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Detailed Area Plant List for Clear Creek Canyon Park -- Wildflower Walk, Jefferson County, United States.
Edited by Tom Schweich
This list is assembled from personal collections, herbarium vouchers, and published lists. For California, much of the data is provided by the participants of the Consortium of California Herbaria as indicated by a single dagger “†.” Their web site is at: (http://ucjeps.berkeley.edu/consortium/). For Colorado, much of the data is provided by the Southwest Environmental Information Network as indicated by a double dagger “‡,” which web site is found at (http://swbiodiversity.org). See their respective websites for copyright information and recommended citation formats.
For a complete list of Locations included in this Area List, see the Locations Included section, below.
For a check list, please see: Check List for Clear Creek Canyon Park -- Wildflower Walk, Jefferson County, United States.
Equisetaceae
Equisetum laevigatum A. Braun. Smooth Horsetail. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk, iNaturalist Observation 52324023. kurtonthedirt 5860. 7/7/2020. .
Cupressaceae
Juniperus scopulorum Sarg. (Syn: Sabina scopulorum Sarg.(Sarg.) Rydb. ) Rocky Mountain Juniper. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 280320353.
scoppfranz 5759.
5/11/2025.
.
Pinaceae
Pinus scopulorum Lemmon. (Syn: P. ponderosa Laws. var. scopulorum Engelm. ) Rocky Mountain yellow pine. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 279485967.
carolinetrotter 5761.
5/7/2025.
iNaturalist Observation 280439927.
scoppfranz 5762.
5/11/2025.
.
.
 East slope of Tarryall Mountains from Camp Site 8. |
 Coll. No. 1316, Pinus |
 Rocky Mountain yellow pine on top of North Table Mountain. |
Pseudotsuga menziesii (Mirb.) Franco var. glauca (Beissn.) Franco. (Syn: Pseudotsuga menziesii (Mirb.) Franco var. glauca (Mayr) Franco ) Douglas-fir. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 341618501.
everett-o 5769.
11/8/2025.
iNaturalist Observation 345379190.
mramlow 5767.
3/26/2026.
.
Anacardiaceae
Rhus trilobata Nutt. var. trilobata. (Syn: Rhus aromatica Aiton var. trilobata (Nutt.) A. Gray ex S. Watson ) Skunkbush Sumac. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 279482996.
carolinetrotter 5444.
5/7/2025.
iNaturalist Observation 280317211.
scoppfranz 5445.
5/11/2025.
.
.
Toxicodendron rydbergii (Small ex Rydb.) Greene. Western Poison Ivy. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 280332208.
scoppfranz 5459.
5/11/2025.
.
 Western Poison Ivy on the backbone of Dakota Ridge. |
Asteraceae
Achillea millefolium L. (Syn: A. lanulosa Nutt. , A. m. L. var. alpicola (Rydb.) Garrett , A. m. L. var. lanulosa (Nutt.) Piper , A. m. L. var. occidentalis DC. ) Common Yarrow. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
Perennial herb to 50 cm.;; Leaves alternate, tendrils absent, finely dissected, aromatic when fresh; Inflorescence, heads enclosed by an involucre, in flat-topped clusters; Phyllaries in 2+ series; Receptacles bearing scale-like bracts (paleate); Perianth in 2 or more whorls, parts in 5s; Phyllaries in 2+ series, not all subtending ray flowers; Flowers open, bisexual, two kinds, some with strap-shaped corollas; Petals fused into a tube; Ray flowers, white, lobe ovate; Disc flowers, white; Stamens = in number to corolla lobes; Ovary inferior. Pistils, 1 per flower (Described from Coll. No. 482, 30 Nov 2011, and Coll. No. 1023, 24 Jul 2013).
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 221150730.
brent4618 5633.
6/7/2024.
.
.
Artemisia frigida Willd. Prairie Sagewort. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
Perennial herb, to 30 cm., woody at base; Stems many; Leaves alternate, 9 mm., pinnately dissected into 7 parts, silvery hairy; Inflorescence raceme-like, indeterminate, heads 1-3 in axils; Heads have only disk flowers, all alike; Involucre of hairy phyllaries; Phyllaries in 2 series, hairy, not gummy or with tips recurved; Receptacle hairy, not chaffy or bristly; Flowers fertile; Pappus absent; (Described from Coll. No. 1067, 8 Oct 2014).
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 345379216.
mramlow 5637.
3/26/2026.
.
.
 Coll. No. 1067, Artemisia frigida |
 Coll. No. 3507, Artemisia frigida. |
 Coll. No. 1067, Artemisia frigida |
 Coll. No. 1067, Artemisia frigida |
Brickellia californica (Torrey & A. Gray) A. Gray. California Brickelbush. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 323351063.
plantsplants300 5646.
10/26/2025.
.
.
Carduus nutans L. (Syn: Carduus nutans L. ssp. macrolepis (Peterman) Kazmi ) Nodding Plumeless Thistle. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
Annual, to 55 cm., tap-rooted, branched at base; Leaves, basal, withered at flowering, cauline, alternate, decurrent 40 mm. + blade 75 mm. × 25 mm. wide, pinnately lobed, margins spiny; Inflorescence, single heads on spiny tomentose peduncles 2.5-15 cm.; Phyllaries, many graduated series, 9-20 mm. × 1-3 mm. wide, thick at base, mostly green, purplish at margins, mid-vein prominent, tip spiny; Receptacle, alveolate (honeycombed), flat, bristly; Disk flowers, 25 mm., color purple; Pappus, capillary bristles, 18 mm. (Described from Coll. No. 1517, 24 July 2016.)
