinney Run), 2.9 km. south of the GNIS location of Golden 2 Jun 2019. (CDA0052288^‡, COLO2434785^‡, KHD00072803^‡, UC).
2282, Apex Park - Northern Parcel. Along the eastern edge of the Apex Park - North parcel, open, north-facing aspect, 4.73 km. south of the GNIS location of Golden. Mixed grass and foothill shrubland, near a thicket of Prunus americana and Rhus trilobata; Senecio integerrimus and Cynoglossum officinale also here. 18 May 2020. (CS, JCOS s.n., KHD00073453^‡, REGIS).
2466, Hankins Gulch. Slopes above Hankins Gulch near its mouth on Goose Creek, area burned by Hayman fire of 2002, 86 km. south-southwest of Golden. Downed ponderosa pines, with Packera werneriifolia, E. compositus, Clematis columbiana, Cymopterus anisatus, and Arctostaphylos uva-ursi. 23 May 2021. (Golden, OBI183662^‡).
2961, Guy Gulch. Southwest side of the creek and County Road 70, 200 m. southwest of the ranch house, 15.8 km. northwest of the GNIS location of Golden. Lowest northeast-facing hill slope, edge of forest. 14 Jun 2023. (Golden).

Antennaria rosea Greene.  Rosy Pussytoes.
1083, Ranson/Edwards Homestead Open Space Park. 2.1 miles on Plainview Road north of Colorado State Highway 72, then 115 m west. Growing in patches among openings in a grassy, formerly burned open ponderosa pine woodland. 25 Apr 2015. (JCOS s.n., KHD56958^‡, UC2045771^‡).
2529, Morrison Creek. Moist forest floor in the middle of an old road next to Morrison Creek, just north of the Colorado Trail, 0.78 km. south of NF Road 550, 61.5 km. south of the GNIS location of Golden. 23 Jun 2021. (CAS, OBI183423^‡, UCR ^‡).
2591, North Fork West Tennessee Creek. About 300 m. east of Lily Lake, along Pike-San Isabel Forest Road 131, 2.6 road miles west of US Highway 24, 140 km. southwest of the GNIS location of Golden. Dry rocky opening in lodgepole pine forest. Also collected here: Eriogonum umbellatum var. majus, Androsace septentrionalis, Collomia linearis, and Solidago multiradiata. 13 Jul 2021. (CS, EIU, COLO2704260^‡, CDA).
2947, Guy Gulch. Douglas Mountain Study Area, area along Guy Gulch, about 210 m. above the county road, north side of Jefferson County Road 70 and near western boundary, 17.8 km. northwest of the GNIS location of Golden. 6 Jun 2023. (REGIS, JCOS, KHD ^‡).
2960, Guy Gulch. Southwest side of the creek and County Road 70, 180 m. southwest of the ranch house, 15.9 km. northwest of the GNIS location of Golden. Lowest northeast-facing hill slope, edge of forest. 14 Jun 2023. (CAS, OBI, UCR, JCOS).
3101.1, West Tennessee Creek. Edge of forest on west-facing slope above West Tennessee Creek, 588 m. (geodesic) southeast of Lily Lake, 12.3 km. (geodesic) north northwest of Leadville. Near base of slope above former meander of West Tennessee Creek, with Artemisia borealis, Leptosiphon nuttallii and Arenaria congesta. Coordinates estimated from GoogleEarth. Distances measured from GNIS point features. 18 Jul 2023. (CS).

Arctium minus Bernh.  Lesser Burdock. Weed: CO, CO DofA, List: C.
2124.1, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, west 1.7 mi. on CO Hwy 72 from CO Hwy 93, generally north 1.0 mi. on Plainview Road, then 365 m. east into a thicket, primarily of Prunus virginiana, 19.6 km. north northeast of the GNIS location of Golden. Collected with Cynoglossum officinale. Vegetative parts only, collections with flower or fruit typically made in August through October. Colorado Noxious Weed List C. 6 Jul 2019. (JCOS s.n., KHD00072728^‡).
2425, Deadman Gulch. 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. Also seen in several other places along Deadman Gulch. Colorado Noxious Weed List C. 17 Aug 2020. (CDA0053776^‡, COLO2433811^‡, CS, KHD00073455^‡).
3302, Coal Creek Canyon Study Area, Lacey Parcel. mouth of tributary creek 19 Jul 2024. (Undist.).

Arnica chamissonis Less.  (Syn: A. chamissonis Less. ssp. foliosa (Nutt.) Maguire ) Chamisso Leopardbane.
510, Bohler Canyon. Wet meadow along the creek in Bohler Canyon, about 2.0 mi (3.1 km) by air west of US Highway 395, in grasses and sedges at creekside. 2 Aug 2007. (CAS, UC, UCR250028^‡).

Arnica cordifolia Hook.  Heart-Leaf Leopardbane.
2530, Morrison Creek. Moist shaded forest floor between an old road and Morrison Creek, north of the Colorado Trail, 0.77 km. south of NF Road 550, 61.5 km. south of the GNIS location of Golden. Also collected here: Antennaria rosea in the middle of the road. 23 Jun 2021. (CAS, KHD00075524^‡, OBI183422^‡, UCR ^‡).
2579, Lily Lake. East side of Lily Lake, on a low gravely ridge that is probably a lateral or medial moraine, near the end of the Pike-San Isabel Forest Road 131, 2.8 road miles west of US Highway 24, 140 km. southwest of the GNIS location of Golden. Several involucres partially eaten. 12 Jul 2021. (CDA, UCR, KHD00075209^‡, OBI183719^‡).
3029, Guy Gulch. Just inside the mouth of a small gulch tributary to Guy Gulch, southwest side of County Road 70, 1.19 km. northwest of Centennial Ranch house, 13.4 km. (geodesic) northwest of the GNIS location of Golden. More seen further up the gulch. 3 Jul 2023. (Golden).
3252, Coal Creek Canyon Study Area, Lacey Parcel. Open Douglas fir forest, with Acer glabrum. 10 Jun 2024. (Undist.).

Arnica fulgens Pursh.  Shining Leopardbane.
1119, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 15.2 km north northeast of Golden, 1.3 miles north of CO State Highway 72 on Plainview Road, 110 m. east of Plainview Road. Very wet, running water among grasses and sedges. 28 May 2015. (JCOS s.n., KHD56970^‡, UCR265985^‡).
1371, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 1.7 mi. west on CO Hwy 72 from CO Hwy 93, then 1.4 mi. north on Plainview Road. 15.8 km. north northwest of the GNIS location of Golden. Moist east-facing slope with deep grass. 29 May 2016. (CAS, COLO02348472^‡, CS, EIU, JCOS s.n., KHD00063982^‡, OBI83169^‡).
1871, Tin Cup Ridge. Near the top of Tin Cup Ridge, the northward extension of Dinosaur Ridge into Golden,4.57 km. south southeast of the GNIS location of Golden. Amid trees and shrubs, east exposure. 23 May 2018. (CAS, CDA0052354^‡, JCOS s.n., KHD00069227^‡, UC).
2038, Lippincott Ranch. Jointly owned by City of Boulder OSMP and Jefferson County Open Space, south of Bull Gulch approximate centroid of parcel, 22.4 km. north northwest of the GNIS location of Golden. Open prairie in small saddle. 26 May 2019. (CIBO, JCOS s.n., KHD00071103^‡, REGIS).
2080, Lippincott Ranch. Narrows of the parcel between central and southeast portions, 22 km. north northwest of the GNIS location of Golden. With mixed grasses and forbs in a gently sloped, open ponderosa pine woodland. 17 Jun 2019. (CAS, CDA0052291^‡, CIBO, COLO2433498^‡, CS, OBI183230^‡, UC, UCR).

Arnica mollis Hook.  Cordilleran Leopardbane.
2006, North Fork West Tennessee Creek. Tennesee Creek Basin, 8.2 mi. north of Leadville, then 2.4 mi. generally west on County Road 9 and Forest Road 131, not quite to Lily Lake, 12.5 km. north northeast of the GNIS location of Leadville. Mixed pine forest and abandoned beaver dams. 25 Jul 2018. (KHD00069229^‡, OBI148133^‡, UCR ^‡).
2708, North Fork West Tennessee Creek. About 250 m. northeast of Lily Lake, near the current end of Pike-San Isabel Forest Road 131, 2.6 road miles west of US Highway 24, 140 km. southwest of the GNIS location of Golden. Subalpine forest beside the creek, deep shade. 17 Aug 2021. (CAS, UC, COLO2707313^‡, CDA).

Arnica parryi A. Gray.  Nodding Leopardbane.
2010, North Fork West Tennessee Creek. Tennesee Creek Basin, 8.2 mi. north of Leadville, then 2.4 mi. generally west on County Road 9 and Forest Road 131, not quite to Lily Lake, 12.5 km. north northeast of the GNIS location of Leadville. Mixed pine forest and abandoned beaver dams. 25 Jul 2018. (COLO02347631^‡, CS, KHD00069230^‡, OBI158421^‡, UC, UCR ^‡).
2706, North Fork West Tennessee Creek. About 125 m. east of Lily Lake, at the current end of Pike-San Isabel Forest Road 131, 2.6 road miles west of US Highway 24, 140 km. southwest of the GNIS location of Golden. Subalpine forest beside road; soil is very likely glacial till. 17 Aug 2021. (CAS, CDA, EIU, KHD00075281^‡).

Arnica sororia Greene.  Twin Leopardbane.
692, Sagehen Meadow. 26 Jul 2010. (CAS1131465^‡, UC1980394^‡).

Artemisia absinthium L.  Common Wormwood. Weed: CO, CO DofA, List: B.
2917, 407 Garden Street. On the shoulder of the road at 407 Garden Street, 1.39 km. north of the GNIS location of Golden. Also here: Artemisia ludoviciana, Cirsium arvensis. Ratibida columnifera, Convolvulus arvensis, Linum lewisii, and Elymus repens. Naturalized at edge of residential street, more in nearby yard, but not planted by this homeowner. All removed by homeowner following identification. Colorado Noxious Weed List B. EDDMaps: 10688546. 21 Sep 2022. (CDA, COLO, CS, KHD00079747^‡).

Artemisia borealis Pall. ssp. borealis.  (Syn: A. campestris L. var. purshii (Besser ex Hook.) Cronquist , Oligosporus groenlandicus (Hornemann) Á. Löve & D. Löve ) Boreal Wormwood.
2881, West Tennessee Creek. Edge of forest on west-facing slope above West Tennessee Creek, 870 m. southeast of Lily Lake, 15.9 km. north northwest of Leadville. Dry gravelly slope under a pine. Distances measured from GNIS point features. 19 Jul 2022. (COLO, KHD00079102^‡, OBI183825^‡).
3101, West Tennessee Creek. Edge of forest on west-facing slope above West Tennessee Creek, 588 m. (geodesic) southeast of Lily Lake, 12.3 km. (geodesic) north northwest of Leadville. Near base of slope above former meander of West Tennessee Creek, with Leptosiphon nuttallii and Arenaria congesta. Coordinates estimated from GoogleEarth. Distances measured from GNIS point features. 18 Jul 2023. (CAS, CS, UCR).

Artemisia campestris L.  Field Sagewort.
1767, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 1.7 mi. west on Colorado Highway 72 from Colorado Highway 93, 1.6 mi. north on Plainview Road, then 250 meters southwest on the slope above the road. Rocky alluvial ridge. Somewhat ambiguous as to variety, but most like var. pacifica if infraspecific names are to be applied. 1 Sep 2017. (CAS, JCOS s.n., KHD00065169^‡, UCR ^‡).

Artemisia campestris L. ssp. pacifica (Nutt.) Peck.  Field Sagewort.
2206, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 1.6 mi. west on CO Hwy 72 from CO Hwy 93, 1.1 mi. north on Plainview Road, then 500 m. west on a small ridge, 19.4 km. north northwest of the GNIS location of Golden. Fairly dry, exposed prairie on small ridge between watercourses. Also observed/collected nearby: Toxicodendron rydbergii and Solidago nana. Same as Coll. No. 2207. 27 Aug 2019. (JCOS s.n., KHD00074284^‡).
2207, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 1.6 mi. west on CO Hwy 72 from CO Hwy 93, 1.1 mi. north on Plainview Road, then 620 m. west on a small ridge, 19.4 km. north northwest of the GNIS location of Golden. Fairly dry, exposed prairie on small ridge between watercourses. Also observed/collected nearby: Toxicodendron rydbergii and Solidago nana. Same as Coll. No. 2206. 27 Aug 2019. (COLO2434561^‡, OBI186024^‡, REGIS).

Artemisia cana Pursh ssp. bolanderi (A. Gray) G. H. Ward.  Silver Sagebrush.
716, Sagehen Meadow. On the drying edges of the wet meadow. 28 Aug 2010. (CAS1131424^‡, UC1980417^‡).

Artemisia dracunculus L.  (Syn: Oligosporus dracunculus (L.) Poljakov ssp. glaucis (Pall. ex Willd.) A. Löve & D. Löve ) Tarragon, Dragon Wort.
1554, North Table Mountain. 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. 1 Sep 2016. (EIU, JCOS s.n., KHD00063997^‡, OBI83374^‡, UC).
1754, North Washington Open Space. 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. Eastern slope adjacent to social trail over the top of the hill. 31 Aug 2017. (KHD00065159^‡, UCR289253^‡).
2386, Apex Park - Northern Parcel. Near the top of the initial Rocky Mountain Front Range scarp, southern half of the restricted area, 4.93 km. south of the GNIS location of Golden. Mixed foothills shrubland, with a few Rocky Mountain junipers, ponderosa pines are a little higher, also collected here: Collinsia parviflora and Andropogon gerardii. 17 Jul 2020. (CDA0053764^‡, COLO2434447^‡, CS, REGIS).
2431.2, Apex Park - Northern Parcel. East-central corner of park where multiple unnamed gulches join before flowing through Stonebridge HOA, small ridge between gulches, 4.47 km. south of the GNIS location of Golden. Also seen or collected here: Eriogonum effusum, Ericameria nauseosa var. graveolens, Senecio spartioides (in bud, no flowers), Solidago missouriensis, and Xanthisma spinulosum. 19 Aug 2020. (JCOS s.n., KHD00073461^‡).

Artemisia frigida Willd.  Prairie Sagewort.
1067, North Table Mountain Park. Near the south rim of North Table Mountain, accessed by way of the Golden Cliffs Trail, 1.5 km north northeast of the GNIS location of Golden. Rocky slope with little soil development near rim of mesa, growing with Brickellia. 9 Oct 2014. (CAS, UC2045775^‡, UCR266094^‡).
2695, Salt Creek. Small valley between two ridges, just north of Salt Creek and Pike-San Isabel National Forest Road 435 "Salt Creek Road," 3.1 mi. by road west of US Highway 285, 145 km. southwest of the GNIS location of Golden 16 Aug 2021. (KHD00075276^‡, OBI183397^‡).

Artemisia ludoviciana Nutt.  Silver Wormwood.
31, Lobo Point. In woodland with Pinus monophylla and Rhus trilobata. Uncommon. . (Zzyzx s.n.).
159, Lobo Point. 3 km west-northwest of Hole-in-the-Wall. . (UC(TAS), Zzyzx s.n.).
1281, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 15.2 km north northeast of Golden, 1.3 miles north of CO State Highway 72 on Plainview Road, then 535 m. west of Plainview Road. In a grassy low spot away from established drainage. 28 Aug 2015. (CAS, EIU, JCOS s.n., KHD00062048^‡, OBI83256^‡, UC, UCR267478^‡).
1753, North Washington Open Space. 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. Var. ludoviciana if infraspecific names are to be applied. 31 Aug 2017. (CS, KHD00065158^‡).

Artemisia ludoviciana Nutt. ssp. incompta (Nutt.) D. D. Keck.  White Sagebrush.
2688, Salt Creek. South-facing hillside along Salt Creek and Pike-San Isabel National Forest Road 435 "Salt Creek Road," 3.2 mi. by road west of US Highway 285, 145 km. southwest of the GNIS location of Golden. Open hillside with ponderosa pines, collected nearby: Hymenoxys richardsonii var. floribunda, and Muhlenbergia montana. 16 Aug 2021. (DEMO, UCR, KHD00075274^‡, OBI183402^‡).
3190, Guy Gulch. Southwest side of County Road 70 and the gulch, 660 m. northwest of Centennial Ranch, 12.8 km. northwest of the GNIS location of Golden. Sunny southeast-facing rocky slope, north ridge above small gulch tributary to Guy Gulch, also collected here: Symphyotrichum porteri, Allium cernuum, Muhlenbergia montana, and Thinopyrum intermedium. 31 Jul 2023. (COLO, CS, KHD ^‡, JCOS).

Artemisia ludoviciana Nutt. ssp. ludoviciana.  (Syn: A. brittonii Rydb. ) White Sagebrush.
898, Rattlesnake Gulch. Along the watercourse at a cabin, about 300 m east of the GNIS location of Mono Diggings, 10.6 miles by road north of Lee Vining. 24 Aug 2012. (CAS1157591^‡, UC).
2694, Salt Creek. South-facing hillside along Salt Creek and Pike-San Isabel National Forest Road 435 "Salt Creek Road," 3.2 mi. by road west of US Highway 285, 145 km. southwest of the GNIS location of Golden. Open hillside with ponderosa pines; collected nearby: Erigeron subtrinervis, Solidago missouriensis, Lithospermum multiflorum, and Elymus elymoides. Compare with Coll. No. 2688, determined var. incompta, collected about 195 m. south and down the slope. 16 Aug 2021. (UCR, COLO2691848^‡, KHD00075275^‡, OBI183398^‡).
3191, Colorado School of Mines Survey Field. Southeast corner of Survey Field, 2.45 km. (geodesic) south of the GNIS location of Golden Highest mixed grass prairie near Rocky Mountain Front Range scarp, also nearby: Asclepias pumila, Ambrosia psilostachya, Artemisia dracunculus, Liatris punctata, and Evolvulus nuttallianus. 27 Aug 2023. (COLO, CS, OBI, KHD).
3219, Schweich Hill. 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. 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.” 12 Sep 2023. (CAS, CDA, UCR, OBI).

Artemisia tridentata Nutt.  Big Sagebrush.
3344, Unnamed Gulch on Forest Road 189. patch among willows and aspen 24 Jul 2024. (Undist.).

Baccharis sergiloides A. Gray.  Squaw Waterweed.
32, Lobo Point. In wash near Lobo Point. Uncommon. . (UC(TAS), Zzyzx s.n.).
103, Wild Horse Mesa. NWHM, at water tank. 29 4 1997. (UC(TAS)).

Bahiopsis parishii (Greene) E. E. Schill. & Panero.  (Syn: Viguiera parishii Greene ) Parish's Golden Eye.
246, Lobo Point. In the watercourse on the south side of the landslide on the east side of Lobo Point, about 1.7 miles west northwest of Hole-in-the-Wall, and 9 miles north northeast of Mitchell Caverns. Common, many heads had no ray flowers. 5 June 2000. (Golden, Zzyzx s.n.).

Baileya multiradiata Harv. & A. Gray ex Torr.  Desert Marigold.
291, Wild Horse Mesa. Lower slopes of the north face of Wild Horse Mesa, 3.3 miles west northwest of Hole-in-the-Wall, and 8.3 miles north northeast of Mitchell Caverns. 26 May 2001. (Golden, Zzyzx s.n.).
337.1, Mesquite Mountains. In Creosote Bush scrub, just west of the Winters Pass Hills, on Kingston Road, climbing to Winters Pass in the Mesquite Mountains. 20 April 2004. (?, UCR248650^‡).

Balsamorhiza sagittata (Pursh) Nutt.  Arrow-Leaf Balsamroot.
782, Copper Mountain. In a limestone canyon of Copper Mountain, just below the mine tunnel, 1.1 miles west of the intersection of US Highway 395 and Mill Creek Powerhouse Road. 22 Jun 2011. (CAS1131360^‡, UC1980465^‡).
956, Pumice Valley. On Forest Road 01N17 “Farrington Siphon,” between the Sawmill Canyon and Bloody Canyon moraines, 6.3 miles by road south of Lee Vining, from below the aqueduct to the tops of the moraines. 22 May 2013. (CAS1161742^‡, UC, UCR250023^‡).
1109, Tin Cup Ridge. In grasses and shrubs high on the east side of Tin Cup Ridge, a northward extension of Dakota Ridge into Golden, 4.9 km south southeast of the GNIS location of Golden. East across US Highway 40 from the Peabody Museum dig at Magic Mountain, which was extensively collected by E. H. Brunquist (1959). 14 May 2015. (CAS, KHD56904^‡, OBI82132^‡, UC, UCR266092^‡).
2252, Tin Cup Ridge. Lower slopes of Tin Cup Ridge, the northward extension of Dinosaur Ridge into Golden, a hogback at the base of the Rocky Mountain Front Range, 6.63 km. south of the GNIS location of Golden. Usually described as a western slope plant. Perhaps planted here. Regardless, it is naturalized and spreading, if not native. 30 Apr 2020. (CDA0053724^‡, COLO2433704^‡, CS198728^‡, JCOS s.n., REGISs.n.).

Bidens frondosa L.  Devil's Beggartick.
2202, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 19.4 km. north northwest of the GNIS location of Golden, 1.6 mi. west on CO Hwy 72 from CO Hwy 93, 0.9 mi. north on Plainview Road, then 290 m. west to a small reservoir. 27 Aug 2019. (JCOS s.n., KHD00070528^‡, OBI186030^‡).