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 226323545.
bdearle 5648.
6/30/2024.
iNaturalist Observation 129985014.
kay_hellmann 5647.
8/7/2022.
.
.
 Carduus nutans rosette. |
 Coll. No. 1711, Carduus nutans |
 Coll. No. 2551, Carduus nutans |
Erigeron flagellaris A. Gray. Trailing Fleabane. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
Perennial, to 5-6 cm., with scapose inflorescence to 9 cm., spreading by leafy stoloniferous branches; Leaves, basal and cauline, entire, basal, linear-oblanceolate, 35 mm. × 2.5 mm., cauline, linear, 13 mm. × 1.5 mm.; Inflorescence, single heads on scape to 8 cm.; Receptacle epaleate; Phyllaries, 2+series, ±equal, 4 mm., hairy abaxially, ascending multicellular hairs with clear crosswalls, glandular between hairs; Flowers of 2 kinds; Pappus of bristles, 2 mm., + short scales, that of ray and disc flowers alike; Rays, #±80, corolla white, fading lilac, 8 mm. × 0.5 mm.; Disc flowers, corolla yellow, lobes triangular; Achene, short hairy. (Described from Coll. No. 1116, 28 May 2015).
- Clear Creek Canyon Park -- Wildflower Walk,
5279.
5/8/2026.
iNaturalist Observation 278216367.
darrin30 5655.
5/3/2025.
.
.
 Coll. No. 2537.1, Erigeron flagellaris |
 Coll. No. 1116, Erigeron flagellaris |
 Coll. No. 1829, Erigeron flagellaris |
 Coll. No. 1829, Erigeron flagellaris |
Grindelia subalpina Greene. Subalpine Gumweed. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
Perennial herb, 45-60 cm.; Stem, light brown, glabrous; Leaves, cauline, alternate, sessile, blade 45 mm. × 12 mm. wide, reduced distally, oblanceolate, adaxially glandular, margins, dentate, teeth separated 3-5 mm., apiculate; Inflorescence, heads, #3-4 per stem, not overtopped by leaves, showy, gummy exudate; Involucre, 10 mm. × 13 mm. wide, globose, resinous; Phyllaries, in 5± unequal graduated series, lower << rest of involucre, upper 8 mm. × 1.3 mm. wide, resinous, margins, flat, tips, acuminate, lower coiled 360°; Pappus, few, well developed bristles, 3.5 mm, readily falling; Style, 2-branched, stigmatic portion 0.6 mm. + appendages 0.6 mm.; Cypsela, 1.6 mm. × 0.6 mm. wide, black, glabrous. (Described from Coll. No. 3530, 18 September 2025.)
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 279484510.
carolinetrotter 5660.
5/7/2025.
iNaturalist Observation 279486140.
carolinetrotter 5661.
5/7/2025.
.
.
 Obs. No. 4396, Grindelia subalpina. |
 Obs. No. 4392, Grindelia subalpina in DeLong Park. |
 Coll. No. 3530, Grindelia subalpina. |
Helianthus pumilus Nutt. Little Sunflower. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
Perennial herb, to 40 cm.; Leaves, cauline, alternate, occasionally opposite, then bases conjoined, simple, petiole 7-10 mm. + blade 55-86 mm. × 22-30 mm. wide, lanceolate, flat (not folded), margin, entire to lightly toothed, adaxial, pustular strigose, hairs multicellular, crosswalls clear, abaxial, glandular and strigose; Inflorescence, heads single to few on leafy stems, peduncles to 8-10 cm., hairy, glandular; Involucre, 9 mm. × 16 mm. wide; Phyllaries in 2+ series, similar, 6-10 mm. × 2.0-3.5(4) mm. wide, greene erect, ovate, strigose abaxially, margins ciliate, tip acuminate, not as “stiff” or “tough” as those of Coll. No. 1199; Receptacle, slightly convex, paleate; Disk, 17 mm. wide; Palea, 9 mm., tip, glandular, hairy distally; Flowers, 2 kinds; Ray flowers, sterile, #10-12, corolla, 17-25 mm. × (4)6-9 mm. wide, yellow; Disk flowers, corolla, 4-6 mm., yellow, lobes, #5, 1 mm., yellow, anther appendages reddish-brown; Pappus of few long (2.5-4 mm.) aristate scales; Cypsela, 3.5 mm. × 1.4 mm. wide, quadrangular,not laterally compressed black. Described from Coll. No. 1210, 1426, and 1704.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 217321317.
geoskimom 5664.
5/20/2024.
iNaturalist Observation 169490207.
inaptonym 5663.
6/24/2023.
iNaturalist Observation 169084368.
tbross14 5662.
6/23/2023.
.
.
 Coll. No. 1704, Helianthus pumilus |
 Coll. No. 1426, Helianthus pumilis |
Heterotheca villosa (Pursh) Shinners. (Syn: H. v. (Pursh) Shinners var. nana (A. Gray) Semple , H. v. (Pursh) Shinners var. villosa ) Hairy False Goldenaster. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
Perennial herb, to 50 cm.; Leaves, cauline alternate, entire, 1-veined, distal perpendicular to stems, hairs > glands; Heads solitary, with both ray and disk flowers; Phyllaries in 2+ series, unequal, to 7 mm.; Rays, 9 mm.; Pappus double, outer narrow scales ≤ 1 mm. (easier to see on mature fruit), inner bristles, 6.5 mm., white; Fruit, disk 3 mm., hairy.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 309391264.
scoppfranz 5667.
8/23/2025.
.
.
Rudbeckia laciniata L. Cut-Leaf Coneflower.. CalPhotos. Jepson eFlora. SEINet Taxon.
- Clear Creek Canyon Park -- Wildflower Walk, iNaturalist Observation 309339082. scoppfranz 5682. 8/23/2025. . .
Senecio integerrimus Nutt. Columbia Ragwort. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
Not S. integerrimus?
iNaturalist Observation 217321329.
geoskimom 5683.
5/20/2024.
iNaturalist Observation 349346883.
kracken 5687.
4/2/2026.
.
.
Senecio triangularis Hook. Arrowleaf Ragwort. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 80 cm., in shaded streamside, not strongly scented; Root and caudex unknown; Petiole 100 mm.; Leaves alternate, largest 100 mm. x 60 mm., distributed along stem gradually becoming smaller, ovate, base truncate, margin toothed, adaxial surface sticky with glandular exudate, glands inconspicuous; Inflorescence gen. flat-topped, 10-15 flowers; Phyllaries, in 1-series, few short narrow outer phyllaries, tips dark brown macroscopically; Receptacle palea 0; Flowers of 2 kinds, both ray and disk; Pappus of bristles (no scales or needle-like awns), well developed on ray and disk flowers; Ray flowers yellow, exceeding involucre (Described from Coll. No. 874, 23 June 2013).
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 280333146.
scoppfranz 5689.
5/11/2025.
.
 Habitat of Coll. No. 874, Senecio triangularis |
 Coll. No. 874, Senecio triangularis |
 Coll. No. 2003, Senecio triangularis |
 Coll. No. 2003, Senecio triangularis |
Berberidaceae
Berberis repens Lindl. (Syn: Mahonia repens (Lindl.) G. Don ) Creeping Barberry. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 294206045.
arminda_barrett 5842.
6/30/2025.
iNaturalist Observation 339088858.
arminda_barrett 5847.
2/17/2026.
iNaturalist Observation 267612141.
cathybaird 5833.
3/29/2025.
iNaturalist Observation 266921112.
emmanueljuradomares 5832.
3/25/2025.
iNaturalist Observation 349346836.
kracken 5853.
4/2/2026.
iNaturalist Observation 345379000.
mramlow 5849.
3/26/2026.
iNaturalist Observation 295972333.
placker 5843.
7/6/2025.
iNaturalist Observation 280332851.
scoppfranz 5841.
5/11/2025.
iNaturalist Observation 206602456.
scottysmith 5821.
4/7/2024.
iNaturalist Observation 236832102.
seanhankins 5828.
8/19/2024.
iNaturalist Observation 347689225.
six1 5852.
4/5/2026.
iNaturalist Observation 215171643.
tshoemaker2027 5825.
5/1/2024.
iNaturalist Observation 106104891.
whimbrelbirder 5816.
1/15/2022.
iNaturalist Observation 303281771.
xpackie 5844.
8/2/2025.
.
 Coll. No. 1309, Berberis repens |
 Habitat of Coll. No. 1782, Berberis repens. |
 Coll. No. 1309, Berberis repens |
Betulaceae
Betula occidentalis Hook. (Syn: Betula fontinalis Sarg. ) Water Birch. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 323350964.
plantsplants300 5737.
10/26/2025.
.
 Water Birch (Betula occidentalis) along Clear Creek. |
 Coll. No. 3435, Betula occidentalis. |
 Coll. No. 2644, Betula occidentalis. |
Boraginaceae
Cynoglossum officinale L. Gypsyflower. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
6177.
6/3/2026.
.
.
Phacelia hastata Douglas ex Lehm. Silverleaf Phacelia. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
6176.
6/3/2026.
.
.
 Coll. No. 2081, Phacelia heterophylla |
 Coll. No. 3494, Phacelia hastata. |
Phacelia heterophylla Pursh. Varileaf Phacelia. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
Described by Pursh (1814) from a collection by M. Lewis Jun-Jul, 1806 on the banks of the Kooskooskie (Clearwater) River.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 93597789.
thecaiman1 5553.
9/4/2021.
.
 Habitat of Coll. No. 1138, Phacelia heterophylla |
Coll. No. 2081, Phacelia heterophylla |
Brassicaceae
Physaria vitulifera Rydb. Bull. Torrey Bot. Club 28: 278. 1901. (Syn: P. vitulifera × bellii ) Roundtip Twinpod. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
Perennial, terrestrial herb, caespitose, stellate hairy throughout, flowering branches to 15 cm.; Roots, tap; Stem, scapose, hairs as above; Leaves, basal and cauline, basal, petiole 10-35 mm. + blade 22-24 mm. × 8-14 mm. wide, elliptic, weakly pinnately lobed, to few basal leaves with a single pair of teeth, otherwise entire, tip barely acuminate, cauline, alternate, nearly sessile, 13-22 mm. × 4-4.5 mm. wide, oblancelate, margin entire; Pedicel, 5 mm., ascending, becoming s-shaped in fruit; Sepals, #4, 5-7 mm. × 1.5 mm. wide, lanceolate, green, hairy as above; Flowers, Petals, #4, 10 mm. × 2-2.5 mm. wide, obovate, margin entire, color yellow; Stamens, #6 (4 long, 2 short), 6-8 mm.; Filaments, 4.5-6 mm., pair of short filaments slightly winged proximal ½; Anthers, 1.5 mm., saggitate (?); Ovary, 2 mm. × 1.8 mm. wide; Style, #1, 4-6.4 mm., persistent, not elongating in fruit; Fruit, pedicels, 18-20 mm, longest sigmoid, hairs as above, mature fruit, didymous, 3-4.5 mm. × 4 mm. wide, round, apical sinus well-developed, basal sinus much less so, hairy as above; Ovules, 4 per ovary (Described from Coll. No. 1345, 12 May 2016 and Coll. No. 1828, 16 May 2018). Some will key to P. bellii in Ackerfield (2015) at couplet 17 per the shape of the basal leaves, which can be entire to very shallowly once dentate. However, FNANM sends this in the direction of P. vitulifera at couplet 12 based on the relative development of the basal and apical sinuses of the fruit.