Brickellia californica (Torrey & A. Gray) A. Gray.  California Brickelbush.
121, Lobo Point. Lobo Point Camp, 2.6 km northwest of Hole-in-the-Wall, 14.7 km northeast of Mitchell Caverns. Shaded areas alongside washes. Uncommon in the Lobo Point Camp. . (Zzyzx s.n.).
148, Lobo Point. 3 km west northwest of Hole-in-the-Wall. . (UC(TAS), Zzyzx s.n.).
161, Lobo Point. 3 km west-northwest of Hole-in-the-Wall. Alongside washes. . (Zzyzx s.n.).
1546, North Table Mountain Park. Near top of south side of North Table Mountain, at the base of the lower set of basalt cliffs, 220 m. north of the Golden Cliffs trailhead, 1.5 km. north northeast of the GNIS location of Golden. 1 Sep 2016. (COLO02348654^‡, EIU, JCOS s.n., KHD00063965^‡, OBI83343^‡, UC).

Brickellia eupatorioides (L.) Shinners.  False Boneset.
1553, North Table Mountain Park. Top of North Table Mountain, adjacent to the North Table Loop, 285 m. north of the USBR monument designated “North Table,” 1.8 km. north of the GNIS location of Golden. Common in bed of ephemeral stream, in an upper portion of a watercourse draining southeast to Clear Creek through an unamed canyon. Many Eriogonum alatum at this location. 1 Sep 2016. (JCOS s.n., KHD00063999^‡).
1758, North Washington Open Space. 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. On a bank that was formerly cut, unknown whether it was intentionally regevetated or not. 31 Aug 2017. (CAS, KHD00065163^‡, UCR ^‡).
2740, Apex Park - Northern Parcel. South-facing slope overlooking an unnamed gulch draining through Stonebridge HOA, very near the parcel boundary, 4.36 km. south of the GNIS location of Golden. 1 Sep 2021. (Golden, OBI183782^‡).
3218, Schweich Hill. 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. 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.” 12 Sep 2023. (COLO, CS, EIU, OBI).

Brickellia grandiflora (Hook.) Nutt.  Tasselflower Brickellbush.
2732, Apex Gulch. Along the Apex Gulch Trail, 1.54 km. west of the Apex Gulch trailhead, 6.42 km south of the GNIS location of Golden, Right beside the trail, none seen on slopes above or below. Also observed on the trail 30 m. to the west. 25 Aug 2021. (CS, JCOS, KHD00075265^‡, OBI183783^‡).
2743, Lippincott Ranch. Southwest corner of the ranch, 1.11 km. west northwest of the main gate, 22.3 km. north northwest of the GNIS location of Golden. On loose rock of the embankment below the Union Pacific Railroad, in the partial shade of a cottonwood and rocky mountain maples. Lippincott Ranch is jointly owned by City of Boulder Open Space and Mountain Parks and Jefferson County Open Space. 7 Sep 2021. (CAS, CIBO, UCR, COLO2707321^‡, JCOS).

Carduus nutans L.  (Syn: Carduus nutans L. ssp. macrolepis (Peterman) Kazmi ) Nodding Plumeless Thistle. Weed: CO, CO DofA, List: B.
1517, Ranson/Edwards Homestead Open Space Park. Northern part of open space, 1.6 mi. west on CO Highway 72 from CO Highway 93, north 1.9 mi. on Plainview Road, then 560 m. downhill to northeast; 16.3 km. north northwest of the GNIS location of Golden. Northwest-facing slope above ephemeral stream. Introduced. Colorado Noxious Weed List B. 24 Jul 2016. (EIU, JCOS s.n., KHD00063455^‡, OBI83332^‡).
1711, North Washington Open Space. 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. Colorado Noxious Weed List B. 14 Jul 2017. (KHD00065333^‡, UCR ^‡).
1968, 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. 6 Jul 2018. (COLO02348563^‡, KHD00069210^‡, OBI170768^‡, UC).
2551, Apex Park - Northern Parcel. Lower slopes of the Front Range foothills, northeast quadrant of Apex Park, 4.45 km. south of the GNIS location of Golden. Grasslands below foothills scrub, collected nearby: Helianthus pumilus, Heterotheca villosa, Sphaeralcea coccinea, Linaria dalmatica, and Thinopyrum intermedium. Colorado Noxious Weed List B. 7 Jul 2021. (CAS, CDA, CS, UC, UCR, COLO2706539^‡, JCOS).

Centaurea calcitrapa L.  Purple Star-Thistle.
190, Sibley Volcanic Reqional Preserve. At junction of old roads in saddle along ridge. California Department of Food and Agriculture Noxious Weed List: B. 27 November 1999. (UC1953379^‡).

Centaurea diffusa Lam.  (Syn: Acosta diffusa (Lam.) Soja' k ) Diffuse Knapweed. Weed: CA, CAL-IPC, List: Moderate. CO, CO DofA, List: B.
1233, North Table Mountain Park. Northern portion of North Table Mountain, 205 m east of radio tower, 3.3 km north northeast of the GNIS location of Golden. Colorado Noxious Weed List B species. 20 Jul 2015. (CDA0050040^‡, JCOS s.n., KHD 00062051^‡, UC, UCR267458^‡).
2676.1, Tin Cup Ridge. Lower part of the east base of the hogback locally called Tin Cup Ridge, the northward extension of Dinosaur Ridge into Golden, 6.3 km. south southeast of the GNIS location of Golden. One of three collections made here. This one has purple flowers; the others have white flowers. 10 Aug 2021. (CDA, CS, JCOS).
2676.2, Tin Cup Ridge. Lower part of the east base of the hogback locally called Tin Cup Ridge, the northward extension of Dinosaur Ridge into Golden, 6.3 km. south southeast of the GNIS location of Golden. One of three collections made here; most have white flowers, some have purple flowers. 10 Aug 2021. (CDA, CS, JCOS).
2676.3, Tin Cup Ridge. Lower part of the east base of the hogback locally called Tin Cup Ridge, the northward extension of Dinosaur Ridge into Golden, 6.3 km. south southeast of the GNIS location of Golden. One of three collections made here; most have white flowers, some have purple flowers. 10 Aug 2021. (CDA, CS, REGIS, JCOS).

Centaurea solstitialis L.  Yellow Star-Thistle. Weed: CA, CAL-IPC, priority: High, List: High. CO, CO DofA, List: A.
880, Mount Trashmore, Alameda. Adjacent to the short spur bicycle path that connects the Bay Farm Bicycle Bridge to Doolittle Drive. 10 Aug 2012. (CAS1157584^‡, CDA39240^‡, UC).

Centromadia pungens (Hook. & Arn.) Greene ssp. pungens.  (Syn: Centromadia maritima Greene ) Common Spikeweed.
878, Bay Farm Island, City of Alameda. Just east of the intersection of the bicycle bridge with the Veterans Court bicycle path. Gravelly side of bicycle path, subject to foot and bicycle traffic. Five plants seen in the immediate area. 5 Aug 2012. (CAS1157549^‡, UC).

Chaenactis carphoclinia A. Gray var. carphoclinia.  Pebble Pincushion.
348, Winters Pass. Winters Pass is on Kingston Road where it passes through the Mesquite Mountains. Plants were found on stony-mantled ground on the small hill just west of the pass. 20 April 2004. (UCR248652^‡).

Chaenactis douglasii (Hook.) Hook. & Arn. var. douglasii.  Douglas' Dustymaiden.
620, Adobe Hills Spillway. Growing in the fresh water sandstone at the spillway, 16.6 miles east of US Highway 395 on California Highway 167, then 8.0 miles southeast on Dobie Meadows Road. 29 Jun 2010. (OBI82216^‡, UCR262141^‡).
764.1, Mono Basin. Along Goat Ranch Road, 3.25 miles east northeast of the intersection of US Highway 395 and California Highway 167 (sometimes called Pole Line Road). With Pinyons (no Junipers), Sagebrush, Bitterbrush, and Ephedra, in the mixed sandy and rocky ground where the foot of the Bodie Hills meets the Mono Dunes. 19 Jun 2011. (CAS1131402^‡, UC1980481^‡).
829, Tioga Lodge. Granite outcrop surrounded by very sandy soil, likely a former shoreline or deltaic deposit from a high-stand of Mono Lake, above Tioga Lodge, along a powerline road, 2.8 miles north of Lee Vining. This area burned several years ago. 18 Jun 2012. (CAS1149310^‡, UC2015271^‡).
2562, Salt Creek. South-facing hillside along Salt Creek and Pike-San Isabel National Forest Road 435 "Salt Creek Road," 3.2 mi. by road west of US Highway 285, 145 km. southwest of the GNIS location of Golden. Open hillside with pines, also collected here: Oreocarya thyrsiflora, Penstemon barbatus, Gutierrezia sarothrae, and Muhlenbergia montana. 12 Jul 2021. (CS, COLO2706406^‡, KHD00075518^‡, OBI183412^‡).

Chaenactis fremontii A. Gray.  Desert Pincushion.
330, Shadow Valley. In Creosote Bush scrub, just west of the Winters Pass Hills, on Kingston Road, climbing to Winters Pass in the Mesquite Mountains. 20 April 2004. (?, CAS1157588^‡, UCR248613^‡).

Chaenactis glabriuscula DC. var. glabriuscula.  Yellow Pincushion.
122, Lobo Point. Lobo Point Camp, 2.6 km northwest of Hole-in-the-Wall, 14.7 km northeast of Mitchell Caverns. Uncommon in the Lobo Point Camp. 30 Apr 1997. (UC(TAS)).

Chrysothamnus depressus Nutt.  Longflower Rabbitbrush.
221, Wild Horse Mesa. 4 km west of Hole-in-the-Wall, 278 km northeast of Los Angeles, California. With Juniperus osteosperma, Pinus monophylla, Coleogyne ramosissima, and Eriogonum fasciculatum. Occasional in experimental plots of Swertia albomarginata, no flowers when collected. See also collection number 265. 27 April 2000. (UC(TAS), Zzyzx s.n.).
265, Wild Horse Mesa. North face of Wild Horse Mesa, 3ź miles west of Hole-in-the-Wall, 8 miles north northeast of Mitchell Caverns. North-facing lacustrine limestone slopes of the informally named Winkler Formation. 1 Sep 2000. (Golden, Zzyzx s.n.).
472.1, Pinto Mountain. 289 km northeast of Los Angeles, California. South slope of the mountain. 15 Oct 2005.

Chrysothamnus viscidiflorus (Hook.) Nutt. ssp. puberulus (D. C. Eaton) H. M. Hall & Clem.  Yellow Rabbitbrush.
887, Sagehen Meadow. North of the meadow, in sagebrush, just at the edge of the Jeffrey pines. 22 Aug 2012. (UC, UCR248618^‡).

Chrysothamnus viscidiflorus (Hook.) Nutt. ssp. viscidiflorus.  Yellow Rabbitbrush.
150, Black Canyon. West side of Black Canyon Road, near Holiman Well, 7.9 miles north of Hole-in-the-Wall, 2 miles south of Cedar Canyon Road. 3 Oct 1997. (Golden, Zzyzx s.n.).
705, Sagehen Meadow. North of the meadow and the house, on loose granitic sand slopes. 17 Aug 2010. (CAS1131416^‡, UC1980384^‡).

Cichorium intybus L.  Common Chicory.
1223, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 15.2 km north northeast of Golden, 1.3 miles north of CO State Highway 72 on Plainview Road, 70 m. west of Plainview Road. 16 Jul 2015. (JCOS s.n., KHD00062054^‡, UC).
3300, Coal Creek Canyon Study Area, Lacey Parcel. creek bottom 19 Jul 2024. (Undist.).

Cirsium arvense (L.) Scop.  (Syn: Breea arvensis (L.) Lessing ) Canada Thistle. Weed: CO, CO DofA, List: B.
1200, Colorado School of Mines Survey Field. Northern portion of the Survey Field, 2.1 km south southwest of the GNIS location of Golden. 12 Jul 2015. (CS, KHD00062053^‡, UC).
1512, Ranson/Edwards Homestead Open Space Park. Northern part of open space, 1.6 mi. west on CO Highway 72 from CO Highway 93, north 1.9 mi. on Plainview Road, then 80 m. northwest; 16.3 km. north northwest of the GNIS location of Golden. Mixed grasses and forbs, just below the ponderosa pine zone. Lightly grazed in 2016. Colorado Noxious Weed List B. 24 Jul 2016. (CDA0050044^‡, EIU028176^‡, JCOS s.n., KHD00063469^‡).
1685, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 1.7 miles west on CO Highway 72 from CO Highway 93, 1.4 miles north on Plainview Road, then 450 meters east northeast to the original homestead location. 28 Jun 2017. (JCOS s.n., KHD00065409^‡).
1701, North Washington Open Space. 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. East end of parcel amid a dense infestation of smooth brome. 14 Jul 2017. (KHD00065460^‡, UCR ^‡).
2407, Deadman Gulch. Near the junction of Deadman Gulch and Kinney Run, 2.28 km. south of the GNIS location of Golden South side of gulch, growing in woody shrubs. Also collected here: Epilobium hirsutum, Solanum dulcamara, and Dactylis glomerata. 31 Jul 2020. (COLO2433993^‡, OBI186046^‡, REGIS).
2773, DeLong Park (City of Golden). New city park (construction in 2021 and 2022) near the intersection of 23rd Street and Vernon Drive, 1.75 km. southeast of the GNIS location of Golden. Colorado Noxious Weed List B. 6 May 2022. (Golden).
3210, Guy Gulch. Broken shade up a small gulch 30 m. northeast of the Centennial Ranch house, 12.2 km. (geodesic) northwest of the GNIS location of Golden. Colorado Noxious Weed List B. EDDMaps: 11926494. 8 Sep 2023. (Undist.).

Cirsium neomexicanum A. Gray.  Desert Thistle.
354, Mesquite Mountains. Alongside the road, 2.15 mi (3.46 km) northeast of Winters Pass on Kingston Road, near the rock shelter and cattle guard. 20 April 2004. (UC, UCR248648^‡).

Cirsium scariosum Nutt. var. congdonii (Moore & Frank.) Keil.  Meadow Thistle.
855, Bridgeport Canyon. Road side at the upper, unnamed spring in Bridgeport Canyon, along Coyote Spring Road, 4.9 road miles north northwest of the intersection of Cottonwood Canyon Road and California Highway 167. 21 Jun 2012. (CAS1157546^‡, UC).

Cirsium undulatum (Nutt.) Spreng.  Wavy Leaved Thistle.
1460, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 1.6 mi. west on CO Hwy 72 from CO Hwy 93, 1.3 mi. north on Plainview Road, then 195 m. east along the north side of an ephemeral stream; 15.2 km. north northwest of the GNIS location of Golden. Mixed grasses and forbs on a dry alluvial terrace. 27 Jun 2016. (EIU, JCOS s.n., KHD00063456^‡).
2370, Colorado School of Mines Survey Field. Southern part of the Survey Field, high plains at the base of the Rocky Mountain Front Range, 3.15 km. south of the GNIS location of Golden. Northeast-facing gentle slope in foothills grassland, also collected or seen nearby: Opuntia macrorhiza, Hymenopappus filifolius, Aegilops cylindrica, and Poa bulbosa. The common native thistle in Jefferson County, Colorado. 20 Jun 2020. (KHD00079304^‡, OBI149313^‡, UCR).
2377, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 1.7 mi. west on CO Hwy 72 from CO Hwy 93, 1.2 mi. generally north on Plainview Road, then 450 m. east along the north side of an ephemeral stream, 19.9 km. north northwest of the GNIS location of Golden. Scattered on a terrace above ephemeral stream. 23 Jun 2020. (CAS, CDA0053759^‡, COLO2434405^‡, UC).

Cirsium vulgare (Savi) Ten.  Bull Thistle. Weed: CA, CAL-IPC, List: Moderate. CA, Inyo National Forest, priority: Moderate, List: C. CO, CO DofA, List: B.
1035, Jean Sweeney Open Space Preserve. Growing in weeds in the preserve, about 200 meters from the west end, and 50 meters north of the end of 8th Street. 31 Aug 2013. (CAS1203239^‡, UC2045716^‡, UCR262292^‡).
3237, Coal Creek Canyon Study Area, Lacey Parcel. In cobbles and gravel of the bank of Coal Creek, 850 m. northwest of the Coal Creek Canyon Fire Department Station 3, 14.6 km. north northwest of Golden. iNaturalist: 209169508. 24 Apr 2024. (Undist.).

Conyza canadensis (L.) Cronquist.  (Syn: Erigeron canadensis (L.) Cronquist ) Canadian Horseweed.
518, Walker Creek (Lower). Lower Walker Creek at the transition from Bloody Canyon to Pumice Valley, just below the aqueduct and Forest Road 01N17 “Farrington Siphon,” on the north side of Walker Creek. Also collected here: Eriogonum brachyanthum, and Nicotiana attenuata. 2 Aug 2007. (CAS1202034^‡, UC2045726^‡).

Crepis capillaris (L.) Wallr.  Smooth Hawk's-Beard.
2243, Little Scraggy Peak. Buffalo Creek Recreation Area, northeast slopes of Little Scraggy Peak, 2.04 km. southwest of the Little Scraggy trailhead, 61.2 km. south of the GNIS location of Golden. Area generally disturbed by minerals prospecting, fuels reduction, and mountain biking recreation. 16 Sep 2019. (CDA56586^‡, CS202023^‡, KHD ^‡, OBI^‡).

Crepis intermedia A. Gray.  Limestone Hawksbeard.
687, Cottonwood Canyon. Western portion of the uppermost reaches of Cottonwood Canyon, about 1 mile (1.6 km) north northwest of Mount Biedeman, and 1.75 mi (2.8 km) south of Murphy Spring. 25 Jul 2010. (CAS1131435^‡, UC1980400^‡).

Crepis occidentalis Nutt.  (Syn: Psilochenia occidentalis (Nutt.) Nutt. ) Largeflower Hawksbeard.
1894, Colorado School of Mines Survey Field. Highest Great Plains at the base of the Rocky Mountain Front Range, southeast-facing slope, above an unnamed stream in the south end of the Survey Field, 2.36 km. south of the GNIS location of Golden. Chicorieae, phyllaries grayish, glandular. Subspecies costata if infraspecific names are to be applied. 28 May 2018. (KHD00069231^‡, OBI147777^‡).
2793, City of Golden Parcel 40-102-01-032. 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. Subspecies costata (A. Gray) Babcock & Stebbins, if infraspecific names are to be applied. 10 Jun 2022. (Golden).
2978, Eagle Ridge, Tract A. 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 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. 19 Jun 2023. (CAS, CDA, CS, UCR).
3265, Centennial Cone Park. 14 Jun 2024. (Undist.).

Cyclachaena xanthiifolia (Nutt.) Fresen.  (Syn: Iva xanthiifolia Nutt. ) Carelessweed.
2423, Deadman Gulch. 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. 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. 17 Aug 2020. (COLO2433910^‡, KHD00073442^‡, OBI186037^‡).

Dieteria bigelovii (A. Gray) D. R. Morgan & R. L. Hartman.  (Syn: Machaeranthera b. (A. Gray) Greene , Machaeranthera varians Greene ) Bigelow's Tansy Aster.
1299, Tin Cup Ridge. Among rocks along the top of Tin Cup Ridge, the northern extension of Dakota Ridge into Golden, 4.7 km south southeast of the GNIS location of Golden. 23 Sep 2015. (JCOS s.n., KHD00061539^‡, UC, UCR267492^‡).
1565, Ranson/Edwards Homestead Open Space Park. Bank below Plainview Road, 1.7 mi. west on CO Highway 72 Coal Creek Canyon Road from CO Highway 93, 1.8 mi. north on Plainview Road; 16.0 km. north northwest of the GNIS location of Golden. Resprouting laterally after having been eaten. 28 Sep 2016. (JCOS s.n., KHD00066686^‡).
2234, Little Scraggy Peak. Buffalo Creek Recreation Area, northeast slopes of Little Scraggy Peak, 1.47 km. southwest of the Little Scraggy trailhead, 60 km. south of the GNIS location of Golden. Variety bigelovii if infraspecific names are to be applied. Area generally disturbed by minerals prospecting, fuels reduction, and mountain biking recreation. Same as Coll. No. 2239. 16 Sep 2019. (OBI149566^‡).
2239, Little Scraggy Peak. Buffalo Creek Recreation Area, northeast slopes of Little Scraggy Peak, 2.04 km. southwest of the Little Scraggy trailhead, 61.2 km. south of the GNIS location of Golden. Area generally disturbed by minerals prospecting, fuels reduction, and mountain biking recreation. Same as Coll. No. 2234. 16 Sep 2019. (CAS, CDA0052319^‡, KHD00070995^‡, UCR).
2663, Bull Gulch. Lippincott Ranch, crossed west to east by Bull Gulch, 222 m. west from the eastern boundary, north bank of the gulch, 1.36 km. north northwest of the main gate, and 23.0 km. north northwest of the GNIS location of Golden. Several rattlesnakes here. Lippincott Ranch is jointly owned by City of Boulder Open Space and Mountain Parks and Jefferson County Open Space. Variety bigelovii if infraspecific names are to be applied. 7 Aug 2021. (CS, EIU, COLO2706349^‡, CIBO).
3208, Guy Gulch. Work or parking area in front of ranch sheds, 40 m. southeast of the Centennial Ranch house, 15.8 km. (geodesic) northwest of Golden. With Symphyotrichum porteri. Distance from Golden was measured as 15.8 km in planar mode in error, whereas a more accurate distance would be 12.2 km. measured in geodesic mode. 8 Sep 2023. (COLO, OBI, REIS, JCOS).
3372, Dispersed Camp Site. 12 Sep 2024.

Dieteria bigelovii (A. Gray) D. R. Morgan & R. L. Hartman var. bigelovii.  Bigelow's Tansy Aster.
3180, Guy Gulch. Southwest side of County Road 70 and the gulch, 615 m. northwest of Centennial Ranch, 12.8 km. northwest of the GNIS location of Golden. Open southeast-facing slope of ridge above small gulch tributary to Guy Gulch, also here: Helianthus pumilis and Heterotheca villosa. 31 Jul 2023. (OBI, JCOS).