- Clear Creek Canyon Park -- Wildflower Walk,
hydroseeded soil slope with Phacelia heterophylla
Tom Schweich 2469.
4/18/2022.
Tom Schweich 2470.
4/18/2022.
Tom Schweich 2471.
4/18/2022.
Tom Schweich 2472.
4/18/2022.
.
Cactaceae
Opuntia polyacantha Haw. Plains Pricklypear. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 221150775.
brent4618 5512.
6/7/2024.
iNaturalist Observation 279484823.
carolinetrotter 5514.
5/7/2025.
iNaturalist Observation 345607615.
emmyag 5521.
3/27/2026.
iNaturalist Observation 287206310.
gryfer29 5516.
6/5/2025.
iNaturalist Observation 129984837.
kay_hellmann 5509.
8/7/2022.
iNaturalist Observation 345379160.
mramlow 5520.
3/26/2026.
iNaturalist Observation 149837141.
normherr 5510.
2/27/2023.
iNaturalist Observation 296233087.
placker 5519.
7/6/2025.
iNaturalist Observation 280332504.
scoppfranz 5515.
5/11/2025.
.
.
Pediocactus simpsonii (Engelm.) Britton & Rose. (Syn: Echinocactus simpsonii Engelm. , Pediocactus simpsonii (Engelm.) Britton & Rose var. minor (Engelm.) Cockerell ) Mountain Ball Cactus. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 81801479.
davidemartin 5522.
6/5/2021.
.
Campanulaceae
Campanula petiolata A. DC. (Syn: Campanula rotundifolia L. ) Western Harebell. CalPhotos. Jepson eFlora. SEINet Taxon.
- Clear Creek Canyon Park -- Wildflower Walk, iNaturalist Observation 328270027. hannahchase 5630. 11/25/2025. iNaturalist Observation 7167528. larry522 5624. 7/22/2017. iNaturalist Observation 287088556. monypony 5629. 6/5/2025. .
Cannabaceae
Celtis reticulata Torr. (Syn: Celtis laevigata Willd. var. reticulata L. D. Benson ) Net-Leaved Hackberry. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
6170.
6/3/2026.
.
.
Humulus neomexicanus (A. Nelson & Cockerell) Rydb. New Mexican Hops. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 217321289.
geoskimom 5743.
5/20/2024.
iNaturalist Observation 217321299.
geoskimom 5744.
5/20/2024.
iNaturalist Observation 129984932.
kay_hellmann 5741.
8/7/2022.
iNaturalist Observation 280316961.
scoppfranz 5746.
5/11/2025.
Tom Schweich 2446.
9/29/2021.
Tom Schweich 2447.
9/29/2021.
Tom Schweich 2448.
9/29/2021.
Tom Schweich 2449.
9/29/2021.
Tom Schweich 2450.
9/29/2021.
Tom Schweich 2451.
9/29/2021.
Tom Schweich 2452.
9/29/2021.
Tom Schweich 2458.
9/29/2021.
Tom Schweich 2460.
9/29/2021.
Tom Schweich 2461.
9/29/2021.
Tom Schweich 2462.
9/29/2021.
Tom Schweich 2463.
9/29/2021.
below flume, male plant
Tom Schweich 3373.
8/29/2023.
upper side of flume, female plant
Tom Schweich 3374.
8/29/2023.
large patch above flume
Tom Schweich 3375.
8/29/2023.
bank of ditch, no fruit, some above ditch
Tom Schweich 3376.
8/29/2023.
above and below flume
Tom Schweich 3377.
8/29/2023.
Tom Schweich 3378.
8/29/2023.
.
Caryophyllaceae
Cerastium arvense L. ssp. strictum Gaudin. (Syn: Cerastium strictum L ) Field Chickweed. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
Common early-flowering perennial, to 20 cm.; Leaves, opposite, broadly linear, 15 mm. × 3 mm. wide, stipules absent, tufts of leaves in lower axils; Sepals free; Petals >> sepals, white, notched; Styles (4)5.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 353158216.
brian2445 5779.
4/24/2026.
iNaturalist Observation 345822363.
suzanne11 5778.
3/28/2026.
.
.
Pseudostellaria jamesiana (Torr.) W. A. Weber & R. L. Hartm. (Syn: Stellaria jamesiana Torr. ) Tuber Starwort. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 217321293.
geoskimom 5781.
5/20/2024.
iNaturalist Observation 217321303.
geoskimom 5782.
5/20/2024.
.
.
 Coll. No. 2069.2, Pseudostellaria jamesiana |
 Coll. No. 2787, Pseudostellaria jamesiana |
Silene latifolia Poir. (Syn: Lychnis alba Mill. , Melandrium dioicum (L.) Cosson & Germain ) Bladder Campion. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 169387000.
steppesun 5791.
6/25/2023.
.
 Coll. No. 2127, Silene latifolia |
 Flower of Coll. No. 2127, Silene latifolia |
Convolvulaceae
Convolvulus arvensis L. Field Bindweed. Weed: CO DofA, List: C. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 305798873.
hairybeetle7 5542.
8/12/2025.
.
 Habitat of Coll. No. 1220, Convolvulus arvensis |
 Coll. No. 1220, Convolvulus arvensis |
Crassulaceae
Sedum lanceolatum Torr. (Syn: Amerosedum lanceolatum (Torr.) A. Löve & D. Löve ) Spearleaf Stonecrop. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
Type collected by Edwin James on the Long Expedition, described by Torrey, 1827.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 287195457.
gryfer29 5285.
6/5/2025.
.
Fabaceae
Medicago sativa L. Alfalfa. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk, iNaturalist Observation 169082765. tbross14 5413. 6/23/2023. . .
Melilotus officinalis (L.) Lam. Yellow Sweet Clover. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 170200025.
jeremy887 5418.
6/29/2023.
iNaturalist Observation 169083841.
tbross14 5417.
6/23/2023.
.
 Inflorescence of Coll. No. 1687, Melilotus officinalis |
Grossulariaceae
Ribes aureum Pursh. Golden Currant. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
Coll. No. 1319, 4 May 2016: Perennial shrub, to 1 m.; Stem, unarmed; Leaves, fascicled, broadly ovate, 29 mm. × 22 mm. wide, lobes 3, obtuse; Hypanthium, 9 mm., bright yellow; Sepals, petaloid, 5 mm.; Petals, 2.5 mm.; Ovary, 2 mm.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 52324185.
kurtonthedirt 5289.
7/7/2020.
.
.
 Habitat of Coll. No. 1834, Ribes aureum. |
 Grossulariaceae Ribes aureum |
 Grossulariaceae Ribes aureum |
 Ribes aureum in winter. |
 Twigs of Ribes aureum in winter. |
 Coll. No. 1834, Ribes aureum. |
Ribes cereum Douglas. Wax Currant. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 279483338.
carolinetrotter 5297.
5/7/2025.
iNaturalist Observation 267639057.
cathybaird 5294.
3/29/2025.
iNaturalist Observation 294322926.
monypony 5298.
7/1/2025.
iNaturalist Observation 345379114.
mramlow 5300.
3/26/2026.
iNaturalist Observation 345822989.
suzanne11 5301.
3/28/2026.
.
 Developing fruit on Ribes cereum. |
 Coll. No. 1091, Rubus deliciosus |
 Coll. No. 1092, Ribes cereum |
Loasaceae
Mentzelia multiflora (Nutt.) A. Gray. (Syn: Nuttallia multiflora (Nutt.) Greene ) Adonis Blazing Star. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk, iNaturalist Observation 52323908. kurtonthedirt 5497. 7/7/2020. .
Malvaceae
Malva neglecta Wallr. Common Mallow. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk, iNaturalist Observation 185767538. emlok 5489. 10/1/2023. iNaturalist Observation 323350990. plantsplants300 5490. 10/26/2025. .
Montiaceae
Claytonia rosea Rydb. Rocky Mountain Springbeauty. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 217321304.
geoskimom 5775.
5/20/2024.
.
Papaveraceae
Argemone polyanthemos (Fedde) G.B. Ownbey. Crested Prickly Poppy. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
6171.
6/3/2026.
.
Plantaginaceae
Linaria dalmatica (L.) Mill. (Syn: Linaria dalmatica (L.) Mill. ssp. dalmatica , Linaria genistifolia (L.) Mill. ssp. dalmatica (L.) Maire & Petitm. ) Dalmatian ToadFlax. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 279484671.
carolinetrotter 5598.
5/7/2025.
iNaturalist Observation 166169600.
jeremy887 5591.
6/7/2023.
iNaturalist Observation 81384286.
kurtonthedirt 5588.
6/2/2021.
.
.
Penstemon strictus Benth. Rocky Mountain Penstemon. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk, iNaturalist Observation 221150530. brent4618 5607. 6/7/2024. iNaturalist Observation 217321313. geoskimom 5605. 5/20/2024. iNaturalist Observation 289508322. jillsnaturefun 5610. 5/26/2025. . .
Penstemon virens Pennell ex Rydb. Front Range Beardtongue. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 286356478.
dgunn17 5623.
6/2/2025.
iNaturalist Observation 216419919.
jennyboyle 5615.
5/17/2024.
iNaturalist Observation 81384431.
kurtonthedirt 5613.
6/2/2021.
iNaturalist Observation 280290574.
scoppfranz 5620.
5/11/2025.
.
.
Plantago lanceolata L. Narrowleaf Plantain. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
Perennial herb, to 55 cm., scapose; Leaves, basal, 22 cm. × 1.5 mm. wide, lance-elliptic, glabrous; Inflorescence, spike, 42 mm. × 6-7 mm. wide, slightly wider at base; Sepals, outer two connate, 3 mm., mid-rib strong green, villous-ciliate distally; Corolla, scarious, lobes, #4, 2 mm. Described from Coll. No. 1217, 16 Jul 2015.
- Clear Creek Canyon Park -- Wildflower Walk,
6174.
6/3/2026.
.
 Coll. No. 2147, Plantago lanceolata |
Polygonaceae
Eriogonum alatum Torrey in L. Sitgreaves, Rep. Exped. Zuni Colorado Rivers. 168, plate 8. 1853. (Syn: Pterogonum alatum (Torr.) Gross ) Winged Buckwheat. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
collected seed
Tom Schweich, with John Vickery 3395.
9/8/2023.
.
.
Eriogonum umbellatum Torr. var. umbellatum. Sulphur-Flower Buckwheat. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
Type collected “near the Rocky Mountains” by Edwin James, 1820. Described by Torrey in 1827.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 287206356.
gryfer29 5757.