Dittrichia graveolens (L.) Greuter.  Stinkwort. Weed: CA, CAL-IPC, priority: Moderate, List: Moderate.
909, Mount Trashmore, Alameda. Beside the bicycle path connecting the intersection of Doolittle Drive and Island Way to the intersection of the Veterans Way bicycle path and the Bay Farm bicycle bridge. 3 Oct 2012. (CAS1157551^‡, CDA39764^‡, UC, UCR248635^‡).

Dyssodia papposa (Vent.) Hitchc.  Fetid Marigold.
1540, North Table Mountain Park. Lower north slopes of North Table Mountain, on North Table Loop trail, at the fenceline of the Williams parcel, 0.88 km. southeast of the Mesa Spur trailhead on W. 58th Avenue, 4.7 km. north northeast of the GNIS location of Golden. On edge of private horse pasture. 16 Aug 2016. (KHD00065750^‡).

Eatonella nivea (D.C.Eaton) A. Gray.  White False Tickhead.
755, Mono Basin. Approximately 0.7 mi east on Forest Road 1N23 from California Highway 120, 6.2 miles by road east of the south junction of US Highway 395 and California Highway 120. Northeast flank of a gravel pit. The mature plants in the fragment packet were wet when collected 11 Sep 2011. The hairs were sticky and binding seeds and grains of sand in the mass of hairs. 16 Jun 2011. (CAS1131407^‡, UC1980490^‡).
801, Mono Basin. Approximately 0.7 mi east on Forest Road 1N23 from California Highway 120, 6.2 miles by road east of the south junction of US Highway 395 and California Highway 120. Northeast flank of a gravel pit. The materials of this collection were combined with Coll. No. 755 when deposited at UC and CAS. 11 Sep 2011. (CAS1131408^‡).

Ericameria cuneata (A. Gray) McClatchie.  Wedgeleaf Goldenbush.
40, Lobo Point. In rocks. Common. . (UC(TAS), Zzyzx s.n.).

Ericameria linearifolia (DC.) Urb. & J. Wussow.  Narrowleaf Goldenbush.
39, Lobo Point. In scrub and woodland. Common. . (Zzyzx s.n.).
92, Wild Horse Mesa. North slope of Wild Horse Mesa, 3.7 miles west of Hole-in-the-Wall, 7.5 miles north northeast of Mitchell Caverns. 29 April 1997. (Golden, Zzyzx s.n.).
207, San Carlos Creek. Along San Carlos Creek 1 mile below New Idria Mine. Steep hill slope on sandstone. 2 April 2000. (?, CAS1160961^‡).
1581, Mesquite Mountains. 19.6 miles north of US Interstate 15 on Kingston Road, then 1.1 miles west on an unnamed cherry stem road into the North Mesquite Mountains Wilderness (road is 1.3 miles north of Wilson Pass). Location of my collections Coll. No. 1579 to 1590. 18 Apr 2017. (COLO02348795^‡, CS, EIU, UC2080711^‡).

Ericameria nauseosa (Pall. ex Pursh) G.L.Nesom & G.I.Baird var. graveolens (Nutt.) Reveal & Schuyler.  Goldy-Locks.
1063, Golden. Illinois Street at alley between 4th and 5th Streets, 1 km northwest of the GNIS location of Golden. 17 Sep 2014. (CAS, UC2045981^‡).
1064, Golden. In a waste place at the intersection of 4th and Illinois Streets, below the Mitchell School playground, 1 km northwest of the GNIS location of Golden. 17 Sep 2014. (UCR266868^‡).
2229, North Washington Open Space. 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). Collected nearby: Lomatium orientale, Mertensia lanceolata, Colutea arboescens, Psoralidium tenuiflorum, and Viola nuttallii. 12 Sep 2019. (CDA0052315^‡, COLO2433647^‡, EIU, KHD00074458^‡, OBI186063^‡, REGIS, UCR).
2431, Apex Park - Northern Parcel. East-central corner of park where multiple unnamed gulches join before flowing through Stonebridge HOA, small ridge between gulches, 4.47 km. south of the GNIS location of Golden. Mixed foothills shrubland and grassland, also seen or collected here: Artemisia dracunculus, Senecio spartioides (in bud, no flowers), Solidago missouriensis, and Xanthisma spinulosum. 19 Aug 2020. (CS, JCOS s.n., KHD00073458^‡, OBI186032^‡).
3226, Colorado School of Mines Survey Field. Northwest corner of the Survey Field, mixed grass prairie, highest Great Plains at the Rocky Mountain Front Range scarp,2.09 km. (geodesic) south southwest of the GNIS location of Golden. Gravelly open fields with Rhus trilobata, Artemisia dracunculus, Prunus virginiana, and Thinopyrum intermedium, but beside a small perennial stream that is probably overflow from a nearby city water tank. 17 Sep 2023. (COLO, CS, EIU, CAS).

Ericameria nauseosa (Pall. ex Pursh) G. I. Nesom & G. I. Baird var. hololeuca (A.Gray) G.L.Nesom & G.I.Baird.  Rubber Rabbitbush.
513, Bohler Canyon. Dry areas on the edge of a wet meadow along the creek in Bohler Canyon, about 2.0 mi (3.1 km) by air west of US Highway 395. 2 Aug 2007. (CAS1120732^‡, UC1973765^‡).
885, Sagehen Meadow. Northwest edge of the meadow, in an area of mixed Sagebrush and Jeffrey pines. 22 Aug 2012. (CAS1157596^‡, UC).
886, Sagehen Meadow. In a recently disturbed area of brush just north-northwest of the meadow. 22 Aug 2012. (CDA39241^‡, UCR248619^‡).

Ericameria nauseosa (Pall. ex Pursh) G. I. Nesom & G. I. Baird var. nauseosa.  (Syn: Chrysothamnus plattensis Greene ) Rubber Rabbitbush.
2421, Eagle Ridge. 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. 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. 17 Aug 2020. (KHD00073444^‡).
2440, Eagle Ridge. 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. See also Coll. No. 2421, same taxon and location, 11 days earlier. 28 Aug 2020. (CAS, COLO2433845^‡, OBI186034^‡, UCR297671^‡).
3370, South Table Mountain Park. With Grindelia squarrosa, Opuntia macrorhiza, and Agropyron cristatum. 11 Sep 2024. (Undist.).

Ericameria nauseosa (Pall. ex Pursh) G. I. Nesom & G. I. Baird var. oreophila (A.Nelson) G.L.Nesom & G.I.Baird.  Rubber Rabbitbush.
1025, Walker Creek (Lower). In Pumice Valley, along old US Highway 395 just south of the crossing of Walker Creek, about 4.5 miles by road south of Lee Vining. 24 Jul 2013. (CAS1202030^‡, UC2045732^‡).

Ericameria parryi (A. Gray) G. I. Nesom & G. I. Baird var. aspera (Greene) G. L. Nesom & G. I. Baird.  Rough Rabbitbrush.
991, Railroad Sand Flat. Near the former Bodie & Benton Railway roadbed about 50 m north of Forest Road 01S91 “Old Stationhouse Road”, 3 miles by that road south of Mono Mills. Growing in loose volcanic cinder sand. 20 Jun 2013. (Alameda).

Ericameria parryi (A. Gray) G. I. Nesom & G. I. Baird var. parryi.  Parry's Rabbitbrush.
2698, Salt Creek. Just north of Salt Creek, between it and Pike-San Isabel National Forest Road 435 "Salt Creek Road," 3.1 mi. by road west of US Highway 285, 145 km. southwest of the GNIS location of Golden Open prairie just above the creek, not as dry as the slope above where most collections were made at this location. 16 Aug 2021. (UCR, COLO2691921^‡, KHD00075279^‡, OBI183395^‡).

Erigeron .  Fleabane.
2724, Brumley. Sandy abandoned oxbow of the North Fork of Lake Creek, about 130 m. north of the Sno-Tel station road turnoff from the highway, about 11 road miles generally west on Colorado Highway 82 from the town of Twin Lakes, 175 km. southwest of Golden. Brumley was a stage stop on the route across Independence Pass. 18 Aug 2021. (Golden).

Erigeron aphanactis (A. Gray) Greene var. aphanactis.  Rayless Shaggy Fleabane.
769, Horseshoe Canyon Moraine. On the ridge of Horseshoe Canyon Moraine overlooking Grant Lake, 1.4 miles south of the Rush Creek Return Ditch Gatehouse on Forest Road 1S104. 20 Jun 2011. (CAS1131403^‡, UC1980477^‡).

Erigeron compositus Pursh.  (Syn: E. compositus Pursh var. discoideus A. Gray , E. compositus Pursh var. glabratus Macoun ) Cutleaf Daisy.
1901, Little Scraggy Peak. Northeast slopes of Little Scraggy Peak, 46.5 km. south of the GNIS location of Golden. Moderate slope in Ponderosa pine forest. 31 May 2018. (CAS, KHD00069232^‡, OBI).
2468, Hankins Gulch. Slopes above Hankins Gulch near its mouth on Goose Creek, area burned by Hayman fire of 2002, 86 km. south-southwest of Golden. Downed ponderosa pines, with Antennaria parvifolia, Erigeron vetensis, Clematis columbiana, Cymopterus anisatus, and Arctostaphylos uva-ursi. 23 May 2021. (COLO2706679^‡, UCR).

Erigeron divergens Torr. & A. Gray.  Spreading Fleabane.
1489, North Table Mountain Park. Top of North Table Mountain, along an old road and former powerline headed in the general direction of the radio station, 2.6 km. north of the GNIS location of Golden In thin soils or cracks of basalt caprock, near the edge of prairie dog town. 13 Jul 2016. (CS, JCOS s.n., KHD00063464^‡, UC).
1668, North Washington Open Space. 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. West-central part of hill, southwest slope. 16 Jun 2017. (KHD00065482^‡, UCR ^‡).
1879, North Table Mountain Park. Smooth brome-infested grasslands on the lower northwest slope of North Table Mountain, about half-way north from North Table Loop in the direction of Ramstetter Reservoir, 3.85 km. north of the GNIS location of Golden. 23 May 2018. (CAS, JCOS s.n., KHD00069211^‡, OBI).
2092, North Washington Open Space. 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. 26 Jun 2019. (KHD00070525^‡).
2835, Lippincott Ranch (North). Left bank of the north fork of Spring Brook, 2.59 km. north northwest of the main gate, 2.31 km. south southwest of the GNIS location of Eldorado Springs. Sunny spot among ponderosa pines above the creek, also collected or seen nearby: Humulus lupulus, Rumex acetosella, Castilleja rhexifolia, and Smilax lasioneuron. Lippincott Ranch is jointly owned by City of Boulder Open Space and Mountain Parks and Jefferson County Open Space. 2 Jul 2022. (CIBO, JCOS, KHD00079103^‡).

Erigeron eatonii A. Gray var. sonnei (Greene) G. L. Neson.  Sonne's Daisy.
968, Bridgeport Canyon. Along Coyote Springs Road, about 1/3 mile southeast of the pass, at a watercourse crossing the road from southwest to northeast, 6˝ miles by road north of California Highway 167. 22 May 2013. (CAS1160957^‡, RENO64687^‡, UC).

Erigeron eximius Greene.  (Syn: E. superbus Greene ex. Rydb. ) Splendid Daisy, Sprucefir Fleabane.
2848, Morrison Creek. Buffalo Creek Recreation Area, upper reaches of Morrison Creek, southwest of Little Scraggy Peak, 1.83 km. west northwest of the Kelsey Campground, and 5.79 km. southwest of the Little Scraggy Trailhead. Streamside in shady forest, also collected nearby Aconitum columbianum, Hackelia floribunda, and Geranium caespitosum. 12 Jul 2022. (KHD00079828^‡).
2850.1, Morrison Creek. in a glade beside the creek Same as Coll. No. 2848. 12 Jul 2022. (Discarded).

Erigeron flagellaris A. Gray.  Trailing Fleabane.
1116, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 15.2 km north northeast of Golden, 1.3 miles north of CO State Highway 72 on Plainview Road, 65 m. east of Plainview Road. Not common in Jefferson County, but with several other nearby collections, e.g., from Rocky Flats and around the mouth of Coal Creek Canyon. 28 May 2015. (CAS, JCOS s.n., KHD56969^‡, UC, UCR265987^‡).
1679, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 1.7 miles west on CO Highway 72 from CO Highway 93, 1.3 miles north on Plainview Road, then 20 meters east into open prairie. Along old road in the direction of the original homestead. 28 Jun 2017. (CDA0050014^‡, EIU029806^‡, JCOS s.n., KHD00065481^‡, OBI124849^‡).
1829, Kinney Run. 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. Thin vegetation on sandstone. 16 May 2018. (CAS, COLO02347615^‡, CS, UCR ^‡).
2537.1, Lippincott Ranch. Southwest corner of the "panhandle" southern part of the ranch, near the powerline, 21.7 km. north northwest of the GNIS location of Golden. Open seasonally wet grassland, also nearby: Potentilla hippiana var. effusa, Amorpha nana, and Gentiana affinis. Lippincott Ranch is jointly owned by City of Boulder Open Space and Mountain Parks and Jefferson County Open Space. 29 Jun 2021. (CIBO, REGIS, COLO2706505^‡, JCOS, OBI183419^‡).
2569, Salt Creek. South-facing hillside along Salt Creek and Pike-San Isabel National Forest Road 435 "Salt Creek Road," 3.2 mi. by road west of US Highway 285, 145 km. southwest of the GNIS location of Golden. Open hillside with pines, also collected here: Oenothera coronopifolia, Lithospermum multiflorum, Penstemon barbatus var. torreyi, Gutierrezia sarothrae, and Muhlenbergia montana. 12 Jul 2021. (CS, EIU, UC, CDA).
2992, Guy Gulch. North of Guy Gulch, accessed by a ranch road off of Pyrenees Lane, on the southwest-facing slope just a few meters west of the line shack, 1.12 km. west southwest of Mt. Tom, 13.8 km. (geodesic) northwest of the GNIS location of Golden. Open grassy slope with Rumex acetosella, Cerastium arvense, Microsteris gracilis, and Bouteloua gracilis. 23 Jun 2023. (OBI, JCOS, KHD ^‡, UCR308414).
3381, Dispersed Camp Site. 12 Sep 2024. (Undist.).

Erigeron glacialis (Nutt.) A. Nelson.  Glacial Daisy.
2005, North Fork West Tennessee Creek. Tennesee Creek Basin, 8.2 mi. north of Leadville, then 2.4 mi. generally west on County Road 9 and Forest Road 131, not quite to Lily Lake, 12.5 km. north northeast of the GNIS location of Leadville. Mixed pine forest and abandoned beaver dams. Variety glacialis if infraspecific names are to be applied. 25 Jul 2018. (KHD00069212^‡, OBI148135^‡, UC, UCR ^‡).
2584, Lily Lake. North side of Lily Lake, at the edge of a wetland formed by North Fork West Tennessee Creek, near the end of the Pike-San Isabel Forest Road 131, 2.8 road miles west of US Highway 24, 140 km. southwest of the GNIS location of Golden. Also collected here: Potentilla gracilis var. fastigiata, Arctostaphylos uva-ursi, Penstemon procerus, Erigeron glacialis. and Taraxacum officinale. 13 Jul 2021. (CAS, CS, COLO2706216^‡, CDA).

Erigeron lonchophyllus Hook.  (Syn: Trimorpha lonchophylla (Hook.) G. L. Nesom ) Short Ray Fleabane.
709, Big Sand Flat. Wet area where Dry Creek enters Big Sand Flat. 26 Aug 2010. (CAS1131420^‡, UC1980380^‡).

Erigeron speciosus (Lindl.) DC.  Aspen Fleabane.
2166.1, Lindsay/JEFFCO. On the City of Boulder OSMP parcel just west east across the fence from the Lippincott Parcel, south side of Bull Gulch, 22.8 km. north northwest of the GNIS location of Golden. With Monarda fistulosa, Castilleja integra, Phleum pratense, openings in Pinus ponderosa forest. 21 Jul 2019. (CIBO, JCOS s.n., KHD00070787^‡, OBI183251^‡).
2612, Lippincott Ranch (North). Northern part of ranch, north-facing slope overlooking Spring Brook. 2.2 km. north of the main gate, 23.8 km. north northwest of the GNIS location of Golden. Deep grasses in openings of ponderosa pine woodland. Lippincott Ranch is jointly owned by City of Boulder Open Space and Mountain Parks and Jefferson County Open Space. 20 Jul 2021. (CIBO, UCR, COLO2718427^‡, JCOS).
2645, Morrison Creek. Buffalo Creek Recreation Area, along Morrison Creek and former National Forest Road 547, 2.30 km. south of National Forest Road 550, 62.9 km. south of the GNIS location of Golden. Banks of Morrison Creek, at north end of a opening in the forest or “meadow” with many down trees. 5 Aug 2021. (CAS, CS, UC, CDA).
3175, Guy Gulch. Southwest side of the gulch, 690 m. northwest of Centennial Ranch, 12.9 km. northwest of the GNIS location of Golden. Steep slope below rock outcrop, with Senecio pudicus. 31 Jul 2023. (EIU, OBI, KHD00080573^‡, JCOS).
3296, Coal Creek Canyon Study Area, Lacey Parcel. Sunny spot 3 Jul 2024. (Undist.).
3304, Coal Creek Canyon Study Area, Lacey Parcel. openings in Ponderosa pine and Douglas fir 19 Jul 2024. (Undist.).

Erigeron subtrinervis Rydb. ex Porter & Britton.  Threenerve Daisy.
1988, Chalk Creek. Along Chalk Creek, National Forest Road 134, off Colorado Highway 91, 13.3 km. northeast of the GNIS location of Leadville. 23 Jul 2018. (CS, KHD00069214^‡, OBI170959^‡, UC, UCR ^‡).
2240, Little Scraggy Peak. Buffalo Creek Recreation Area, northeast slopes of Little Scraggy Peak, 2.04 km. southwest of the Little Scraggy trailhead, 61.2 km. south of the GNIS location of Golden. Also collected here: Juniperus scopulorum, Dieteria bigelovii, and Chenopodium fremontii. Area generally disturbed by minerals prospecting, fuels reduction, and mountain biking recreation. 16 Sep 2019. (CAS, KHD00070994^‡, OBI186026^‡, UCR).
2241, Little Scraggy Peak. Buffalo Creek Recreation Area, northeast slopes of Little Scraggy Peak, 2.04 km. southwest of the Little Scraggy trailhead, 61.2 km. south of the GNIS location of Golden. Also collected here: Juniperus scopulorum, Dieteria bigelovii, and Chenopodium fremontii. Area generally disturbed by minerals prospecting, fuels reduction, and mountain biking recreation. 16 Sep 2019. (CDA0052320^‡, COLO2433548^‡, EIU, REGIS).
2571, Salt Creek. South-facing hillside along Salt Creek and Pike-San Isabel National Forest Road 435 "Salt Creek Road," 3.2 mi. by road west of US Highway 285, 145 km. southwest of the GNIS location of Golden. Open hillside with pines, also collected here: Oenothera coronopifolia, Lithospermum multiflorum, Penstemon barbatus var. torreyi, Gutierrezia sarothrae, and Muhlenbergia montana. 12 Jul 2021. (CAS, UC, COLO2706455^‡, CDA).
2642, Morrison Creek. Buffalo Creek Recreation Area, along Morrison Creek and former National Forest Road 547, 2.66 km. south of National Forest Road 550, 63.2 km. south of the GNIS location of Golden. Edge of open forest and adjacent meadow. 5 Aug 2021. (CS, EIU, KHD00075623^‡, OBI183731^‡).
2689, Salt Creek. South-facing hillside along Salt Creek and Pike-San Isabel National Forest Road 435 "Salt Creek Road," 3.2 mi. by road west of US Highway 285, 145 km. southwest of the GNIS location of Golden. Open hillside with ponderosa pines, collected nearby: Hymenoxys richardsonii var. floribunda, and Muhlenbergia montana. 16 Aug 2021. (CAS, UC, COLO2691939^‡, UCR).
2896, Unnamed Gulch on Forest Road 189. Along Forest Road 189, about 1 km. west of County Road 18 “East Tennessee Road,” 7.37 km. north northwest of the GNIS location of Leadville. Openings in aspen forest, surrounded by big sagebrush and willows. 21 Jul 2022. (Akure, CS, UCR, KHD00078707^‡, OBI183835^‡).

Erigeron tracyi Greene.  (Syn: E. cinereus A. Gray , E. colomexicanus A. Nelson , E. divergens Torrey & A. Gray var. cinereus A. Gray ) Running Fleabane.
1133, North Table Mountain Park. Mesa top, southeast portion of North Table Mountain, 3.3 km northeast of the GNIS location of Golden. Very thin soil on volcanic caprock of mesa. 9 Jun 2015. (JCOS s.n., KHD56940^‡, UC, UCR265984^‡).
1337, North Table Mountain. 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. Signed as Jefferson County Open Space, parcel owned by City of Golden. 11 May 2016. (CAS, JCOS s.n., KHD00063981^‡, UCR278798^‡).
1612, North Washington Open Space. 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. South side of hill, near the informal “bench.” 15 May 2017. (CDA0050100^‡, COLO02347862^‡, KHD00065379^‡).
1891, Colorado School of Mines Survey Field. Highest Great Plains at the base of the Rocky Mountain Front Range, small southeast-facing terrace, above an unnamed stream in the south end of the Survey Field, 2.42 km. south of the GNIS location of Golden. 28 May 2018. (CS, EIU, OBI).
2100, Tin Cup Ridge. East base of the hogback locally called Tin Cup Ridge, the northward extension of Dinosaur Ridge into Golden, 6.4 km. south southeast of the GNIS location of Golden. Mixed grasses and forbs. Collected with Achillea millefolium, Erigeron tracyi, Heterotheca villosa, and Medicago lupulina. 30 Jun 2019. (JCOS s.n., KHD00070535^‡, OBI183227^‡, REGIS).
2298, Apex Park - Northern Parcel. Northernmost quadrant of the parcel, steep slope part way up the initial Front Range scarp, just north of a small spring, 4.03 km. south of the GNIS location of Golden Also seen or collected nearby: Juniperus scopulorum, Eriogonum alatum, Turritis glabra, Physalis hederifolia, and Scorzonera laciniata. Thought to be an stable apomictic hybrid of E flagellaris and E. diverngens (FNANM) and is the most common of the three taxa in Golden and vicinity. 26 May 2020. (CAS, COLO2433787^‡, JCOS s.n., KHD00073449^‡, UC).
2345, Apex Park - Northern Parcel. Northernmost part of Apex Park, northeast corner, in grasslands on alluvial terrace just below foothill shrublands and the Rocky Mountain foothills scarp, 4.09 km. south of the GNIS location of Golden. Also collected nearby: Ribes cereum, Prunus virginuana, Astragalus flexuosus, Lupinus argenteus, Linum lewisii, Bromus japonicus, and Nassella viridula. 10 Jun 2020. (CDA0053749^‡, CS, EIU, JCOS s.n., KHD00073448^‡).