6/5/2025.
.
Primulaceae
Primula pauciflora (Durand) A. R. Mast & Reveal var. pauciflora. (Syn: Dodecatheon pulchellum (Raf.) Merr. ) Darkthroat Shooting Star. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
Formerly Dodecatheon pulchellum.
iNaturalist Observation 217321291.
geoskimom 5532.
5/20/2024.
iNaturalist Observation 217321300.
geoskimom 5533.
5/20/2024.
iNaturalist Observation 283655072.
monypony 5534.
5/24/2025.
.
 Coll. No. 2287, Docecatheon pulchellum |
 Coll. No. 2927, Dodecatheon pulchellum in Magpie Gulch. |
 Coll. No. 2459, Dodecatheon pulchellum |
 Coll. No. 2927, Dodecatheon pulchellum |
Ranunculaceae
Cyrtorhyncha ranunculina Nutt. Ex Torrey & A. Gray. (Syn: Ranunculus ranunculinus (Nutt.) Rydb. ) Tadpole Buttenrcup. CalPhotos. Jepson eFlora. SEINet Taxon.
- Clear Creek Canyon Park -- Wildflower Walk, Tadpole buttercup. Formerly Ranunculus ranunculina. iNaturalist Observation 217321290. geoskimom 5810. 5/20/2024. . .
Delphinium nuttallianum Pritz. Twolobe Larkspur. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 351014190.
micaylawerner 5812.
4/15/2026.
.
Rosaceae
Amelanchier alnifolia (Nutt.) Nutt. ex M. Roem. Saskatoon Serviceberry. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
Shrub, to 1 m.; Stems, branches unarmed; Leaves, simple, petiole, 8 mm., blade, 22-32 mm. × 19-32 mm. wide, veins, pinnate, surface, sparsely hairy above, sparsely to moderately hairy below, margin, serrate; Flowers, borne singly, pedicels, 10 mm., petals 9 mm. × 4.5 mm. wide, color cream; Ovary, inferior, tip hairy; Styles, #(4)5 (Described from Coll. No. 1800-1801, 7 May 2018)
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 345822566.
suzanne11 5311.
3/28/2026.
.
.
Cercocarpus montanus Raf. Alder-Leaf Mountain Mahogany. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
Described by Rafinesque from a specimen collected by Edwin James of the Long Expedition, 1820, probably in present Jefferson County, Colorado. Rafinesque was somewhat frustrated by Torrey's reluctance publish a new species name in assigning James' collection to C. fothergillides Humb. Bonpl. And Kunth.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 279485364.
carolinetrotter 5323.
5/7/2025.
iNaturalist Observation 149187010.
kestrel_fishing 5317.
2/19/2023.
.
.
Holodiscus discolor (Pursh) Maxim. var. dumosus (S. Watson) Maxim. Ex J. M. Coult. (Syn: H. dumosus (Nutt. ex Torr. & A.Gray) A.Heller ) Rock Spiraea. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk, 5280. 5/8/2026. iNaturalist Observation 279482942. carolinetrotter 5334. 5/7/2025. iNaturalist Observation 217321276. geoskimom 5332. 5/20/2024. iNaturalist Observation 280317140. scoppfranz 5335. 5/11/2025. iNaturalist Observation 280331981. scoppfranz 5336. 5/11/2025. . .
Physocarpus monogynus (Torr.) J.M. Coult. (Syn: Spiraea monogyna Torr. ) Mountain Ninebark. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
Shrub, height unknown (growing in ravine); Leaves, alternate, simple, hairs stellate, petiole, 10 mm., blade, 30 mm. × 33 mm. wide, ovate, palmate-veined, doubly crenate; Inflorescence, umbellate corymb, ±20-flowered; Pedicels, 8-12 mm.; Flowers, limb, 12 mm., petals, 4.5 mm., color cream; Styles, 2 (Described from Coll. No. 1397, 8 June 2016).
- Clear Creek Canyon Park -- Wildflower Walk,
5281.
5/8/2026.
iNaturalist Observation 217321282.
geoskimom 5341.
5/20/2024.
.
.
Prunus americana Marshall. American Plum. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
Perennial woody shrub, spreading, to 2 m., blooming before leafing out; Branches, unarmed, glabrous when young, peeling to brown; Leaves, (immature, at time of flowering), simple, 15-19 mm. × 5.5-8 mm. wide, lanceolate or elliptic-rhomboid, pinnately veined, glabrous, margin toothed, teeth eglandular, base slightly hairy, petiole 3 mm., adaxially hairy; Flowers, in small groups of 2-3; Pedicels, 9-18 mm., glabrous to sparsely hairy; Hypanthium, 2 mm.; Sepals, 2.5-2.8 mm., reflexed, few cobwebby hairs adaxially; Petals, free, white, 5-7 mm. × 2.5-4.5 mm. wide; Stamens, many (30?); Ovary superior; Styles #1, 10 mm.; Fruit unknown (Described from Coll. No. 1093, 30 Apr 2015, and Coll. No. 1819, 16 May 2018).
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 160408369.
jeremy887 5347.
5/7/2023.
.
.
Prunus virginiana L. Chokecherry. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
The most useful distinction is between chokecherries found east of the Rocky Mountains, var. virginiana and those found from the mountains westward, var. demissa. Plants of the High Plains show intergradation between those of the Rockies and those of the East.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 217321269.
geoskimom 5356.
5/20/2024.
iNaturalist Observation 303282140.
xpackie 5363.