Erigeron ursinus D. C. Eaton.  Bear River Fleabane.
2607, Unnamed meadow on Forest Road 109. Southern part of the ridge that includes Mount Zion and Buckeye Peak, about 2.7 road miles north of Leadville, access to Forest Road 109 from US Highway 24, 140 km. southwest of Golden. Toward the northeast edge of meadow, also collected hearby: Geum triflorum, Astragalus alpinus, Vicia americana, and Leptosiphon nuttallii. 15 Jul 2021. (CS, OBI, OBI, UCR, KHD00076202^‡).

Erigeron vetensis Rydb.  Early Bluetop Fleabane.
1421, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 1.6 mi. west on CO Hwy 72 from CO Hwy 93, 1.8 mi. north on Plainview Road, then 300 m. southwest upslope.15.8 km. north northeast of the GNIS location of Golden. Small ridge between two drainages, grasses and a few ponderosa pines. 10 Jun 2016. (CAS, JCOS s.n., KHD00063991^‡, OBI83311^‡, UC, UCR277989^‡).
2465, Hankins Gulch. Slopes above Hankins Gulch near its mouth on Goose Creek, area burned by Hayman fire of 2002, 86 km. south-southwest of Golden. Downed ponderosa pines, with Packera werneriifolia, E. compositus, Clematis columbiana, Cymopterus anisatus, and Arctostaphylos uva-ursi. 24 May 2021. (KHD00075605^‡).
2943, Guy Gulch. Douglas Mountain Study Area, area along Guy Gulch, about 100 m. above the road, north side of Jefferson County Road 70 and near western boundary, 17.8 km. northwest of the GNIS location of Golden. Nose of small southeast plunging ridge, with Pediocactus simpsonii, Eriogonum jamesii, and Cercocarpus montanus. 6 Jun 2023. (COLO, CS, EIU, JCOS).

Eriophyllum lanatum (Pursh) J. Forbes var. integrifolium (Hook.) Smiley.  (Syn: Erigeron monoense Rydb. ) Oregon Sunshine.
681, Dry Creek. Sandy soils among Jeffrey pines near the top of Dry Creek, near the intersection of Forest Roads 1S55 and 1S56. 23 Jul 2010. (CAS1131432^‡, UC1980358^‡).

Eriophyllum pringeli A. Gray.  Pringle's Woolly Sunflower.
93, Wild Horse Mesa. North slope of Wild Horse Mesa, 3.7 miles west of Hole-in-the-Wall, 7.5 miles north northeast of Mitchell Caverns. . (Zzyzx s.n.).
116, Lobo Point. Lobo Point Camp, 2.6 km northwest of Hole-in-the-Wall, 14.7 km northeast of Mitchell Caverns. Common in the Lobo Point Camp. 30 April 1997. (UC, Zzyzx s.n.).
314, Lobo Point. Experimental plots in Salvia dorrii, bajada just north of Lobo point, about 2˝ miles northwest of Hole-in-the-Wall, 9 miles northeast of Mitchell Caverns. 27 May 2003. (Golden).

Eriophyllum wallacei (A. Gray) A. Gray.  (Syn: Antheropeas wallacei (A. Gray) Rydberg ) Woolly Easter Bonnets.
118, Lobo Point. Lobo Point Camp, 2.6 km northwest of Hole-in-the-Wall, 14.7 km northeast of Mitchell Caverns. Common in the Lobo Point Camp. 30 April 1997. (Golden, Zzyzx s.n.).
278, Lobo Point. Alluvial flats and washes, 1˝ miles west northwest of Hole-in-the-Wall, and 9 miles north northeast of Mitchell Caverns. 24 April 2001. (Golden).
340.2, Mesquite Mountains. In Creosote Bush scrub, on Kingston Road, south of the Winters Pass Hills, 13 mi (20.9 km) north of Valley Wells, 5.2 mi (8.4 km) south southwest of Winters Pass, near the Mesquite Mountains, 79 km southwest of Las Vegas, Nevada. 20 April 2004. (UC1953378^‡).
1580, Mesquite Mountains. 19.6 miles north of US Interstate 15 on Kingston Road, then 1.1 miles west on an unnamed cherry stem road into the North Mesquite Mountains Wilderness (road is 1.3 miles north of Wilson Pass). Location of my collections Coll. No. 1579 to 1590. 18 Apr 2017. (COLO02348902^‡, CS, EIU, UC2080712^‡).

Gaillardia aristata Pursh.  Blanketflower.
1205, Colorado School of Mines Survey Field. On the top of a drier alluvial ridge, near the center of the Survey Field, 2.2 km south southeast of the GNIS location of Golden. 12 Jul 2015. (KHD00062158^‡).
1425, Deadman Gulch. 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. East-facing grassy slope. Deadman Gulch is often referred to by the locally euphemistic name of “Kinney Run.” 15 Jun 2016. (CS, UCR278002^‡).
1454, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 1.6 mi. west on CO Hwy 72 from CO Hwy 93, 1.2 mi. north on Plainview Road, then 200 m. east along the south side of an ephemeral stream; 15.2 km. north northwest of the GNIS location of Golden. Mostly grasses and forbs; collected with Rosa arkansana and Crataegus succulenta. 27 Jun 2016. (CAS, EIU, JCOS s.n., KHD00063470^‡).
1665, North Washington Open Space. 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. Top of hill, center of parcel. 16 Jun 2017. (KHD00065494^‡, OBI124848^‡).
2116, Lippincott Ranch. Northernmost Jefferson County, parcel jointly owned by Jefferson County Open Space and City of Boulder OSMP, open wet prairie in southeast portion, 21.7 km. north northwest of the GNIS location of Golden. Also collected here: Bromus japonicus, Dianthus armeria, Heterotheca villosa, Potentilla recta, and Veronica anagallis-aquatica. 1 Jul 2019. (JCOS s.n.).
2117, Lippincott Ranch. Northernmost Jefferson County, parcel jointly owned by Jefferson County Open Space and City of Boulder OSMP, open wet prairie in southeast portion, 21.8 km. north northwest of the GNIS location of Golden. 1 Jul 2019. (CDA0052297^‡, CIBO, COLO2434215^‡, KHD00072733^‡).
2356, Dakota Ridge. 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. Foothills shrubland, mostly Cercocarpus montanus; also collected here: Hypericum perforatum; nearby: Campanula rotundifolia, and Muhlenbergia montana. 12 Jun 2020. (UC).
2617, Lippincott Ranch (North). Northern part of ranch, north-facing slope overlooking Spring Brook. 2.27 km. north of the main gate, 23.9 km. north northwest of the GNIS location of Golden. Open prairie on north-facing slope, scattered ponderosa pines, nearing terrace above Spring Brook. Lippincott Ranch is jointly owned by City of Boulder Open Space and Mountain Parks and Jefferson County Open Space. 20 Jul 2021. (CIBO, JCOS).

Gnaphalium palustre Nutt.  Western Marsh Cudweed.
719.1, Rush Creek. Sandy areas on recently flooded banks of Rush Creek, 2.7 mi. downstream from US Highway 395, and 1.6 mi. upstream from Test Station Road. Found in a collection of Mimulus pilosa from this location. 30 Aug 2010.

Grindelia hirsutula Hook. & Arn.  (Syn: Grindelia humilis H. & A. , Grindelia robusta Nutt. var. angustifolia A. Gray , Grindelia stricta DC. var. angustifolia (A. Gray) M. A. Lane ) Hairy Gumweed.
882, Bay Farm Island, City of Alameda. In a small salt marsh near Veterans Park, accessed from Veterans Court across the sea wall. (Keys to G. stricta DC. var. angustifolia (A. Gray) M. A. Lane in TJM2, determined as G. hirsutula Hook. & Arn. per FNANM.) 10 Aug 2012. (CAS1157897^‡, UC).

Grindelia squarrosa (Pursh) Dunal.  Curlycup Gumweed.
1737, North Table Mountain Park. Northwest corner of North Table Mountain, lower elevation lobe of the mesa, formed on top of the oldest basalt flow embedded in the Denver Formation, 3.1 km. north of the GNIS location of Golden. Gentle grassy slope above oldest lava flow. 15 Aug 2017. (JCOS s.n., KHD00065318^‡, UCR ^‡).
1765, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 1.7 mi. west on Colorado Highway 72 from Colorado Highway 93, 1.6 mi. north on Plainview Road, then 35 meters southwest on the slope above the road. 1 Sep 2017. (CAS, JCOS s.n., KHD00065168^‡).
2213, Lippincott Ranch. Northernmost Jefferson County, parcel jointly owned by Jefferson County Open Space and City of Boulder OSMP, among boulders on the south side of Bull Gulch, 22.9 km. north northwest of the GNIS location of Golden. Also collected here: Heterotheca foliosa, Pericome caudata, Senecio spartioides, and Urtica dioica. Variety squarrosa per leaf proportions in Ackerfield (2015) if infraspecific names are to be applied. 29 Aug 2019. (CIBO, JCOS s.n., KHD00074449^‡, OBI186070^‡, REGIS).
2384, Apex Park - Northern Parcel. About half way up the initial Rocky Mountain Front Range scarp, near the south edge of the restricted area, 5.03 km. south of the GNIS location of Golden. In a watercourse on the lip of a now dry cascade and in the surrounding area. Mixed foothills shrubland with a few Rocky Mountain junipers. Also collected here: Polygonum douglasii. 17 Jul 2020. (CDA0053763^‡, COLO2434439^‡, JCOS s.n., UC).
2399, Dakota Ridge. 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. Foothills grassland, below any significant concentration of shrubs, also collected here: Rhus trilobata, Tragia ramosa, Eriogonum alatum, and Gutierrezia sarothrae. 29 Jul 2020. (CS, EIU).
2410, Kinney Run. 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. Foothills shrubland, also collected here: Astragalus shortianus, Cynoglossum officinale, Lithospermum arvense, Scutellaria brittonii, and Toxicoscordion paniculatum. 31 Jul 2020. (CDA0053773^‡, COLO2433894^‡, OBI186043^‡, UCR).

Grindelia squarrosa (Pursh) Dunal var. serrulata (Rydb.) Steyerm.  Curlycup Gumweed.
893, Conway Summit. East side of US Highway 395 just north of Conway Summit. 24 Aug 2012. (CAS1157594^‡, CDA39242^‡, UC).

Gutierrezia microcephala (DC.) A. Gray.  Threadleaf Snakeweed.
143, Lobo Point. Alluvial plains, flat areas, 1˝ miles west northwest of Hole-in-the-Wall, 9 miles north northeast of Mitchell Caverns. 3 Oct 1997. (Golden, Zzyzx s.n.).
157, Lobo Point. Alluvial flats, common in the informal campground, 1˝ miles east northeast of Hole-in-the-Wall, and 9 miles north northeast of Mitchell Caverns. 20 Sep 1998. (Golden, Zzyzx s.n.).

Gutierrezia sarothrae (Pursh) Britton & Rusby.  (Syn: G. linearifolia Lag. ) Broom Snakeweed.
144, Lobo Point. Alluvial plains, flat areas, 1˝ miles west northwest of Hole-in-the-Wall, 9 miles north northeast of Mitchell Caverns. 3 Oct 1997. (Zzyzx s.n.).
1289, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 16.25 km north northwest of Golden, 1.8 miles north of CO State Highway 72 on Plainview Road, then 105 m. west of Plainview Road. Steep south-facing slope, with a prairie rose, blue grama, and artemisia. 9 Sep 2015. (CAS, JCOS s.n., KHD00062159^‡, OBI83228^‡, UC, UCR267486^‡).
1543, North Table Mountain Park. West-facing slope on the north side of North Table Mountain, 0.92 km. south of the Mesa Spur trailhead on W. 58th Avenue, 4.3 km. north northeast of the GNIS location of Golden. Mixed grasses, subshrubs, and forbs. 18 Aug 2016. (EIU, JCOS s.n., KHD00063969^‡).
1550, North Table Mountain Park. Top of North Table Mountain, near southern edge, 360 m. east of the USBR monument designated “North Table,” 1.6 km. north northeast of the GNIS location of Golden. 1 Sep 2016. (COLO02348456^‡, CS, JCOS s.n., KHD00064002^‡).
1751, North Washington Open Space. 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. Eastern half of parcel, east slope at edge of smooth brome infestation. 31 Aug 2017. (CDA0052330^‡, KHD00065156^‡).
2211, Lippincott Ranch. Northernmost Jefferson County, parcel jointly owned by Jefferson County Open Space and City of Boulder OSMP, approx. centroid of parcel, atop spoils pile of clay pit, 22.5 km. north northwest of the GNIS location of Golden. Open recent growth ponderosa pine woodland, also seen/collected here: Achnatherum nelsonii, and Elymus elymoides. 29 Aug 2019. (CIBO, JCOS s.n., KHD00074454^‡, OBI183228^‡, REGIS).
2400, Dakota Ridge. 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. Foothills grassland, below any significant concentration of shrubs, also collected here: Rhus trilobata, Tragia ramosa, Eriogonum alatum, and Grindelia squarrosa. 29 Jul 2020. (CAS, CDA0053768^‡, UCR).
2429, Apex Park - Northern Parcel. East-central corner of park where multiple unnamed gulches join before flowing through Stonebridge HOA, 4.44 km. south of the GNIS location of Golden. Foothills grassland, with both foothills and riparian shrubland nearby, toe of small east-facing ridge with Helianthus pumilus, Artemisia dracunculus, and Koeleria maculata. 19 Aug 2020. (COLO2433803^‡, CS, JCOS s.n., UC).
2687, Salt Creek. South-facing hillside along Salt Creek and Pike-San Isabel National Forest Road 435 "Salt Creek Road," 3.2 mi. by road west of US Highway 285, 145 km. southwest of the GNIS location of Golden. Open hillside with pines, collected nearby: Hymenoxys richardsonii var. floribunda, and Muhlenbergia montana. Not in bloom when this site was visited on 12 July 2021 like the Hymenoxys was. 16 Aug 2021. (EIU, UCR, COLO2691962^‡, OBI183403^‡).
3193, Colorado School of Mines Survey Field. Top of northwest-facing slope overlooking an unnamed stream to the northwest, southeast quadrant of the Survey Field, 2.36 km. (geodesic) south of the GNIS location of Golden. Highest Great Plains mixed grass near Rocky Mountain Front Range scarp, also nearby: Senecio spartioides, Eriogonum effusum, and Cercocarpus montanus. 27 Aug 2023. (CAS, CS, EIU, CDA).
3221, Colorado School of Mines Survey Field. Northwest corner of the Survey Field, highest Great Plains at base of Rocky Mountain Front Range scarp, 1.92 km. southwest of the GNIS location of Golden With Bouteloua gracilis, Bromus inermis, Ambrosia psilostachya, and Helianthus pumilus. 17 Sep 2023. (COLO, REGIS, UCR, OBI).

Helenium bigelovii A. Gray.  Bigelow's Sneeze Weed.
1027, Walker Creek (Lower). Pumice Valley, along the bank of Walker Creek, just above the crossing of old US Highway 395, growing in the creek bank and hanging over the creek. 24 Jul 2013. (UC2045730^‡, UCR262134^‡).

Helianthella quinquenervis (Hook.) A. Gray.  Five-Nerve Little Sunflower.
1990, Chalk Creek. Along Chalk Creek, National Forest Road 134, off Colorado Highway 91, 13.3 km. northeast of the GNIS location of Leadville. 23 Jul 2018. (KHD00068684^‡, OBI158902^‡, UC, UCR ^‡).
2903, Unnamed Gulch on Forest Road 189. Along Forest Road 189, about 1 km. west of County Road 18 “East Tennessee Road,” 7.37 km. north northwest of the GNIS location of Leadville. Openings in aspen forest, mixed with patches of big sagebrush and willows. 21 Jul 2022. (CAS, COLO, CS, CDA).

Helianthus pauciflorus Nutt. ssp. subrhomboideus (Rydb.) O. Spring & E. Schilling.  (Syn: Helianthus rigidus (Cass.) Desf. ssp. subrhomboideus (Rydb.) Heiser , Helianthus subrhomboideus Rydb. ) Stiff Sunflower.
1260, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 15.2 km north northeast of Golden, 1.3 miles north of CO State Highway 72 on Plainview Road, 436 m. west of Plainview Road. 26 Jul 2015. (JCOS s.n., KHD00061672^‡, UCR267469^‡).
1267, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 15.8 km north northeast of Golden, 1.4 miles north of CO State Highway 72 on Plainview Road, 194 m. northeast of Plainview Road. 29 Jul 2015. (CAS, JCOS s.n., KHD00062160^‡, OBI83238^‡, UC).
1507, North Table Mountain Park. Near the top of several small hills (toe of landslide?) on the lower north slope of North Table Mountain, 0.7 km. southeast of the Mesa Spur Trailhead on 58th Avenue, 4.8 km. north northeast of the GNIS location of Golden. Also at this location: Thelesperma megapotamicum, Eriogonum alatum, and E. effusum. 22 Jul 2016. (COLO2299709^‡, CS, EIU028457^‡, JCOS s.n., KHD00063471^‡).
1557, Ranson/Edwards Homestead Open Space Park. 1.7 mi. west on CO Highway 72 Coal Creek Canyon Road, from CO Highway 93, 1.2 mi. north on Plainview Road, then 400 m. east of Plainview road, 15.3 km. north northwest of the GNIS location of Golden. Wet, almost swampy, area on the south side of an intermittent stream. 3 Sep 2016. (COLO02348290^‡, CS).
1716, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 1.7 miles west on Colorado Highway 72 from Colorado Highway 93, 0.8 miles north on Plainview Road, then 385 meters west into open prairie. 28 Jul 2017. (CDA0052325^‡, EIU, UCR 289261^‡).
2199, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 19.4 km. north northwest of the GNIS location of Golden, 1.6 mi. west on CO Hwy 72 from CO Hwy 93, 0.9 mi. north on Plainview Road, then 125 m. west into open prairie. Low, wet area. Also collected here: Solidago rigida var. humilis, nearby: Lactuca serriola, Sonchus asper, and Sporobolus heterolepis. 27 Aug 2019. (CAS, OBI186023^‡, REGIS, UC).
2223, Lippincott Ranch. Northernmost Jefferson County, parcel jointly owned by Jefferson County Open Space and City of Boulder OSMP, southwest segment of parcel, nearly up to the railroad tracks, 22.6 km. north northwest of the GNIS location of Golden. Steep east-facing grassy slope. Also collected here: Heliomeris multiflora var. multiflora. 29 Aug 2019. (KHD00074460^‡, REGIS).
3359, Ranson/Edwards Homestead Open Space Park. Near the southern edge of Ranson/Edwards, 1.7 mi. west on CO Hwy 72 from CO Hwy 93, then 0.9 mi generally north in Plainview Road, then 110 m. northwest into the field, 14.8 km. north of Golden Open fields with Bromus inermis and Artemisia ludoviciana; also seen or collected nearby Solidago rigida var. humilis, Opuntia fragilis, and Sisyrinchium montanum. 10 Aug 2024. (COLO, CS, Demo, CDA).
3364, Ranson/Edwards Homestead Open Space Park. 30 Aug 2024. (Undist.).