8/2/2025.
.
.
Rosa acicularis Lindl. ssp. sayi (Schwein.) W. H. Lewis. (Syn: Rosa acicularis Lindl. , Rosa sayi Schweinitz ) Say's Acicular Rose. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
Prickles on new growth, leaflets 5-7(9), flowers 1-3
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 119622082.
eririv 5366.
5/31/2022.
.
.
 Rosa acicularis ssp. sayi on North Table Mountain. |
 Coll. No. 3027, Rosa acicularis ssp. sayi. |
 Coll. No. 3398, Rosa acicularis ssp. sayi. |
 Coll. No. 2545, Rosa acicularis var. sayi |
Rosa glauca Pourr. Red-leaved Rose. CalPhotos. Jepson eFlora. SEINet Taxon.
- Clear Creek Canyon Park -- Wildflower Walk, 5282. 5/8/2026. 6173. 6/3/2026. . .
Rubus deliciosus Torr. (Syn: Oreobatus deliciosus Torr.(E. James ex Torr.) Rydb. ) Delicious raspberry. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
Perennial shrub, to 1.5 m.; Stem, bark, shreddy; Leaves, simple, 17 mm. × 23 mm. wide, palmate veined, lobed, serrate, few straight hairs, petiole, 11 mm.; Flowers, white, solitary, 17-19 mm.; Fruit, unknown (Described from Coll. No. 1091, 30 Apr 2015).
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 164262370.
dawnh11 5374.
5/28/2023.
iNaturalist Observation 217321332.
geoskimom 5376.
5/20/2024.
iNaturalist Observation 115942753.
jbedingh 5372.
5/7/2022.
iNaturalist Observation 350039812.
micaylawerner 5386.
4/15/2026.
iNaturalist Observation 294166045.
monypony 5384.
6/30/2025.
iNaturalist Observation 280316756.
scoppfranz 5381.
5/11/2025.
.
Coll. No. 1091, Rubus deliciosus |
 Coll. No. 1091, Rubus deliciosus |
 Coll. No. 1091, Rubus deliciosus |
Rubiaceae
Galium aparine L. (Syn: Galium aparine L. var. echinospermum (Wallr.) Farw. , Galium spurium L. ) Sticky Willy, Cleavers. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
Annual/perennial unknown, weak-stemmed and scrambling through shrubs and grass; Stem, retrorsely scabrous on angles (but not densely so); Leaves, whorls of 6-8 (more leaves above, fewer below), 46 mm. × 4 mm. wide, oblanceolate, margins retrorsely scabrous, tips with a short spine; Flowers, corolla, greenish-white, lobes 1 mm.; Fruit, 1.3 mm., covered with hooked hairs (Described from Coll. No. 1395, 8 June 2016).
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 280317051.
scoppfranz 5863.
5/11/2025.
iNaturalist Observation 280333470.
scoppfranz 5864.
5/11/2025.
.
 Coll. No. 1395 Galium aparine |
Salicaceae
Populus angustifolia E. James. Narrowleaf Cottonwood. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
Collected and described by Edwin James of the Long Expedition, 1820.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 149835159.
normherr 5723.
2/27/2023.
.
 Coll. No. 2812, Populus angustifolia. |
 Bud scales of Coll. No. 2812, Populus angustifolia. |
Sapindaceae
Acer glabrum Torr. var. glabrum. (Syn: A. glabrum Torr. var. torreyi (Greene) Smiley ) Rocky Mountain Maple. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 277582877.
micaylawerner 5467.
4/29/2025.
iNaturalist Observation 296151939.
placker 5469.
7/6/2025.
.
.
Acer negundo L. (Syn: Acer negundo L. var. interius (Britton) Sarg. , Negundo aceroides (L.) Moench ) Box Elder. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
Tree, ±5 m.; Branches, young, soft short hairy (var. interius); Leaves, opposite, ternately compound, leaflets 3; Pistil 1; Stigma, branches 2; Fruit, 2 winged 1-seeded samaras. (Described from Coll. No. 1102, 11 May 2015).
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 279483446.
carolinetrotter 5480.
5/7/2025.
iNaturalist Observation 345379173.
mramlow 5484.
3/26/2026.
iNaturalist Observation 347689175.
six1 5486.
4/5/2026.
.
 Coll. No. 2457, Acer negundo. |
 Emerging staminate flowers of Acer negundo. |
 Britton & Shafer (1908) Figure 608, Acer interior. |
 Coll. No. 1102, 11 May 2015 |
 Coll. No. 2451, Acer negundo |
Saxifragaceae
Heuchera parvifolia Nutt. ex Torr. & A. Gray. Littleleaf Alumroot. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
… Inflorescence, (not secund) …
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 217321334.
geoskimom 5287.
5/20/2024.
.
 Coll. No. 1655, Heuchera parvifolia |
 Coll. No. 2928, Heuchera parvifolia. |
 Coll. No. 3274, Heuchera parvifolia. |
Scrophulariaceae
Scrophularia lanceolata Pursh. Lanceleaf Figwort. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 280332619.
scoppfranz 5560.
5/11/2025.
.
.
 Scrophularia lanceolata at Devils Churn Trail. |
Verbascum thapsus L. Common Mullein. Weed: CO DofA, List: C. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 279480663.
carolinetrotter 5575.
5/7/2025.
iNaturalist Observation 279483120.
carolinetrotter 5576.
5/7/2025.
iNaturalist Observation 131277175.
davisclay 5565.
8/17/2022.
.