Helianthus pumilus Nutt.  Little Sunflower.
1199, Colorado School of Mines Survey Field. Northern portion of the Survey Field, near the road to city water tank from Lookout Mountain Road, 1.95 km south southwest of the GNIS location of Golden Highest plains at the base of Lookout Mountain. 12 Jul 2015. (CAS, KHD00062162^‡, UC, UCR267450^‡).
1210, North Table Mountain Park. Middle north slopes of North Table Mountain, above the North Table Loop trail, 3.9 km north northeast of the GNIS location of Golden. 13 Jul 2015. (JCOS s.n., KHD00062161^‡, UCR267451^‡).
1426, Deadman Gulch. 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. Northeast-facing grassy slope. 15 Jun 2016. (CS, EIU, OBI83310^‡).
1523, North Table Mountain Park. South side of North Table Mountain, along the Climbing Access Trail just below the uppermost basalt flow; 224 m. southeast of the USBR monument designated “North Table,” 1.44 km. north northeast of the GNIS location of Golden. 5 Aug 2016. (COLO02347920^‡, JCOS s.n., KHD00063462^‡, UC).
1704, North Washington Open Space. 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. East-facing slope near center of parcel. 14 Jul 2017. (CAS, CDA0052323^‡, KHD00065458^‡).
1715, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 1.7 miles west on Colorado Highway 72 from Colorado Highway 93, 0.8 miles north on Plainview Road, then 360 meters west into open prairie. Sunflower, long coarse hairs, a few disc flowers have reddish lobes. 28 Jul 2017. (EIU, JCOS s.n., KHD00065332^‡).
1973, Ranson/Edwards Homestead Open Space Park. Highest plains above Rocky Flats, 1.7 mi. west on CO Highway 72 from CO Highway 93, 1.4 mi. generally north on Plainview Road, then about 150 m. southwest onto a slightly dryer ridge above the road, 15.5 km. north northeast of the GNIS location of Golden. Also collected here: Eriogonum alatum. 13 Jul 2018. (COLO02347623^‡, CS, REGIS).
2106, Tin Cup Ridge. Top of the hogback locally called Tin Cup Ridge, the northward extension of Dinosaur Ridge into Golden, 6.42 km. south southeast of the GNIS location of Golden. Among shrubs and grasses typical of Front Range foothills. 30 Jun 2019. (CAS, JCOS s.n., KHD00070544^‡, OBI183233^‡, UCR).
2354, Dakota Ridge. 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. Also collected here: Bromus japonicus, and Nassella viridula, and nearby: Hypericum perforatum, Potentilla recta, and Muhlenbergia montana. 12 Jun 2020. (CDA0053752^‡, OBI149319^‡, REGIS).
2367, Colorado School of Mines Survey Field. Southern part of the Survey Field, high plains at the base of the Rocky Mountain Front Range, 3.18 km. south of the GNIS location of Golden Foothills grassland below shrubland; also here: Astragalus crassicarpus, Heterotheca villosa, and Hymenopappus filifolius. 20 Jun 2020. (CDA0053754^‡, COLO2434306^‡, CS, EIU).
2548, Apex Park - Northern Parcel. Lower slopes of the Front Range foothills, northeast quadrant of Apex Park, 4.45 km. south of the GNIS location of Golden. Grasslands below foothills scrub, collected nearby: Carduus nutans, Heterotheca villosa, Sphaeralcea coccinea, Linaria dalmatica, and Thinopyrum intermedium. 7 Jul 2021. (DEMO, REGIS, UC, JCOS).
2789, Apex Park - Northern Parcel. Along the northern border of the northwest corner, 250 m. from the northwest corner, and 4.37 km. south of the GNIS location of Golden. Shortgrass prairie with Artemisia frigida, A. ludoviciana, Heterotheca villosa, Opuntia polyacantha, Eriogonum umbellatum, Tradescantia occidentalis, and Bromus tectorum. 10 Jun 2022. (Akure, CDA, OBI, UCR, OBI).
3011, DeLong Park (City of Golden). In the natural area of a new city park (construction in 2021 and 2022), up on the slope above Welch Ditch and sidewalk, aligned with extension of 24th Street, 1.39 km. southeast of the GNIS location of Golden. In bloom. Likely to be native here, other likely natives seen: Opuntia macrorhiza, Comandra umbellata ssp. pallida and Carex inops ssp. heliophila. 29 Jun 2023. (CofG, COLO, EIU, CAS).
3179, Guy Gulch. Southwest side of County Road 70 and the gulch, 615 m. northwest of Centennial Ranch, 12.8 km. northwest of the GNIS location of Golden. Open southeast-facing slope of ridge above small gulch tributary to Guy Gulch. 31 Jul 2023. (CS, OBI, UCR, JCOS).

Heliomeris multiflora Nutt. var. multiflora.  Showy Golden Eye.
2210, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 1.6 mi. west on CO Hwy 72 from CO Hwy 93, 1.1 mi. north on Plainview Road, then 725 m. west to an ephemeral stream, 19.7 km. north northwest of the GNIS location of Golden. Edge of an emphemeral stream, with Lsyimachia ciliata, Mentha arvensis, and Lycopus americanus. 27 Aug 2019. (JCOS s.n., KHD00074463^‡, OBI183231^‡, UCR).
2224, Lippincott Ranch. Northernmost Jefferson County, parcel jointly owned by Jefferson County Open Space and City of Boulder OSMP, southwest segment of parcel, nearly up to the railroad tracks, 22.6 km. north northwest of the GNIS location of Golden. Steep east-facing grassy slope. Also collected here: Helianthus pauciflorus ssp. subrhomboideus. 29 Aug 2019. (CAS, CIBO, COLO2433480^‡, JCOS s.n., KHD00074459^‡).
2737, Apex Park - Northern Parcel. South side of an unnamed gulch, the largest of several that join to flow through the Stonebridge HOA, part way up the initial scarp of the Front Range, 4.61 km. south of the GNIS location of Golden. In shade of ponderosa pines, growing in Rhus trilobata. 1 Sep 2021. (CS, UC, JCOS).
3217, Guy Gulch. Southeast-facing hill slope abobe the gulch about 285 m. behind and northeast of the Centennial Ranch house, 12.2 km. (geodesic) northwest of the GNIS location of Golden. 8 Sep 2023. (EIU, OBI, REGIS, JCOS).
3228, Magpie Gulch. Mouth of Magpie Gulch on the southeast flank of Mount Galbraith, 1.72 km. (geodesic) west northwest of the GNIS location of Golden. Floor of gulch, full sun and high shade, with Symphyotrichum porteri, Cynoglossum officinale, Hypericum perforatum, Mentha spicata, Monarda fistulosa, and Rubus deliciosus. 19 Sep 2023. (CAS, CDA, COG, UCR).

Heliomeris multiflora Nutt. var. nevadensis (A. Nelson) W. F. Yates.  Nevada Golden Eye.
403, Magruder Mountain. West slope of Magruder Mountain, approximately ˝ mile south of Nevada Highway 266, 6˝ miles generally west of Lida, Nevada. Open area with Pinyons and Sagebrush. 25 May 2004. (UCR248649^‡).

Helminthotheca echioides (L.) Holub.  (Syn: Picris echioides L. ) Bristly Ox-Tongue.
1034, Jean Sweeney Open Space Preserve. Just inside the preserve, just east of the north end of Nason Street. Growing the the gravel of a former railroad roadbed. 31 Aug 2013. (CAS1203255^‡, OBI82090^‡, UC2045717^‡, UCR262297^‡).

Hemizonella minima (A. Gray) A. Gray.  Opposite-leaved Tarweed.
1194, Grant Lake. Sandy, dry northwest slope above Grant Lake, at the south end of Forest Road 01S30 “Grant Lake”, 125 m southeast of the nominal shore, and 25 m above nominal lake level. 26 Jun 2015. (UC2045759^‡).

Heterotheca foliosa (Nutt.) Shinners.  (Syn: Heterotheca villosa (Pursh) Shinners var. foliosa (Nutt.) V.L. Harms ) Hairy False Goldenaster.
1258, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 15.2 km north northeast of Golden, 1.3 miles north of CO State Highway 72 on Plainview Road, 295 m. west of Plainview Road. North-facing slope, south of the intermittent stream. 26 Jul 2015. (JCOS s.n., KHD00062163^‡, UCR267471^‡).
2177, Little Scraggy Peak. Buffalo Creek Recreation Area, northeast slopes of Little Scraggy Peak, fairly close to Little Scraggy trailhead, about 4 mi. south of town of Buffalo Creek by Cty Rd 126, 60 km. south of the GNIS location of Golden. Also collected here: Lithospermum multiflorum, Geranium caespitosum, Ipomopsis aggregata ssp. collina, Bromus pumpellianus, and Koeleria macrantha. Area generally disturbed by minerals prospecting, fuels reduction, and mountain biking recreation. 23 Jul 2019. (CIBO, COLO2434264^‡, JCOS s.n., KHD00070523^‡, OBI186016^‡).
2215, Lippincott Ranch. Northernmost Jefferson County, parcel jointly owned by Jefferson County Open Space and City of Boulder OSMP, among boulders on the south side of Bull Gulch, 22.9 km. north northwest of the GNIS location of Golden. Also collected here: Grindelia squarrosa, Pericome caudata, Senecio spartioides, Nepeta cataria, and Urtica dioica. 27 Aug 2019. (CIBO, COLO2433571^‡, JCOS s.n., KHD00074448^‡, OBI186068^‡).
2226, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, northwest corner of Ranson/Edwards, 1.7 mi. west on CO Hwy 72 from CO Hwy 93, 2.1 mi generally north on Plainview Road, then 350 m. west. Area with down, burned ponderosa pines, also collected here: Ceanothus fendleri, nearby Amorpha nana, Danthonia spicata, and Sorghastrum nutans. 10 Sep 2019. (CAS, CDA0052314^‡, REGIS, UC).
2641, Morrison Creek. Buffalo Creek Recreation Area, along Morrison Creek and former National Forest Road 547, 2.66 km. south of National Forest Road 550, 63.2 km. south of the GNIS location of Golden. Meadow, east side of Morrison Creek, in a small grove of aspen trees with Monarda fistulosa and Campanula rotundifolia. This “meadow” has a high concentration of down tree trunks, history unknown. 5 Aug 2021. (CS, EIU, UC, UCR).
2733.1, Apex Gulch. Beside the Apex Gulch Trail, 100-110 m. west of the trailhead, 5.86 km. south of the GNIS location of Golden. Possibly an intergrade between H. foliosa and H. villosa. 25 Aug 2021. (Golden).

Heterotheca grandiflora Nutt.  Telegraph Weed.
883, Harbor Bay Business Park, Alameda. In disturbed areas along North Loop Road. 17 Aug 2012. (CAS1157898^‡, CDA39626^‡, UC).

Heterotheca pumila (Greene) Semple.  Alpine False Goldenaster.
1986, Chalk Creek. Along Chalk Creek, National Forest Road 134, off Colorado Highway 91, 13.3 km. northeast of the GNIS location of Leadville. 23 Jul 2018. (KHD00068683^‡, OBI158899^‡, UCR ^‡).
3105, West Tennessee Creek. Lowest terrace above West Tennessee Creek, 588 m. (geodesic) southeast of Lily Lake, 12.3 km. (geodesic) north northwest of Leadville. First terrace above creek, sunny and dry, with Arenaria sp. and Erigeron sp. 18 Jul 2023. (COLO, CS, CAS).

Heterotheca villosa (Pursh) Shinners.  (Syn: H. v. (Pursh) Shinners var. nana (A. Gray) Semple , H. v. (Pursh) Shinners var. villosa ) Hairy False Goldenaster.
1055, 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. 10 Aug 2014. (CAS, UC2045980^‡, UCR266872^‡).
1209, North Table Mountain Park. Lower north slopes of North Table Mountain, between the Tablerock Trail and North Table Loop, 4.0 km north northeast of the GNIS location of Golden. 13 Jul 2015. (CS, JCOS s.n., KHD00062155^‡, OBI83171^‡).
1221, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 15.2 km north northeast of Golden, 1.3 miles north of CO State Highway 72 on Plainview Road, 60 m. west of Plainview Road. Thinly vegetated rocky alluvial terrace. 16 Jul 2015. (JCOS s.n., KHD56974^‡, UC, UCR267453^‡).
1293, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 16.25 km north northwest of Golden, 1.8 miles north of CO State Highway 72 on Plainview Road, then 185 m. west southwest of Plainview Road. 9 Sep 2015. (JCOS s.n., KHD56975^‡, UC, UCR267488^‡).
1521, North Table Mountain Park. Lower north slopes of North Table Mountain, 1.02 km. southwest of the Mesa Spur trailhead on 58th Avenue, 4.66 km. north northeast of the GNIS location of Golden. Mixed grasses and forbs upslope of North Table Loop. 29 Jul 2016. (EIU028181^‡, JCOS s.n., KHD00063461^‡, OBI83315^‡).
1664, North Washington Open Space. 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. Top of hill, center of parcel. Somewhat ambiguous as to var. minor vs. var. nana. 16 Jun 2017. (CDA0050017^‡, EIU, KHD00065487^‡).
1942, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 1.7 mi. west on CO Highway 72 Coal Creek Canyon Road from CO Highway 93, 1.6 mi. generally north on Plainview Road, then 10 m. northeast, 15.75 km. north northwest of the GNIS location of Golden. 14 Jun 2018. (COLO02347599^‡, REGIS).
1967, Kinney Run. 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. Var. minor if infraspecific names are to be applied. 6 Jul 2018. (COLO02348571^‡, KHD00068682^‡, OBI, UC).
2097, Tin Cup Ridge. East base of the hogback locally called Tin Cup Ridge, the northward extension of Dinosaur Ridge into Golden, 6.4 km. south southeast of the GNIS location of Golden. Mixed grasses and forbs. Collected with Aegilops cylindrica, Erigeron tracyi, Melilotus officinalis, Nassella viridula, and Poa compressa. Probably var. minor if infraspecific names are to be applied. 30 Jun 2019. (CAS, CS, JCOS s.n., KHD00070808^‡).
2113, Lippincott Ranch. Northernmost Jefferson County, parcel jointly owned by Jefferson County Open Space and City of Boulder OSMP, open wet prairie in southeast portion, 21.7 km. north northwest of the GNIS location of Golden. At edge of small creek; also collected here: Dianthus armeria, Prunella vulgaris, Potentilla recta, and Veronica anagallis-aquatica. Variety minor if infraspecific names are to be applied. 1 Jul 2019. (CDA0052296^‡, CIBO, JCOS s.n., KHD00070537^‡).
2358, Dakota Ridge. 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. Open herbaceous vegetation, ponderosa pines and mountain mahogany shrubland nearby. Also collected here: Koeleria macrantha, Hesperostipa comata, and Eriogonum umbellatum var. umbellatum. 12 Jun 2020. (COLO2434165^‡, REGIS).
2368, Colorado School of Mines Survey Field. Southern part of the Survey Field, high plains at the base of the Rocky Mountain Front Range, 3.18 km. south of the GNIS location of Golden Foothills grassland below shrubland; also here: Astragalus crassicarpus, Helianthus pumilus, and Hymenopappus filifolius. 20 Jun 2020. (CAS, CDA0053755^‡, CS, EIU).
2549, Apex Park - Northern Parcel. Lower slopes of the Front Range foothills, northeast quadrant of Apex Park, 4.45 km. south of the GNIS location of Golden. Grasslands below foothills scrub, collected nearby: Carduus nutans, Helianthus pumilus, Sphaeralcea coccinea, Linaria dalmatica, and Thinopyrum intermedium. 7 Jul 2021. (REGIS, UCR, JCOS, OBI183415^‡).
3376, Dispersed Camp Site. 12 Sep 2024. (Undist.).

Heterotheca villosa (Pursh) Shinners var. nana (A. Gray) Semple.  (Syn: Chrysopsis canescens DC. var. nana A. Gray ) (=Heterotheca villosa (Pursh) Shinners) Hairy False Golden Aster.
3178, Guy Gulch. Southwest side of County Road 70 and the gulch, 618 m. northwest of Centennial Ranch, 12.8 km. northwest of the GNIS location of Golden. Open southeast-facing slope above small gulch tributary to Guy Gulch. 31 Jul 2023. (COLO, CS, EIU, JCOS).

Hieracium albiflorum Hook.  White-Flower Hawkweed.
2150, Lippincott Ranch. Northernmost Jefferson County, parcel jointly owned by Jefferson County Open Space and City of Boulder OSMP, southwest corner near the railroad tracks, 22.3 km. north northwest of the GNIS location of Golden. In ponderosa pine woodland, thick forest duff, with Juniperus communis and J. scopulorum, and Berberis repens. Most plants show some evidence of herbivory. 13 Jul 2019. (CIBO, JCOS s.n., KHD00072738^‡).

Hulsea vestita A. Gray ssp. vestita.  Pumice Alpinegold.
464, Big Sand Flat. Collected at the base of the slope on the northwest side of Big Sand Flat, the opposite side of the flat from California Highway 120, about 13 1/2 miles east of US Highway 395. Also collected at this site: Abronia turbinata, Calyptridium umbellatum, Lupinus duranii, and Mimulus nanus var. mephiticus. 25 Jun 2007. (CAS1131478^‡, UC1980443^‡).
641, Big Sand Flat. In very soft sandy soil near mouth of Dry Creek where it enters Big Sand Flat, and near California Highway 120. 5 Jul 2010. (UC1973786^‡).

Hymenopappus filifolius Hook. var. cinereus (Rydb.) I. M. Johnst.  Fine Leaved Wooly White.
3095, Salt Creek. Along the fence line, about 636 m. northeast of the crossing of Salt Creek by Forest Road 435 “Salt Creek Road,” 3.0 mi. by road west of US Highway 285, 111 km. southwest of Golden. In stiff, dry soil that appears subject to sheet flow, with: Penstemon teucroides and Packera fendleri. 17 Jul 2023. (CS, OBI, UCR, KHD ^‡).

Hymenopappus filifolius Hook. var. polycephalus (Osterh.) B.L. Turner.  Many-Headed Fine-Leaved Wooly-White.
1427, Deadman Gulch. 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. East-facing grassy slope. Deadman Gulch is often referred to by the locally euphemistic name of “Kinney Run.” 15 Jun 2016. (KHD00063989^‡, UC, UCR278000^‡).
1504, North Table Mountain Park. Lower slopes on the west side of North Table Mountain, along side of North Table Loop, just a few meters north of the access road to the trailhead, 3.2 km. north northwest of the GNIS location of Golden. 13 Jul 2016. (EIU028681^‡, JCOS s.n., KHD00063468^‡, OBI83338^‡).
1663, North Washington Open Space. 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. In a slightly more exposed area on the south side of the hill where there are fewer non-natives and less disturbance. 16 Jun 2017. (CDA50018^‡, KHD00065488^‡).
2369, Colorado School of Mines Survey Field. Southern part of the Survey Field, high plains at the base of the Rocky Mountain Front Range, 3.16 km. south of the GNIS location of Golden East-facing slope with low forbs and grasses in foothills grassland below shrubland; also collected here: Astragalus crassicarpus, Helianthus pumilus, and Heterotheca villosa. 20 Jun 2020. (CAS, COLO2434314^‡, CS, OBI149311^‡, REGIS).
2815, Tin Cup Ridge. Lower east slope of the hogback locally called Tin Cup Ridge, the northward extension of Dinosaur Ridge into Golden, 6.33 km. south southeast of the GNIS location of Golden. Mixed grasses and forbs with: Rhus trilobata, Artemisia ludoviciana, Heterotheca villosa, Amelanchier alnifolia, and Bromus japonicus. 28 Jun 2022. (Akure, CAS, UCR, JCOS).

Hymenothrix dissecta (A. Gray) B. G. Baldwin.  (Syn: Amauriopsis dissecta (A. Gray) Rydb. , Bahia dissecta (A. Gray) Britton ) Ragleaf Bahia.
3374, Dispersed Camp Site. 12 Sep 2024. (Undist.).

Hymenoxys cooperi (A. Gray) Cockerell.  Cooper's Rubberweed.
289, Wild Horse Mesa. Mid-slope on the north slopes of Wild Horse Mesa, 3.4 miles west northwest of Hole-in-the-Wall, and 8.2 miles north northeast of Mitchell Caverns. 26 May 2001. (Golden).

Hymenoxys richardsonii (Hook.) Cockerell var. floribunda (A. Gray) Parker.  (Syn: Picradenia richardsonii Hooker var. floribunda (A. Gray) Weber ) Colorado Rubberweed.
2189, Trout Creek Pass. Along Chaffee County Road 311, about 0.8 mi. west of its intersection with US Highway 285 at Trout Creek Pass, 149 km. southwest of the GNIS location of Golden. 5 Aug 2019. (CAS, KHD00070555^‡, OBI186020^‡, REGIS, UCR).
2564, Salt Creek. South-facing hillside along Salt Creek and Pike-San Isabel National Forest Road 435 "Salt Creek Road," 3.2 mi. by road west of US Highway 285, 145 km. southwest of the GNIS location of Golden. Open hillside with pines, also collected here: Oreocarya thyrsiflora, Penstemon barbatus, Chaenactis douglasii, Gutierrezia sarothrae, and Muhlenbergia montana. 12 Jul 2021. (CAS, CDA, CS, DEMO, UC, UCR, COLO2706398^‡, KHD00075409^‡, OBI183724^‡).
2686, Salt Creek. South-facing hillside along Salt Creek and Pike-San Isabel National Forest Road 435 "Salt Creek Road," 3.2 mi. by road west of US Highway 285, 145 km. southwest of the GNIS location of Golden. Open hillside with pines, collected nearby: Gutierrezia sarothrae, and Muhlenbergia montana. Also collected just up the slope in flower on 12 July 2021. 16 Aug 2021. (EIU, JCOS, COLO2706331^‡, KHD00075273^‡).

Ionactis alpina (Nutt.) Greene.  (Syn: Aster scopulorum A. Gray ) Lava Ankle-Aster.
966, Bridgeport Canyon. Along Coyote Springs Road, about ⅓ mile southeast of the pass, at a watercourse crossing the road from southwest to northeast, 6˝ miles by road north of California Highway 167. 22 May 2013. (CAS1161740^‡, UC, UCR250005^‡).

Iva axillaris Pursh.  (Syn: I. a. Pursh ssp. robustior (Hook.) Basset ) Povertyweed.
895, Coyote Spring. 60 m west of Coyote Spring in Bridgeport Canyon, 4.1 miles by road, north northwest of the intersection of Cottonwood Canyon Road and California Highway 167. 24 Aug 2012. (CAS1157593^‡, UC).

Lactuca serriola L.  Prickly Lettuce.
911, Mount Trashmore, Alameda. Along the Veterans Court bicycle path, very close to the southern landing of the Bay Farm bicycle bridge on Bay Farm Island. 4 Oct 2012. (CDA40527^‡, UC).
1548, North Table Mountain Park. South rim of North Table Mountain, in the Golden Cliffs Trail where it passes through the uppermost basalt flow, 260 m. north of the Golden Cliffs trailhead, 1.5 km. north northeast of the GNIS location of Golden. Growing in cracks in the basalt of the upper flow, plentiful in rocks and in soil below. Introduced. 1 Sep 2016. (CS, EIU, EIU, JCOS s.n., KHD00064004^‡).
1749, North Washington Open Space. 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. Large, against neighbor's fence, maybe getting watered with neighbor's landscaping. 31 Aug 2017. (CDA0052329^‡, JCOS s.n., KHD00065360^‡).
2200, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 19.4 km. north northwest of the GNIS location of Golden, 1.6 mi. west on CO Hwy 72 from CO Hwy 93, 0.9 mi. north on Plainview Road, then 150 m. west into open prairie. Dense colony of small plants in dried wetland, with Iris missouriensis and Epilobium sp.. 27 Aug 2019. (JCOS s.n., KHD00070530^‡, OBI186031^‡, UCR).
2778, DeLong Park (City of Golden). New city park (construction in 2021 and 2022) near the intersection of 23rd Street and Vernon Drive, 1.75 km. southeast of the GNIS location of Golden. 6 May 2022. (Golden).
2821, Lippincott Ranch. About mid-way between Bull Gulch and the county boundary, 1.74 km. north northwest of the main gate, 23.4 km. north northwest of Golden. Edge of a dry watercourse, in deep ponderosa pine forest duff. Also collected here: Symphoricarpos rotundifolius and Viola sp., cf. V. canadensis. 2 Jul 2022. (CIBO, JCOS).

Lactuca tatarica (L.) C.A.Mey. var. pulchella (Pursh) Breitung.  (=Mulgedium pulchellum (Pursh) G. Don in R. Sweet) Blue Lettuce.
2691, Salt Creek. South-facing hillside along Salt Creek and Pike-San Isabel National Forest Road 435 "Salt Creek Road," 3.2 mi. by road west of US Highway 285, 145 km. southwest of the GNIS location of Golden. Open hillside with ponderosa pines, collected nearby: Chaenactis douglasii, Erigeron subtrinervis, Gutierrezia sarothrae, and Hymenoxys richardsonii var. floribunda. 16 Aug 2021. (KHD00075270^‡, OBI183401^‡).

Lactuca virosa L.  Bitter Lettuce.
1036, Jean Sweeney Open Space Preserve. In open grasslands of the preserve, about 240 m east of the center of Constitution Way, 70 m. northeast of the end of 8th Street, and 65 m. northwest of the end of Nason Street. 31 Aug 2013. (CAS1202611^‡, UC2045715^‡, UCR262299^‡).

Laennecia schiedeana (Lessing) G. L. Nesom.  Pineland Marshtail.
2242, Little Scraggy Peak. Buffalo Creek Recreation Area, northeast slopes of Little Scraggy Peak, 2.04 km. southwest of the Little Scraggy trailhead, 61.2 km. south of the GNIS location of Golden. Also collected here: Juniperus scopulorum, Chenopodium fremontii, Dieteria bigelovii, and Erigeron subtrinervis. Area generally disturbed by minerals prospecting, fuels reduction, and mountain biking recreation. 16 Sep 2019. (Golden).

Layia glandulosa (Hook.) Hook. & Arn.  White Daisy Tidy Tips.
95, Wild Horse Mesa. North slope of Wild Horse Mesa, 3.7 miles west of Hole-in-the-Wall, 7.5 miles north northeast of Mitchell Caverns. 29 April 1997. (Golden, Zzyzx s.n.).
274, Wild Horse Mesa. 3.4 miles west northwest of Hole-in-the-Wall, 8 miles north northeast of Mitchell Caverns. East facing slope on Precambrian gneiss and schist with Pinus monophylla, Juniperus osteosperma, and Coleogyne ramosissima. 24 April 2001. (Golden, Zzyzx s.n.).

Layia platyglossa (Fischer & C. Meyer) A. Gray.  Coastal Tidytips.
302, Shell Creek. Along Shell Creek Road, about 1.7 miles north of California Highway 58. Grazed grassland with few oaks. 25 Jun 2002. (?).

Leucanthemum vulgare (Vaill.) Lam.  (Syn: Chrysanthemum leucanthemum L. ) Ox-eye Daisy. Weed: CO, CO DofA, List: B.
3289, Coal Creek Canyon Study Area, Lacey Parcel. streamside sand 3 Jul 2024. (Undist.).
3290, Coal Creek Canyon Study Area, Lacey Parcel. Dry ephemeral sandy stream channel 3 Jul 2024. (Undist.).

Liatris punctata Hook.  Dotted Blazing Star.
1264, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 15.8 km north northeast of Golden, 1.4 miles north of CO State Highway 72 on Plainview Road, 150 m. northeast of Plainview Road. 29 Jul 2015. (JCOS s.n., KHD56976^‡, UC).
1536, North Table Mountain Park. Lower north slopes of North Table Mountain, along the Tablerock Trail, 1.0 km. south of the Mesa Spur trailhead on W. 58th Avenue, 4.2 km. north northwest of the GNIS location of Golden. Mixed grasses and forbs. 18 Aug 2016. (COLO02348639^‡, CS, EIU, JCOS s.n., KHD00063460^‡, OBI83314^‡).
1736, North Table Mountain Park. Northwest corner of North Table Mountain, lower elevation lobe of the mesa, formed on top of the oldest basalt flow embedded in the Denver Formation, 3.1 km. north of the GNIS location of Golden. Grassy gentle slope, this plant is an early bloomer among its species here. 15 Aug 2017. (JCOS s.n., KHD00065321^‡, UCR ^‡).
1747, North Washington Open Space. 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 section, in deep grasses (mostly smooth brome) and other weeds. 31 Aug 2017. (CAS, KHD00065355^‡).
2220, Lippincott Ranch. Northernmost Jefferson County, parcel jointly owned by Jefferson County Open Space and City of Boulder OSMP, north segment of parcel, south side of Bull Gulch, 22.9 km. north northwest of the GNIS location of Golden. Drier rocky knoll at edge of ponderosa pine woodland. 29 Aug 2019. (CIBO, JCOS s.n., KHD00074464^‡, OBI186064^‡, REGIS).
2405, Dakota Ridge. 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. 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. 29 Jul 2020. (CDA0053770^‡).
2428, Apex Park - Northern Parcel. East-central corner of park where multiple unnamed gulches join before flowing through Stonebridge HOA, 4.44 km. south of the GNIS location of Golden. Foothills grassland, with both foothills and riparian shrubland nearby, open southeast-facing slope with Heterotheca villosa, and Hesperostipa comata. 19 Aug 2020. (CAS, CDA0053778^‡, JCOS s.n., UCR).
2675, Tin Cup Ridge. On a small knoll at the east base of the hogback locally called Tin Cup Ridge, the northward extension of Dinosaur Ridge into Golden, 6.3 km. south southeast of the GNIS location of Golden. 10 Aug 2021. (CS, UC, COLO2706562^‡).
3195, Colorado School of Mines Survey Field. Small divide between two unnamed streams, southeast quadrant of Survey Field, 2.23 km. (geodesic) south of the GNIS location of Golden. Highest Great Plains at Rocky Mountain Front Range scarp, more or less disturbed mixed grass, where some quarrying has occurred, also collected here: Cleomella serrulata, Salsola tragus and Eriocoma hymenoides. 27 Aug 2023. (COLO, EIU, UCR, OBI).

Madia glomerata Hook.  Mountain Tarweed.
894, Bodie Hills. Outside the Mono Lake basin, along Coyote Springs Road, 0.9 miles south of California Highway 270. This collection was an attempt to relocate Tim Messick #1155 of Madia gracilis (HSC81306). 24 Aug 2012. (UC).
902, Reversed Creek. In a open field at the west end of Minaret Road, Peterson Tract, south of the Reverse Creek Lodge, and 2 miles west of the town of June Lake (as measured from the Tiger Bar). Open sunny waste place that may have been mowed earlier in the season. 25 Aug 2012. (CAS1157699^‡, UC, UCR248615^‡).
3366, Ranson/Edwards Homestead Open Space Park. More seen just east (downstream) of the reservoir. 30 Aug 2024. (Undist.).

Matricaria discoidea DC.  Disc Mayweed, Pinapple Weed..
3286, Coal Creek Canyon Study Area, Lacey Parcel. Streamside, in a veritable rogues' gallery of weeds: Cynoglossum officinale, Hypericum perforatum, Potentilla recta, Verbascum thapsus, and Dactylis glomerata. 3 Jul 2024. (Undist.).

Nothocalais cuspidata (Pursh) Greene.  Prairie False Dandelion.
1095, North Table Mountain Park. Beside North Table Loop, just south of intersection with Tilting Mesa Trail. “Wavy-leaved dandelion,” open prairie on top of mesa, common. 30 Apr 2015. (JCOS s.n., KHD56903^‡, UC2045768^‡).
1791, Colorado School of Mines Survey Field. Distributed broadly across upper surface of small alluvial hill, near the center of the Survey Field, 2.22 km, south of the GNIS location of Golden. 24 Apr 2018. (CAS, KHD00068681^‡, OBI124856^‡, UCR ^‡).
2283, Apex Park - Northern Parcel. Along the eastern edge of the Apex Park - North parcel, small, north-facing ridge, 75 m. north of the water tank, 4.81 km. south of the GNIS location of Golden. Among grasses below foothills shrubland; collected nearby: Chorispora tenella, Prunus virginiana, Antennaria parvifolia, and Senecio integerrimus. There were no N. cuspidata to be found in the nearby infestation of smooth brome. 18 May 2020. (COLO2433795^‡, JCOS s.n., KHD00073452^‡).
2759, Dakota Ridge. Lower western slope of hogback in northernmost Golden, 4.2 km. north northwest of the GNIS location 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. 26 Apr 2022. (Golden).

Onopordum acanthium L.  Scotch Cottonthistle. Weed: CA, CAL-IPC, List: High. CA, CO DofA, List: B. CO, CO DofA, List: B.
2772, DeLong Park (City of Golden). New city park (construction in 2021 and 2022) near the intersection of 23rd Street and Vernon Drive, 1.75 km. southeast of the GNIS location of Golden. 6 May 2022. (Golden).
2776, DeLong Park (City of Golden). New city park (construction in 2021 and 2022) near the intersection of 23rd Street and Vernon Drive, 1.75 km. southeast of the GNIS location of Golden. The leaves have been lightly brushed to remove sand, but this has affected the tomentum. Colorado Noxious Weed List B. 6 May 2022. (Golden).

Oreochrysum parryi (A. Gray) Rydb.  Goldenrod.
2717, Brumley. Subalpine forest on a bank between the access road to the Sno-Tel station and the highway, about 11 road miles generally west on Colorado Highway 82 from the town of Twin Lakes, 175 km. southwest of Golden. One of three “goldenrods” growing together, the others are Solidago multiradiata and S. simplex. Brumley was a stage stop on the route across Independence Pass. 18 Aug 2021. (UCR, COLO2706307^‡, KHD00075285^‡, OBI183792^‡).

Packera crocata (Rydb.) W. A. Weber & A. Love.  Saffron Ragwort.
1997, Brumley. On a terrace beside the North Fork of Lake Creek, between Twin Lakes and Independence Pass, about 11 mi. generally west on Colorado Highway 82 from the town of Twin Lakes. Brumley was a stage stop on the route across Independence Pass. 24 Jul 2018. (OBI124861^‡, UCR ^‡).
3107, West Tennessee Creek. In a meadow just north of West Tennessee Creek, 580 m. southwest of Lily Lake, 12.6 km. northwest of the GNIS location of Leadville. Also collected here: Caltha chionophila. 18 Jul 2023. (COLO, CS, KHD ^‡, OBI^‡).

Packera fendleri (A. Gray) W.A. Weber & Á. Löve.  (Syn: Senecio fendleri A. Gray ) Fendler’s Ragwort.
1817, North Washington Open Space. 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. 12 May 2018. (KHD00068678^‡).
1902, Little Scraggy Peak. Buffalo Creek Recreation Area, northeast slopes of Little Scraggy Peak, 46.5 km. south of the GNIS location of Golden. 31 May 2018. (CAS, KHD00068679^‡, OBI148903^‡).
2044, Deadman Gulch. 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. 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. 2 Jun 2019. (COLO2434769^‡, KHD00071096^‡, OBI ^‡, UCR).
2518, Morrison Creek. First canyon west of Little Scraggy Peak, 1.43 km. south of NF 550 “Redskin Creek Road,” 62.0 km. south of the GNIS location of Golden. Among boulders on small ridge, east side of Morrison Creek. Open forest. 23 Jun 2021. (CS, REGIS, UC, CDA).
2798, Edgar Mine. 116 m. east southeast of the mine portal, 1.39 km. west northwest of the GNIS location of Idaho Springs. South-facing, open rocky slope, with Juniperus scoparia and Cercocarpus montanus. Collected while collecting approximate topotypes of Physaria vitulifera (P. A. Rydberg, s.n., 26 Aug 1895, NY185631, NY185632, RM1987). 13 Jun 2022. (OBI, CS, OBI, KHD00079756^‡).
2858, Little Scraggy Peak. In a meadow at the saddle between Morrison Creek and Gunbarrel Creek, 1.52 km. west northwest of Kelsey Campground, and 1.24 km. southwest of Little Scraggy Peak. Open meadow with a few ponderosa pines, also seen or collected here: Frasera speciosa, Lithospermum multiflorum, and Ceanothus fendleri. 12 Jul 2022. (Akure, COLO, EIU, UCR).
2861, Salt Creek. Small valley north of Salt Creek, formerly accessed by recently closed Forest Road 435A, 6.85 km. northwest of Antero Junction, 22.3 km. northeast of Buena Vista. Sparse vegetation on a sheetflow slope below a small hill with junipers and pines. Also collected here: Penstemon teucrioides and Bromus porteri. 18 Jul 2022. (CDA, CS, EIU, CAS).
3162, Guy Gulch. North of Guy Gulch, accessed by a ranch road off of Pyrenees Lane, 63 m. southeast of the line shack, 1.05 km. west southwest of Mt. Tom, 13.65 km. (geodesic) northwest of the GNIS location of Golden. On an old road through forest of aspen, spruce and ponderosa pine, with Sedum lanceolatum, Oxytropis lambertii, Penstemon glaber var. alpinus, and Koeleria macrantha. 26 Jul 2023. (CAS, COLo, UCR, JCOS).
3263, Centennial Cone Park. Helianthus pumilis, Erysimum capitatum, Linum lewisii, Erigonum alatum 14 Jun 2024. (Undist.).

Packera multilobata (Torr. & A. Gray) W. A. Weber & Á. Löve.  (Syn: Senecio multilobatus A. Gray ) Lobeleaf Groundsel.
104, Wild Horse Mesa. North face of Wild Horse Mesa, at the water tank, 3.5 miles west northwest of Hole-in-the-Wall, 8.25 miles north northeast of Mitchell Caverns. . (Golden, UC).
175, Lobo Point. Valley floor near Lobo Point, 1˝ miles west northwest of Hole-in-the-Wall, and 9 miles north northeast of Mitchell Caverns. 29 May 1999. (Golden, Zzyzx s.n.).

Packera plattensis (Nuttall) W. A. Weber & Á. Löve.  (Syn: Senecio plattensis (Packera) Nutt. ) Prairie Groundsel.
1914, Ranson/Edwards Homestead Open Space Park. 1.7 mi. west on CO Highway 72 Coal Creek Canyon Road from CO Highway 93, 1 mi. generally north on Plainview Road, then 60 m. east into field. Drier southeast-facing slope. 3 Jun 2018. (CAS, JCOS s.n., KHD00068680^‡, UC).
2064, Lippincott Ranch. Northernmost Jefferson County, parcel jointly owned by City of Boulder and Jefferson County Open Space, approximate centroid of parcel, 22.4 km. north northwest of the GNIS location of Golden. South margin of a small meadow in saddle between hogback and flatiron, quite wet from runoff of the meadow. 6 Jun 2019. (CAS, CIBO, JCOS s.n., KHD00072528^‡).
2085, Lippincott Ranch. Northernmost Jefferson County, parcel jointly owned by Jefferson County Open Space and City of Boulder OSMP, narrows of the parcel between central and southeast portions, 21.8 km. north northwest of the GNIS location of Golden. South-facing slope with grasses and forbs. 17 Jun 2019. (CAS, CIBO, JCOS s.n., KHD00070527^‡).
3244, Hildebrand Ranch Park. small groups of 2-4 plants scattered across the lowest slope of the hogback. 14 May 2024. (Undist.).

Packera tridenticulata (Rydb.) W.A. Weber & Á. Löve.  (Syn: Senecio tridenticulatus Rydb. ) Three-Tooth Ragwort.
1643, North Washington Open Space. 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. Top of hill, among most intact area of native vegetation. 30 May 2017. (CS, KHD00065490^‡).

Packera werneriifolia (A. Gray) W. A. Weber & Á. Löve.  (Syn: Senecio werneriifolius (A. Gray) A. Gray ) Hoary Groundsel.
2467, Hankins Gulch. Slopes above Hankins Gulch near its mouth on Goose Creek, area burned by Hayman fire of 2002, 86 km. south-southwest of Golden. Downed ponderosa pines, with Erigeron vetensis, E. compositus, Clematis columbiana, Cymopterus anisatus, and Arctostaphylos uva-ursi. 23 May 2021. (KHD00075610^‡, OBI185089^‡).
3040, Guy Gulch. Open shade on a forested hillside above Guy Gulch, 290 m. southwest of County Road 70, 1.15 km. (geodesic) northwest of Centennial Ranch house, 13.4 km. (geodesic) northwest of the GNIS location of Golden. Gentle north-facing slope in Douglas fir forest with little to no middlestory. 3 Jul 2023. (Golden, KHD ^‡).

Pericome caudata A. Gray.  Mountain Tail-Leaf.
2212, Lippincott Ranch. Northernmost Jefferson County, parcel jointly owned by Jefferson County Open Space and City of Boulder OSMP, among boulders on the south side of Bull Gulch, 22.9 km. north northwest of the GNIS location of Golden. 29 Aug 2019. (CIBO, JCOS s.n., KHD00074453^‡, OBI186069^‡, REGIS).
2744.1, Lippincott Ranch. Southwest corner of the ranch, 1.11 km. west northwest of the main gate, 22.3 km. north northwest of the GNIS location of Golden. On loose rock of the embankment below the Union Pacific Railroad, in the partial shade of a cottonwood and rocky mountain maples. Lippincott Ranch is jointly owned by City of Boulder Open Space and Mountain Parks and Jefferson County Open Space. 7 Sep 2021. (CDA, CIBO, UCR, JCOS).
3361, Clear Creek Canyon Park. GPS data inaccurate because of deep canyon, location placed 25 m. southwest of GPS reading per GoogleEarth. 14 Aug 2024. (Undist.).

Porophyllum gracile Benth.  Odora.
379, Mesquite Mountains. Near Kingston Road, 2.25 mi (3.62 km) north northeast of Winters Pass, 69 km southwest of Las Vegas, Nevada. 22 April 2004. (UC1953382^‡).

Psathyrotes annua (Nutt.) A. Gray.  Annual Psathyrotes.
525, Mono Lake. On the southwest shore of Mono Lake, 0.75 mi (1.2 km) northwest of South Tufa. 2 Aug 2007. (CAS1121457^‡, UC1973755^‡).

Pseudognaphalium canescens (DC.) Anderberg.  (Syn: P. canescens (DC.) W. A. Weber [illeg.] ) Wright's Rabbit-Tobacco.
1549, North Table Mountain Park. South rim of North Table Mountain, in the Golden Cliffs Trail where it passes through the uppermost basalt flow, 260 m. north of the Golden Cliffs trailhead, 1.5 km. north northeast of the GNIS location of Golden. Growing in cracks in the basalt of the upper flow, very few seen. 1 Sep 2016. (KHD00064001^‡).
2403, Dakota Ridge. 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. Sedimentary rock outcrops and foothills shrubland, also collected nearby: Linaria canadensis var. texana, Physaria montana, and Viola nuttallii. 29 Jul 2020. (COLO2433837^‡, OBI149099^‡).
2745, Lippincott Ranch. Along the western parcel boundary, just north of the power line, at the base of a rock outcrop below the Union Pacific railroad, 1.16 km. northwest of the main gate, 22.6 km. north northwest of the GNIS location of Golden. Lippincott Ranch is jointly owned by City of Boulder Open Space and Mountain Parks and Jefferson County Open Space. 7 Sep 2021. (CIBO, UCR, JCOS).
2839, Lippincott Ranch. In the saddle between Spring Brook and Bull Gulch drainages, very close to the Boulder/Jefferson County boundary, 2.11 km. north northwest of the main gate, 2.78 km. south southwest of the GNIS location of Eldorado Springs. Open ponderosa pine woodland. Lippincott Ranch is jointly owned by City of Boulder Open Space and Mountain Parks and Jefferson County Open Space. 2 Jul 2022. (REGIS, CS).

Pseudognaphalium luteoalbum (L.) Hilliard & B. L. Burtt.  Jersey Cudweed.
322, Towata Park, City of Alameda. In the vacant lot across Bridgeview Isle from Towata Park, near Bay Farm Bridge abutment on Otis Drive (California Highway 61). 5 June 2003. (CAS1157589^‡, CDA39236^‡, UC).

Pseudognaphalium macounii (Greene) Kartesz.  Macoun’s Rabbit-Tobacco.
1257, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 15.2 km north northeast of Golden, 1.3 miles north of CO State Highway 72 on Plainview Road, 260 m. west of Plainview Road. Gentle south-facing slope away from intermittent stream. 26 Jul 2015. (JCOS s.n., KHD56977^‡, UCR267470^‡).
2741, Lippincott Ranch. Southwest corner of the ranch, 1.10 km. west northwest of the main gate, 22.3 km. north northwest of the GNIS location of Golden. Loose rock on an embankment below the Union Pacific Railroad, just coming out of the shade from the ponderosa pine woodland to the south. Lippincott Ranch is jointly owned by City of Boulder Open Space and Mountain Parks and Jefferson County Open Space. 7 Sep 2021. (KHD00075266^‡).

Psilostrophe cooperi (A. Gray) E. Greene.  Cooper's Paper Daisy.
202, Pinto Mountain. 289 km northeast of Los Angeles, California. South slope of the mountain. 26 September 1999. (UC(TAS), Zzyzx s.n.).

Pyrrocoma racemosa (Nutt.) Torr. & A. Gray var. paniculata (Nutt.) Kartesz & Gandhi.  Clustered Goldenweed.
710, Big Sand Flat. Wet area where Dry Creek enters Big Sand Flat. 26 Aug 2010. (UC1980421^‡).

Rafinesquia californica Nutt.  California Chicory.
331, Shadow Valley. In Creosote Bush scrub, on Kingston Road about 0.4 mi north of the intersection with Excelsior Mine Road, climbing to Winters Pass in the Mesquite Mountains. 20 April 2004. (CAS1131496^‡, UC2015256^‡).

Rafinesquia neomexicana A. Gray.  Desert Chicory.
1569, Shadow Valley. On the now closed road to Kingston Wash, 12.6 miles north on Cima Road, Kingston Road, and then Excelsior Mine Road from the intersection of US Interstate 15 and Cima Road, then 0.4 miles west to the gate at the Kingston Range Wilderness. Location of my collections 1569 to 1574. 18 Apr 2017. (COLO02348811^‡, CS, EIU, UC2080700^‡).

Ratibida columnifera (Nutt.) Woot. & Standl.  (Syn: Rudbeckia columnifera Nutt. ) Upright Prairie Coneflower.
1198, Colorado School of Mines Survey Field. Northern portion of the Survey Field, near the road to city water tank from Lookout Mountain Road, 1.95 km south southeast of the GNIS location of Golden Highest plains at the base of Lookout Mountain. 12 Jul 2015. (KHD56979^‡, OBI83170^‡, UC, UCR267678^‡).
1496, North Table Mountain Park. Top of North Table Mountain, base of north-facing rocky slope (fault scarp?) above pond, 3.3 km. north northeast of the GNIS location of Golden. 13 Jul 2016. (COLO2299725^‡, CS, EIU028190^‡, JCOS s.n., KHD00063466^‡).
1514, Ranson/Edwards Homestead Open Space Park. Northern part of open space, 1.6 mi. west on CO Highway 72 from CO Highway 93, north 1.9 mi. on Plainview Road, then 300 m. northeast, almost to the boundary fence; 16.3 km. north northwest of the GNIS location of Golden. Hillside on highest prairie just below ponderosa pine woodland. 24 Jul 2016. (EIU028460^‡, JCOS s.n., KHD00063459^‡, OBI83334^‡, UC).
1702, North Washington Open Space. 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. Southeast corner of parcel, between social trails. 14 Jul 2017. (CAS, CDA0052322^‡, KHD00065461^‡).
1966, 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. 6 Jul 2018. (COLO02348597^‡, KHD00068677^‡, OBI, UC).

Rudbeckia hirta L. var. pulcherrima Farw.  Black-Eyed Susan.
2635, Morrison Creek. Along Morrison Creek and former National Forest Road 547, 2.78 km. south of National Forest Road 550, 63.4 km. south of the GNIS location of Golden. Shaded area, in a generally more open forest, with an adjacent meadow. Also collected here: Galium boreale, and Thalictrum fendleri. 5 Aug 2021. (CAS, UCR, KHD00075398^‡, OBI183680^‡).

Rudbeckia laciniata L. var. ampla (A. Nelson) Cronquist.  Cut-Leaf Coneflower..
2650, Morrison Creek. Buffalo Creek Recreation Area, along Morrison Creek and former National Forest Road 547, 0.88 km. south of National Forest Road 550, 61.5 km. south of the GNIS location of Golden. In shade on banks of creek; also collected nearby: Thalictrum fendleri, Lupinus argenteus, Antennaria rosea, and Arnica cordifolia. 5 Aug 2021. (CS, KHD00075219^‡, OBI183732^‡).

Sanvitalia abertii A. Gray.  Abert's Sanvitalia.
145, Lobo Point. Alluvial plains, flat areas, 1˝ miles west northwest of Hole-in-the-Wall, 9 miles north northeast of Mitchell Caverns. . (Golden).
201, Pinto Mountain. 289 km northeast of Los Angeles, California. South slope of the mountain. 26 September 1999. (UC(TAS), Zzyzx s.n.).

Scorzonera laciniata L.  (Syn: Podospermum laciniatum (L.) De Candolle ) Cutleaf Vipergrass.
1399, North Table Mountain. Southwest side of North Table Mountain, along City of Golden North Table Mountain Trail, 2.2 km. north of the GNIS location of Golden. Disturbed trailside with grasses and Tragopogon dubius. 8 Jun 2016. (JCOS s.n., KHD00063987^‡).
1623, North Washington Open Space. 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. Western section of parcel, which has possibly been revegetated after adjacent home construction. 15 May 2017. (CDA0050094^‡, KHD00065498^‡).
2164, Lippincott Ranch. Northernmost Jefferson County, jointly owned by City of Boulder OSMP and Jefferson County Open Space, approximate centroid of parcel, in the junction of the ranch road and quarry road, 22.0 km. north northwest of the GNIS location of Golden. Trampled by vehicles and eaten by cows. Also collected in this junction: Capsella bursa-pastoris, Collinsia parviflora, and Draba nemorosa, with Taraxacum officinale nearby. 21 Jul 2019. (CIBO, JCOS s.n., KHD00070789^‡, OBI ^‡).
2299, Apex Park - Northern Parcel. Northernmost quadrant of the parcel, steep slope part way up the initial Front Range scarp, shaded spot between junipers, beside a small trickle of water from a spring, 4.03 km. south of the GNIS location of Golden Also seen or collected nearby: Juniperus scopulorum, Eriogonum alatum, Turritis glabra, Physalis hederifolia, and Erigeron tracyi. 26 May 2020. (JCOS s.n., UCR).

Senecio L.  Ragwort.
3332, Brumley. sloped bank away from creek 23 Jul 2024. (Undist.).

Senecio hydrophilus Nutt.  Alkali-Marsh Butterweed.
907, Rush Creek delta. On the edge of a fresh-water lagoon, southeast side of the Rush Creek delta, very near the alkaline water of Mono Lake. 26 Aug 2012. (CAS1157552^‡, UC).

Senecio integerrimus Nutt.  Columbia Ragwort.
972, Bridgeport Canyon. Along Coyote Springs Road, about 1/3 mile southeast of the pass, at a watercourse crossing the road from southwest to northeast, 6˝ miles by road north of California Highway 167. Variety exaltatus (Nutt.) Cronquist if infraspecific names are to be applied. 22 May 2013. (CAS1160955^‡, UC).
1108, Tin Cup Ridge. In shrubby vegetation along the top of Tin Cup Ridge, the northward extension of Dakota Ridge into Golden, 4.58 km south southeast of the GNIS location of Golden. East across US Highway 40 from the Peabody Museum dig at Magic Mountain, which was collected by E. H. Brunquist (1959). 14 May 2015. (CAS, KHD56932^‡, OBI82130^‡, UC, UCR266078^‡).
1476, Evans Gulch. Mid-section of Evans Gulch, near Conley Lakes and the Diamond Mine, 4.6 mi. by road east of the GNIS location of Leadville. Southeast-facing open slope with mostly forbs. Var. exaltatus (Nutt.) Cronquist if infraspecific taxa are to be recognized. 29 Jun 2016. (CAS, EIU, OBI83351^‡, UC).
1637, Colorado School of Mines Survey Field. Southwestern part of Survey Field, lowest slopes of Lookout Mountain (Rocky Mountain Front Range), 2.56 km. south southwest of the GNIS location of Golden. North-facing slope, above a small stream. 25 May 2017. (CDA0050035^‡, CS, EIU, KHD00065493^‡).
1811, North Table Mountain Park. Lowest north slopes of North Table Mountain, on a small flat that appears to be a landslide run-out, 4.8 km. north northeast of the GNIS location of Golden. Numerous plants among short grasses and forbs. Variety exaltatus (Nutt.) Cronquist if infraspecific names are to be applied. 10 May 2018. (CDA0052345^‡, JCOS s.n., KHD00068673^‡, UC).
1831, Ranson/Edwards Homestead Open Space Park. 1.7 miles west on CO Highway 72 from CO Highway 93, then 1.4 miles generally north on Plainview Road, then about 300 m. northeast to the general vicinity of the old homestead, about 15.8 km. north of the GNIS location of Golden. Moderate north slope, deep grass with Astragalus agrestis. 17 May 2018. (COLO02347607^‡, JCOS s.n., KHD00068674^‡, UCR ^‡).
1847, North Washington Open Space. 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. Just a few plants on the eastern slope, in dense smooth brome. 18 May 2018. (KHD00068675^‡).
1858, Tin Cup Ridge. Lower east slopes of Tin Cup Ridge, the northward extension of Dinosaur Ridge into Golden, 4.77 km. south southeast of the GNIS location of Golden. Open grassland. 23 May 2018. (CS, EIU, JCOS s.n., KHD00068676^‡, OBI149559^‡, UCR ^‡).
1897, Colorado School of Mines Survey Field. Base of the Rocky Mountain Front Range, northeast-facing slope, above an unnamed stream in the south end of the Survey Field, 2.51 km. south of the GNIS location of Golden. Growing in deep grasses and forbs at the base of tall shrubs. 28 May 2018. (COLO02347573^‡, CS).
2029, Lippincott Ranch. Jointly owned by City of Boulder OSMP and Jefferson County Open Space, near the northern edge of the property and the Boulder County boundary, east side of ridge, 25.6 km. north northwest of the GNIS location of Golden. Deep forest litter in cracks of ridge bedrock. 26 May 2019. (CIBO, JCOS s.n., KHD00071107^‡).
2059, Lippincott Ranch. Northernmost Jefferson County, parcel jointly owned by City of Boulder and Jefferson County Open Space, approximate centroid of parcel, 22 km. north northwest of the GNIS location of Golden. Ponderosa pine woodland where the highest Great Plains meets the Rocky Mountain Front Range, parcel disturbed by cattle grazing and clay mining. 6 Jun 2019. (CIBO, COLO2434652^‡, CS, JCOS s.n., KHD00072494^‡, REGIS).
2281, Apex Park - Northern Parcel. Along the eastern edge of the Apex Park - North parcel, in a little bowl, 4.70 km. south of the GNIS location of Golden. Mixed grass and foothill shrubland, around the edge of a thicket of Prunus americana and Rhus trilobata. Cynoglossum officinale also here. 18 May 2020. (CDA0053735^‡, JCOS s.n., KHD00073454^‡, REGIS).
2941, Guy Gulch. Douglas Mountain Study Area, area along Guy Gulch, about 80 m. above the road, north side of Jefferson County Road 70 and near western boundary, 17.7 km. northwest of the GNIS location of Golden. Nose of small southeast plunging ridge, with Juniperus scopulorum, Pediocactus simpsonii, Mertensia lanceolata, and Cercocarpus montanus. 6 Jun 2023. (COLO, OBI, UCR, JCOS).
3001, Guy Gulch. North of Guy Gulch, accessed by a ranch road off of Pyrenees Lane, in a flat area 143 m. southwest of the line shack, 1.24 km. west southwest of Mt. Tom, 13.8 km. (geodesic) northwest of the GNIS location of Golden. Open ground amid lodgepole pines. 23 Jun 2023. (CAS, CS, EIU, CDA).

Senecio pudicus Greene.  Bashful Ragwort.
3176, Guy Gulch. Southwest side of the gulch, 690 m. northwest of Centennial Ranch, 12.9 km. northwest of the GNIS location of Golden. Steep slope above creek, twining through Symphoricarpos sp., with Erigeron speciosus. 31 Jul 2023. (CS, OBI, KHD00080572^‡, JCOS).

Senecio spartioides Torr. & A. Gray.  (Syn: S. multicapitatus Greenm. ex Rydb. ) Broomlike Ragwort.
1298, Tin Cup Ridge. Among rocks along the top of Tin Cup Ridge, the northern extension of Dakota Ridge into Golden, 4.7 km south southeast of the GNIS location of Golden. 23 Sep 2015. (JCOS s.n., KHD56980^‡, UC, UCR267491^‡).
1538, North Table Mountain Park. lower north slopes of North Table Mountain, 0.73 km. south southeast of the Mesa Spur trailhead on W. 58th Avenue, 4.5 km. north northeast of the GNIS location of Golden. Mixed grasses, forbs and small shrubs. 18 Aug 2016. (JCOS s.n., KHD00063457^‡).
1545, North Table Mountain Park. Middle elevation south slopes of North Table Mountain, along Golden Cliffs trail, 84 m. northeast of the Golden Cliffs trailhead, 1.4 km. northeast of the GNIS location of Golden. Growing next to Coll. No. 1319, Ribes aureum, 4 May 2016. 1 Sep 2016. (CS, EIU, JCOS s.n., KHD00063967^‡, OBI83344^‡).
1564, Ranson/Edwards Homestead Open Space Park. Northwest corner of the Ranson/Edwards parcel, 1.7 mi. west on CO Highway 72 Coal Creek Canyon Road from CO Highway 93, 2.3 mi. north on Plainview Road, then 40 m. west, 16.3 km. north northwest of the GNIS location of Golden. Not often seen at Ranson/Edwards; these growing among grasses and fallen, burned ponderosa pines. 8 Sep 2016. (COLO02348431^‡, JCOS s.n., KHD00063994^‡, UC).
1755, North Washington Open Space. 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. Near top of hill, in some of the least-disturbed native vegetation. 31 Aug 2017. (CAS, CDA0052331^‡, KHD00065160^‡).
2209, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 1.6 mi. west on CO Hwy 72 from CO Hwy 93, 1.1 mi. north on Plainview Road, then 925 m. west on a small ridge, 19.9 km. north northwest of the GNIS location of Golden. 27 Aug 2019. (OBI186025^‡, REGIS).
2216, Lippincott Ranch. Northernmost Jefferson County, parcel jointly owned by Jefferson County Open Space and City of Boulder OSMP, among boulders on the south side of Bull Gulch, 22.9 km. north northwest of the GNIS location of Golden. Also collected here: Grindelia squarrosa, Heterotheca foliosa, Pericome caudata, Nepeta cataria, and Urtica dioica. 29 Aug 2019. (CAS, CIBO, JCOS s.n., KHD00074447^‡, UCR).
2231, North Washington Open Space. 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. Remnant mixed-grass prairie, also collected nearby: Hymenopappus filifolius, Oxytropis lambertii, Eriogonum effusum and Carex inops var. heliophila. 12 Sep 2019. (COLO2433589^‡, CS, EIU, REGIS).
2237, Little Scraggy Peak. Buffalo Creek Recreation Area, northeast slopes of Little Scraggy Peak, 1.70 km. southwest of the Little Scraggy trailhead, 60.1 km. south of the GNIS location of Golden. Also collected nearby: Jamesia americana, Solidago nana, and Arctostaphylos uva-ursi. Area generally disturbed by minerals prospecting, fuels reduction, and mountain biking recreation. 16 Sep 2019. (CDA0052318^‡, KHD00071094^‡, OBI149558^‡, UCR).

Senecio triangularis Hook.  Arrowleaf Ragwort.
874, Parker Creek. Along Parker Creek Road (F. R. 01S25), where it crosses a small unnamed creek, 3.2 miles southwest of the intersection of California Highway 158 and US Highway 395. Very sticky when collected, dried leaves are very thin, and have a glandular exudate on adaxial surface. 23 Jun 2012. (CAS1157547^‡, UC).
2003, North Fork West Tennessee Creek. Tennesee Creek Basin, 8.2 mi. north of Leadville, then 2.4 mi. generally west on County Road 9 and Forest Road 131, not quite to Lily Lake, 12.5 km. north northeast of the GNIS location of Leadville. Mixed pine forest and abandoned beaver dams. 25 Jul 2018. (OBI148139^‡, UCR ^‡).
2707, North Fork West Tennessee Creek. About 250 m. northeast of Lily Lake, near the current end of Pike-San Isabel Forest Road 131, 2.6 road miles west of US Highway 24, 140 km. southwest of the GNIS location of Golden. Subalpine forest beside the creek, deep shade. 17 Aug 2021. (CAS, CDA, COLO2706067^‡, KHD00075282^‡).
3109, West Tennessee Creek. Meadow in a small valley between West Tennessee Creek and Lily Lake, 400 m. southwest of Lily Lake, 12.8 km. northwest of the GNIS location of Leadville. With Veratrum californicum, Pedicularis racemosa, and Viola sp. 18 Jul 2023. (CS, EIU, REGIS, UC).

Solidago gigantea Aiton.  Giant Goldenrod.
2227, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, northwest corner of Ranson/Edwards, 1.7 mi. west on CO Hwy 72 from CO Hwy 93, 2.1 mi generally north on Plainview Road, then 200 m. west. In deep grassland with few ponderosa pines, also collected nearby: Antennaria rosea, Townsendia hookeri, Noccaea fendleri, and Frasera speciosa, 10 Sep 2019. (JCOS s.n., KHD00074456^‡).
2422, Deadman Gulch. 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. Inflorescence full of little crab spiders colored the same yellow as the corollas. 17 Aug 2020. (COLO2434025^‡, KHD00073443^‡, OBI186036^‡, UCR).
2736, Apex Park - Northern Parcel. In an unnamed gulch, the largest of several that join to flow through the Stonebridge HOA, part way up the initial scarp of the Front Range, 4.61 km. south of the GNIS location of Golden. On floor of gulch, just at the lower extent of ponderosa pine woodland. Also here: Quercus gambelii, Malus pumila, and Heliomeris multiflora. 1 Sep 2021. (CS, JCOS).

Solidago missouriensis Nutt.  Missouri Goldenrod.
1255, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 15.2 km north northeast of Golden, 1.3 miles north of CO State Highway 72 on Plainview Road, 212 m. west of Plainview Road. 26 Jul 2015. (JCOS s.n., KHD56978^‡).
1256, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 15.2 km north northeast of Golden, 1.3 miles north of CO State Highway 72 on Plainview Road, 240 m. west of Plainview Road. Same as Coll. No. 1255, but of shorter stature, perhaps because of distance from intermittent stream. 26 Jul 2015. (CAS, UC, UCR267468^‡).
1519, North Table Mountain Park. Lower east slopes of North Table Mountain, along the North Table Loop north of the Mesa Top Trail, 1.2 km. northwest of the Easley Road trailhead; 4.32 km. northeast of the GNIS location of Golden. Trailside in small outcrop of rocks. 29 Jul 2016. (COLO02347953^‡, EIU028180^‡, JCOS s.n., KHD00063458^‡, OBI83316^‡).
1732, North Table Mountain Park. Westernmost slope of North Table Mountain, near North Table Loop, just north of parking lot and trailhead, 3.2 km. north of the GNIS location of Golden. With Bromus inermis, Andropogon gerardii, Liatris punctata in bud, Linum lewisii in seed. 15 Aug 2017. (CDA0052327^‡, JCOS s.n., KHD00065323^‡).
1752, North Washington Open Space. 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. Eastern half of parcel, east slope at edge of smooth brome infestation. 31 Aug 2017. (CS, KHD00065157^‡).
1969, 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. 6 Jul 2018. (COLO02348555^‡, KHD00068671^‡, OBI).
2196, North Washington Open Space. 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. 11 Aug 2019. (CAS, REGIS, UC, UCR).
2643, Morrison Creek. Buffalo Creek Recreation Area, along Morrison Creek and former National Forest Road 547, 2.55 km. south of National Forest Road 550, 63.2 km. south of the GNIS location of Golden. “Meadow” with many down trees; also collected here: Betula occidentalis. 5 Aug 2021. (CS, DEMO, EIU, CDA).
2649, Morrison Creek. Buffalo Creek Recreation Area, along Morrison Creek and former National Forest Road 547, 1.42 km. south of National Forest Road 550, 62.1 km. south of the GNIS location of Golden. Open Douglas fir forest, east-facing slope above the creek. 5 Aug 2021. (CS, COLO2706265^‡, KHD00075624^‡, OBI183729^‡).
2692, Salt Creek. South-facing hillside along Salt Creek and Pike-San Isabel National Forest Road 435 "Salt Creek Road," 3.2 mi. by road west of US Highway 285, 145 km. southwest of the GNIS location of Golden. Open hillside with ponderosa pines, collected nearby: Chaenactis douglasii, Erigeron subtrinervis, Gutierrezia sarothrae, and Hymenoxys richardsonii var. floribunda. 16 Aug 2021. (CAS, EIU, UC, UCR).
2701, North Fork West Tennessee Creek. About 125 m. northeast of Lily Lake, at the current end of Pike-San Isabel Forest Road 131, 2.6 road miles west of US Highway 24, 140 km. southwest of the GNIS location of Golden. Open shade next to a wetland formed by the creek. 17 Aug 2021. (CAS, CDA, UCR, OBI183394^‡).
3164, Guy Gulch. North of Guy Gulch, accessed by a ranch road off of Pyrenees Lane, 72 m. north of the line shack, 1.07 km. west southwest of Mt. Tom, 13.8 km. (geodesic) northwest of the GNIS location of Golden. Sunny openings in grass. 26 Jul 2023. (COLO, CS, EIU, REGIS, JCOS).
3375, Dispersed Camp Site. 12 Sep 2024. (Undist.).

Solidago mollis Bartl.  Velvety Goldenrod.
3363, Ranson/Edwards Homestead Open Space Park. near fence Symphyotrichum ericoides, Rosa arkansana, Phleum pratense 23 Aug 2024. (Undist.).

Solidago multiradiata Aiton.  Rocky Mountain Goldenrod.
1992, Brumley. On a terrace beside the North Fork of Lake Creek, between Twin Lakes and Independence Pass, about 11 mi. generally west on Colorado Highway 82 from the town of Twin Lakes. Variety scopulorum A. Gray in Ackerfield (2015), but infraspecific names not recognized by FNANM. Brumley was a stage stop on the route across Independence Pass. 24 Jul 2018. (KHD00068670^‡, OBI158904^‡, UCR ^‡).
2009, North Fork West Tennessee Creek. Tennesee Creek Basin, 8.2 mi. north of Leadville, then 2.4 mi. generally west on County Road 9 and Forest Road 131, not quite to Lily Lake, 12.5 km. north northeast of the GNIS location of Leadville. Mixed pine forest and abandoned beaver dams. 25 Jul 2018. (KHD00068672^‡, OBI170962^‡, UC, UCR ^‡).
2589, North Fork West Tennessee Creek. About 300 m. east of Lily Lake, along Pike-San Isabel Forest Road 131, 2.6 road miles west of US Highway 24, 140 km. southwest of the GNIS location of Golden. Dry rocky opening in lodgepole pine forest. Variety scopulorum per Ackerfield (2015) though infraspecific names are not widely recognized. 13 Jul 2021. (CAS, UC, COLO2706125^‡, CDA).
2719, Brumley. Subalpine forest on a bank between the access road to the Sno-Tel station and the highway, about 11 road miles generally west on Colorado Highway 82 from the town of Twin Lakes, 175 km. southwest of Golden. One of three “goldenrods” growing together, the others are Oreochrysum parry and Solidago simplex. Brumley was a stage stop on the route across Independence Pass. 18 Aug 2021. (CS, UC, COLO2706315^‡).

Solidago nana Nutt.  Baby Goldenrod.
1292, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 16.25 km north northwest of Golden, 1.8 miles north of CO State Highway 72 on Plainview Road, then 175 m. west southwest of Plainview Road. Few plants, or maybe one plant, few flowering stems, northwest side of ponderosa pine. 9 Sep 2015. (JCOS s.n., KHD56981^‡).
1759, North Washington Open Space. 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. On a bank that was formerly cut, unknown whether it was intentionally regevetated or not. 31 Aug 2017. (KHD00065164^‡, UCR ^‡).
2205, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 1.6 mi. west on CO Hwy 72 from CO Hwy 93, 1.1 mi. north on Plainview Road, then 480 m. on a small ridge, 19.4 km. north northwest of the GNIS location of Golden. Also observed/collected nearby: Toxicodendron rydbergii and Artemisia campestris. 27 Aug 2019. (CAS, JCOS s.n., KHD00074285^‡, OBI186027^‡).
2235, Little Scraggy Peak. Buffalo Creek Recreation Area, northeast slopes of Little Scraggy Peak, 1.47 km. southwest of the Little Scraggy trailhead, 60 km. south of the GNIS location of Golden. Area generally disturbed by minerals prospecting, fuels reduction, and mountain biking recreation. 16 Sep 2019. (Golden).
2439, Eagle Ridge. 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. Ponderosa pines and foothills shrubland, mostly Cercocarpus montanus. 28 Aug 2020. (COLO2434090^‡, KHD00073462^‡, OBI183253^‡, UC).

Solidago nemoralis Aiton ssp. decemflora (de Candolle) Brammall ex Semple.  Gray Goldenrod.
2432, Apex Park - Northern Parcel. Northeast quadrant of Apex Park - North Parcel, base of the Rocky Mountains foothills scarp, 4.46 km. south of the GNIS location of Golden. Also collected nearby: Eriogonum effusum, Artemisia dracunculus, Ericameria nauseosa var. graveolens, Senecio spartioides, and Xanthisma spinulosum; the grasses having long since senesced. Compare to Coll. No. 2433, collected 140 m. southwest. 19 Aug 2020. (COLO2434066^‡, JCOS s.n., KHD00073466^‡, OBI186056^‡).
2433, Apex Park - Northern Parcel. Northeast quadrant of Apex Park - North Parcel, base of the Rocky Mountains foothills scarp, 4.56 km. south of the GNIS location of Golden. Mixed foothills grass- and shrub-land, the grasses having long since senesced in this long, hot, dry summer. Compare to Coll. No. 2432, made 140 m. to the northeast. 19 Aug 2020. (COLO2434058^‡, JCOS s.n., KHD ^‡, OBI186057^‡).
3222, Colorado School of Mines Survey Field. Northwest corner of Survey Field, north-facing slope of small gulch, 1.97 km. southwest of the GNIS location of Golden. Highest Great Plains at base of Rocky Mountain Front Range scarp, with Juniperus scopulorum and Pinus ponderosa. 17 Sep 2023. (CS, EIU, REGIS, UCR).

Solidago rigida L. var. humilis Porter.  Stiff Goldenrod.
1280, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 15.2 km north northeast of Golden, 1.3 miles north of CO State Highway 72 on Plainview Road, 435 m. west of Plainview Road. Small terrace near an intermittent stream. 28 Aug 2015. (CAS, JCOS s.n., JCOS s.n., KHD56982^‡, UC, UCR267479^‡).
1556, Ranson/Edwards Homestead Open Space Park. 1.7 mi. west on CO Highway 72 Coal Creek Canyon Road, from CO Highway 93, 1.2 mi. north on Plainview Road, then 400 m. east of Plainview road, 15.3 km. north northwest of the GNIS location of Golden. Wet, almost swampy, area on the south side of an intermittent stream. 3 Sep 2016. (CS, OBI83373^‡).
1769, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 1.7 mi. west on Colorado Highway 72 from Colorado Highway 93, 1.6 mi. north on Plainview Road, then 270 meters southwest on the slope above the road. 1 Sep 2017. (CDA0052334^‡, COLO02348118^‡, EIU029808^‡).
2198, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 19.4 km. north northwest of the GNIS location of Golden, 1.6 mi. west on CO Hwy 72 from CO Hwy 93, 0.9 mi. north on Plainview Road, then 130 m. west into open prairie. Low, wet area. Also collected here: Helianthus pauciflorus ssp. subrhomboideus, nearby: Lactuca serriola, Sonchus asper, and Sporobolus heterolepis. 27 Aug 2019. (JCOS s.n., KHD00070563^‡, OBI183229^‡, REGIS, REGIS, UCR).

Solidago simplex Kunth.  Sticky Goldenrod.
2718, Brumley. Subalpine forest on a bank between the access road to the Sno-Tel station and the highway, about 11 road miles generally west on Colorado Highway 82 from the town of Twin Lakes, 175 km. southwest of Golden. One of three “goldenrods” growing together, the others are Oreochrysum parry and Solidago multiradiata. Brumley was a stage stop on the route across Independence Pass. 18 Aug 2021. (Golden).

Solidago speciosa Nutt. var. pallida Porter.  Pale Showy Goldenrod.
1768, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 1.7 mi. west on Colorado Highway 72 from Colorado Highway 93, 1.6 mi. north on Plainview Road, then 260 meters southwest on the slope above the road. 1 Sep 2017. (JCOS s.n., KHD00065170^‡).

Solidago spectabilis (D. C. Eaton) A. Gray.  Basin Goldenrod.
495, Old Marina. Along the western shore of Mono Lake, 1.6 mi (2.6 km) north of Lee Vining. 1 Aug 2007. (CAS1121728^‡, UC1973763^‡).
1022, Walker Creek (Lower). In Pumice Valley, near the banks of lower Walker Creek, where crossed by an old alignment of US Highway 395, 4.5 miles by road south of Lee Vining. 24 Jul 2013. (UCR262295^‡).

Solidago velutina DC. ssp. sparsiflora (A. Gray) Semple.  Three-Nerve Goldenrod.
2659, Bull Gulch. Lippincott Ranch, crossed west to east by Bull Gulch, 130 m. west from the eastern boundary, north bank, approx. opposite the giant boulder, 1.36 km. north northwest of the main gate, and 23.0 km. north northwest of the GNIS location of Golden. Lippincott Ranch is jointly owned by City of Boulder Open Space and Mountain Parks and Jefferson County Open Space. 7 Aug 2021. (CIBO, JCOS, KHD00075628^‡, OBI183409^‡).
2735, Apex Park - Northern Parcel. Base of the Front Range scarp, in a flat area between two drainages, northeast corner of Apex Park, above an unnamed drainage through the Stonebridge HOA, 4.58 km. south of the GNIS location of Golden. 1 Sep 2021. (CS, COLO2706299^‡, JCOS, KHD00075263^‡).

Sonchus asper (L.) Hill.  Spiny Sowthistle.
2201, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 19.4 km. north northwest of the GNIS location of Golden, 1.6 mi. west on CO Hwy 72 from CO Hwy 93, 0.9 mi. north on Plainview Road, then 150 m. west into open prairie. 27 Aug 2019. (KHD00070529^‡).
2414, Kinney Run. Steep bank of Kinney Run, just north of Tripp Ranch, 2.61 km. south of the GNIS location Golden. Moist soil. 31 Jul 2020. (COLO2433944^‡, KHD00079305^‡).

Sphaeromeria potentilloides (A. Gray) A. Heller var. nitrophila (Cronq.) Holmgren, Schultz & Low.  Alkali Tansy-Sage.
623.1, Alkali Lake. Northwest margin of Alkali Lake, in silty alkali flat with rabbitbrush. 29 Jun 2010. (UC1980378^‡).

Stenotus acaulis (Nutt.) Nutt.  Cushion Goldenweed.
971, Bridgeport Canyon. Along Coyote Springs Road, about 1/3 mile southeast of the pass, at a watercourse crossing the road from southwest to northeast, 6˝ miles by road north of California Highway 167. 22 May 2013. (CAS1160956^‡, UC, UCR250007^‡).

Stephanomeria exigua Nutt. ssp. exigua.  Small Wirelettuce.
496, Bohler Canyon. Along the dirt road on the south side of Bohler Canyon, 1.8 mi (3.0 km) by air west of US Highway 395. Growing in sand and gravel with Artemisia tridentata. 02 Aug 2007. (CAS1121727^‡, UC1973764^‡).
704, Sagehen Meadow. North side of meadow, near house. 17 Aug 2010. (CAS1131415^‡, UC1980385^‡).

Stephanomeria pauciflora (Torr.) A. Nelson.  Brownplume Wirelettuce.
1518, North Table Mountain Park. Lower east slopes of North Table Mountain, between North Table Loop and Mesa Top Trail, 0.7 km. northwest of the Easley Road trailhead; 3.9 km. northeast of the GNIS location of Golden. Grassy southeast-facing slope. 29 Jul 2016. (COLO02347961^‡, KHD00065717^‡, OBI176126^‡).

Symphyotrichum campestre (Nutt.) G. L. Nesom.  (Syn: Aster campestris Nutt. ) Western Meadow Aster.
830, Tioga Lodge. Granite outcrop surrounded by very sandy soil, likely a former shoreline or deltaic deposit from a high-stand of Mono Lake, above Tioga Lodge, along a powerline road, 2.8 miles north of Lee Vining. 18 Jun 2012. (CAS1130740^‡, CDA39620^‡, UC2015314^‡).

Symphyotrichum ericoides (Linnaeus) G. L. Nesom.  (Syn: Virgulus ericoides (Linnaeus) Reveal & Keener ) White Heath Aster.
1558, Ranson/Edwards Homestead Open Space Park. 1.1 miles north on Plainview Road from CO State Highway 72, then 400 m. east, to a damp area where an old ranch road first crosses an ephemeral stream. 3 Sep 2016. (JCOS s.n., KHD00063996^‡, OBI83372^‡).
1743.5, Golden. Edge of the yard on Cheyenne Street at 908 4th Street, 1 km northwest of the GNIS location of Golden. Native to the area, but ruderal in this location, as sometimes also observed with Ericameria nauseosa var. graveolens and Senecio spartioides. 23 Aug 2017. (CDA).
1771, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 1.7 mi. west on Colorado Highway 72 from Colorado Highway 93, 1.6 mi. north on Plainview Road, then 210 meters southwest on the slope above the road and near a small group of Ponderosa pines. 1 Sep 2017. (JCOS s.n., KHD00065402^‡).
2750, Lippincott Ranch. Southwestern portion of the ranch, on the northwest bank of an unnamed drainage that is tributary to Bull Gulch, 1.11 km. northwest of the main gate, 22.7 km. north northwest of the GNIS location of Golden. Coordinates estimated from Coll. No. 2749. Lippincott Ranch is jointly owned by City of Boulder Open Space and Mountain Parks and Jefferson County Open Space. 7 Sep 2021. (CIBO, CDA54535^‡, JCOSs.n., UCR297676^‡).
3198, Colorado School of Mines Survey Field. Bank of unnamed creek, near southern boundary of the southeast quadrant of Survey Field, 2.49 km. (geodesic) south of the GNIS location of Golden. 27 Aug 2023. (CS, EIU, REGIS, COLO).

Symphyotrichum falcatum (Lindl.) G.L. Nesom.  (Syn: Aster falcatus Lindl. ) White Prairie Aster.
1300, Tin Cup Ridge. Lower northeast slopes of Tin Cup Ridge, the northern extension of Dakota Ridge into Golden, 4.5 km south southeast of the GNIS location of Golden. 23 Sep 2015. (CAS, JCOS s.n., KHD56983^‡, UC, UCR267493^‡).
1712, North Washington Open Space. 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. See also my Coll. No. 1760. 14 Jul 2017. (REGIS).
1760, North Washington Open Space. 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. South-central portion of parcel, but still above the most disturbed areas. 31 Aug 2017. (EIU029816^‡, KHD00065165^‡, OBI).

Symphyotrichum foliaceum (DC.) G. L. Nesom var. apricum (A. Gray) G. L. Nesom.  Parry's Aster.
3138, Evans Gulch. Middle section of Evans Gulch, near Conley Lakes and the Diamond Mine, 4.6 mi. by road east of the GNIS location of Leadville. Sunny open southeast-facing slope. 20 Jul 2023. (OBI, KHD00080563^‡).

Symphyotrichum foliaceum (DC.) G. L. Nesom var. parryi (D. C. Eaton) G. L. Nesom.  Parry's Aster.
2728, Brumley. Sandy abandoned oxbow of the North Fork of Lake Creek, about 145 m. north of the Sno-Tel station road turnoff from the highway, about 11 road miles generally west on Colorado Highway 82 from the town of Twin Lakes, 175 km. southwest of Golden. Somewhat older and more vegetated portion of the sandy bar. Brumley was a stage stop on the route across Independence Pass. 18 Aug 2021. (KHD00075262^‡, OBI183785^‡).

Symphyotrichum frondosum (Nutt.) G. L. Nesom.  (Syn: Aster frondosus (Nutt.) Torr. & A. Gray ) Short-Rayed Alkali Aster.
904, Rush Creek delta. On low-lying very wet strands in the Rush Creek delta. 26 Aug 2012. (CAS1157553^‡, UC, UCR248637^‡).

Symphyotrichum laeve (L.) Á. Löve & D. Löve.  Smooth Blue Aster.
1278, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 16.7 km north northeast of Golden, 2.4 miles north of CO State Highway 72 on Plainview Road, then 250 m. northwest of Plainview Road on a social trail. 20 Aug 2015. (CAS, JCOS s.n., KHD00062149^‡, UC, UCR267476^‡).
1291, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 16.25 km north northwest of Golden, 1.8 miles north of CO State Highway 72 on Plainview Road, then 175 m. west of Plainview Road. Northeast slope, with Gentiana, Monardella, and a mat-forming Asteraceae. Ambiguous as to variety name, as also noted on Coll. No. 1278. 9 Sep 2015. (CAS, JCOS s.n., KHD56984^‡, OBI83235^‡, UC, UCR267487^‡).
2222, Lippincott Ranch. Northernmost Jefferson County, parcel jointly owned by Jefferson County Open Space and City of Boulder OSMP, north segment of parcel, south side of Bull Gulch, 22.8 km. north northwest of the GNIS location of Golden. Highest prairie at edge of ponderosa pine woodland. Heavily grazed by cattle. Also collected here: Hypericum perforatum, a Colorado Noxious Weed List C plant. 29 Aug 2019. (CIBO, COLO2433472^‡, JCOS s.n., KHD00074461^‡, REGIS).

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.
2441, Deadman Gulch. 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. Riparian, also seen or collected nearby: Clematis ligusticifolia, Mirabilis nyctaginea, Crataegus succulenta, and Epilobium hirsutum. 28 Aug 2020. (COLO2434108^‡, KHD00073469^‡, OBI186038^‡).

Symphyotrichum porteri (A. Gray) G.L. Nesom.  (Syn: Aster porteri A. Gray ) Smooth White Aster.
1266, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 15.8 km north northeast of Golden, 1.4 miles north of CO State Highway 72 on Plainview Road, 163 m. northeast of Plainview Road. 29 Jul 2015. (JCOS s.n., KHD00062150^‡, UC).
1279, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 16.7 km north northeast of Golden, 2.4 miles north of CO State Highway 72 on Plainview Road, then 250 m. northwest of Plainview Road on a social trail. Sparse ponderosa pine forest. 20 Aug 2015. (CAS, JCOS s.n., KHD00062152^‡, OBI83213^‡, UCR267477^‡).
1290, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 16.25 km north northwest of Golden, 1.8 miles north of CO State Highway 72 on Plainview Road, then 125 m. west of Plainview Road. Shade of ponderosa pine. 9 Sep 2015. (CAS, JCOS s.n., KHD00062154^‡, OBI83233^‡).
1297, Tin Cup Ridge. Openings along the rocky top of Tin Cup Ridge, the northern extension of Dakota Ridge into Golden, 5.1 km south southeast of the GNIS location of Golden. West-facing grassy slope. 23 Sep 2015. (CAS, JCOS s.n., KHD00062156^‡, UC, UCR267490^‡).
1770, Ranson/Edwards Homestead Open Space Park. High plains above Rocky Flats, 1.7 mi. west on Colorado Highway 72 from Colorado Highway 93, 1.6 mi. north on Plainview Road, then 210 meters southwest on the slope above the road and near a small group of Ponderosa pines. Growing with Coll. No. 1771, Symphyotrichum ericoides. 1 Sep 2017. (CDA0052335^‡, EIU029809^‡).
2219, Lippincott Ranch. Northernmost Jefferson County, parcel jointly owned by Jefferson County Open Space and City of Boulder OSMP, among boulders on the south side of Bull Gulch, 22.9 km. north northwest of the GNIS location of Golden. Also collected here: Grindelia squarrosa, Heterotheca foliosa, Pericome caudata, Senecio spartioides, and Nepeta cataria. 29 Aug 2019. (CIBO, COLO2433522^‡, JCOS s.n., KHD00074465^‡, REGIS).
2230, North Washington Open Space. 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. Also collected nearby: Cryptantha virgata, Lithospermum incisum, Penstemon secundiflorus, and Poa secunda. 12 Sep 2019. (CDA0052316^‡, COLO2433597^‡, CS, KHD00074457^‡).
2648, Morrison Creek. Buffalo Creek Recreation Area, along Morrison Creek and former National Forest Road 547, 1.90 km. south of National Forest Road 550, 62.5 km. south of the GNIS location of Golden. Southwest facing slope above Morrison Creek, in bed of old road, Douglas fir forest. 5 Aug 2021. (CS, EIU).
2734, Apex Park - Northern Parcel. Base of the Front Range scarp, on a low ridge in the northeast corner of Apex Park, above an unnamed drainage through the Stonebridge HOA, 4.55 km. south of the GNIS location of Golden. Mixed foothills grassland and shrubland; previously collected here: Brickellia eupatorioides and Xanthisma spinulosum. 1 Sep 2021. (CS, COLO2706695^‡).
3187, Guy Gulch. Southwest side of County Road 70 and the gulch, 640 m. northwest of Centennial Ranch, 12.8 km. northwest of the GNIS location of Golden. Lightly shaded floor of gulch. 31 Jul 2023. (OBI, JCOS).
3207, Guy Gulch. Work or parking area in front of ranch sheds, 40 m. southeast of the Centennial Ranch house, 15.8 km. (geodesic) northwest of Golden. With Dieteria bigelovii. Distance from Golden was measured as 15.8 km in planar mode in error, whereas a more accurate distance would be 12.2 km. measured in geodesic mode. 8 Sep 2023. (COLO, EIU, UCR, KHD ^‡).
3229, Magpie Gulch. Mouth of Magpie Gulch on the southeast flank of Mount Galbraith, 1.72 km. (geodesic) west northwest of the GNIS location of Golden. Floor of gulch, full sun and high shade, with Heliomeris multiflora, Cynoglossum officinale, Hypericum perforatum, Mentha spicata, Monarda fistulosa, and Rubus deliciosus. 19 Sep 2023. (CDA, COG, UCR, OBI).

Symphyotrichum spathulatum (Lindl.) G. L. Nesom.  (Syn: Aster occidentalis (Nutt.) Torr. & A. Gray , Aster occidentalis (Nutt.) Torr. & A. Gray var. fremontii ) Western Mountain Aster.
498, Bohler Canyon. Along the dirt road on the south side of Bohler Canyon, 1.8 mi (3.0 km) by air west of US Highway 395. 2 Aug 2007. (UCR250026^‡).
708, Big Sand Flat. In the east end of Big Sand Flat where Dry Creek enters the flat. 26 Aug 2010. (CAS1131419^‡, UC1980381^‡).
715, Sagehen Meadow. On the edge of the swale draining the meadow. 28 Aug 2010. (CAS1131423^‡, UC1980418^‡).
724, Rush Creek. On the bank of Rush Creek, 3.2 mi. downstream from US Highway 395, and 1.1 mi. upstream from Test Station Road. 1 Sep 2010. (CAS1131428^‡, UC1980408^‡).
3089, Salt Creek. Terrace above Salt Creek, just off Forest Road 435 “Salt Creek Road,” 2.8 mi. by road west of US Highway 285, 111 km. southwest of Golden. Dry, lightly shaded, terrace above the creek. Also collected here: Lappula occidentalis, Astragalus hallii, and seen: Dodecatheon pulchellum, and Iris missouriensis. Variety spathulatum, if infraspecific names are to be applied. 17 Jul 2023. (CS, OBI, UCR, KHD ^‡).

Symphyotrichum spathulatum (Lindl.) G. L. Nesom var. intermedium (A. Gray) G. L. Nesom.  (Syn: Aster occidentalis (Nutt.) Torr. & A. Gray var. intermedius A. Gray ) Larger Western Mountain Aster.
1018, Walker Creek (Lower). On the edge of Walker Creek, just downstream from the crossing of old US Highway 395, 4.5 miles by road south of Lee Vining. In the bank of the creek. 24 Jul 2013. (CAS1202038^‡, OBI176848^‡, UC2045740^‡, UCR262142^‡).