 Package of Mullein in the Pharmacy at Fort Hartsuff. |
 Dense colonies of Common Mullein (Verbascum thapsus) in Cottonwood Canyon |
 Collection No. 512, Verbascum thapsus |
Solanaceae
Physalis hispida (Waterf.) Cronquist. Prairie Ground Cherry. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 169381831.
steppesun 5557.
6/25/2023.
.
 Coll. No. 2662, Physalis virginiana. |
 Coll. No. 2662, Physalis hispida. |
Ulmaceae
Ulmus pumila L. Siberian Elm. Weed: CO DofA, List: C. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 345656158.
micaylawerner 5739.
4/29/2025.
.
 Figure 1. Composite photo of Siberian elm (Ulmus pumila L.) |
Violaceae
Viola canadensis L. (Syn: Viola rydbergii Greene , Viola scopulorum (A. Gray) Greene ) Canadian White Violet. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 277738785.
jillian63608 5494.
5/1/2025.
iNaturalist Observation 280316723.
scoppfranz 5496.
5/11/2025.
growing against wood side of ditch, photographed.
Tom Schweich, with Cheryl Schweich 3041.
5/14/2023.
.
 Viola canadensis beside the Welch Ditch. |
 Viola canadensis out in an open sunny spot. |
 Coll. No. 2037, Viola canadensis |
 Coll. No. 2259, Viola canadensis |
Amaryllidaceae
Allium geyeri S. Watson. Geyer's Onion. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
Perennial herb, geophyte, to 40 cm.; Bulb, 20 mm. × 20 mm. wide, ovoid, outer coat with coarse fibers; Leaves, #2-3, 24 cm. × 1.5 mm. wide, somewhat withered at anthesis; Inflorescence, umbel; Bracts, #3, 14 mm., prominently 1-veined; Flowers, #29, tepals, 7 mm., pink; Seed, unknown (Described from Coll. No. 1417, 10 June 2016).
- Clear Creek Canyon Park -- Wildflower Walk,
5283.
5/8/2026.
iNaturalist Observation 217321292.
geoskimom 5699.
5/20/2024.
iNaturalist Observation 217321301.
geoskimom 5700.
5/20/2024.
iNaturalist Observation 333881907.
larryhiggins 5702.
5/20/2024.
iNaturalist Observation 281842277.
richieswift 5701.
5/17/2025.
.
 Habitat of Coll. No. 1417, Allium, perhaps A. geyeri |
 Coll. No. 1417, Allium geyeri |
Asparagaceae
Maianthemum racemosum (L.) Link ssp. amplexicaule (Nutt.) LaFrankie. (Syn: Maianthemum amplexicaule (Nutt.) W. A. Weber ) Feathery False Lily of the Valley. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 217321333.
geoskimom 5703.
5/20/2024.
.
 Coll. No. 2495, Maianthemum racemosum ssp. amplexicaule |
 Coll. No. 2942, Maianthemum racemosum ssp. amplexicaule. |
Commelinaceae
Tradescantia occidentalis (Britton) Smyth. Prairie Spiderwort. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 217321322.
geoskimom 5695.
5/20/2024.
iNaturalist Observation 165328073.
kathy_dbg 5693.
6/3/2023.
iNaturalist Observation 283654184.
monypony 5696.
5/24/2025.
iNaturalist Observation 353737808.
mstohlgren 5698.
4/25/2026.
iNaturalist Observation 323350978.
plantsplants300 5697.
10/26/2025.
.
 A Tradescantia occidentalis “Prairie Spiderwort” with intense color. |
 Habitat of Coll. No. 1142, Tradescantia occidentalis |
 Color variation in Tradescantia occidentalis. |
Poaceae
Bouteloua curtipendula (Michx.) Torr. Sideoats Grama. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 309339010.
scoppfranz 5500.
8/23/2025.
.
.
 Habitat of three common grasses in Windy Saddle Park |
 Coll. No. 1241, Bouteloua curtipendula |
 Coll. No. 1241, Bouteloua curtipendula |
Bromus inermis Leyss. (Syn: B. inermis Leyss. ssp. inermis ) Smooth Brome. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
Perennial grass to 1 m., rhizomatous; Leaves, sheath, 8-11 cm., closed, ligule, <1 mm., membraneous, blade, 12-17 cm × 0.5 cm., flat, soft, with a distinguishing fold, usually described as an “M” or a “W” that is difficult to see when dry; Inflorescence, panicle, 15 cm. × 4 cm. wide, multiple 1° branches per node, mostly on one side of rachis; Spikelets, 1 per node on 1° and 2° panicle branches, 15-24 mm. × 5 mm. wide, laterally compressed, 2-6 florets per spikelet; Glumes, 2, keeled, glabrous, lower, 7-8 mm., veins 1 upper, 8-10 mm., <lowest floret; Rachilla, sparsely hairy on abaxial side, extended beyond uppermost floret or not; Callus, small, glabrous; Lemma, 11-12 mm., veins, 3, 5, 7, obvious, tip bifid, some awned; Awn (when present), 1.0-1.6 mm., arising near tip of lemma; Palea, 9 mm., veins ciliate. (Described from Coll. No. 1113, 26 May 2014, and Coll. No. 1219, 16 Jul 2015).
- Clear Creek Canyon Park -- Wildflower Walk,
iNaturalist Observation 233390098.
leannhalgren 5501.
8/2/2024.
.
.
Dichanthelium scribnerianum (Nash) J. R. Thomas. (Syn: D. oligosanthes (J. A. Schultes) Gould ssp. scribnerianum (Nash) Freckmann & Lelong ) Few-Flowered Panicgrass. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
- Clear Creek Canyon Park -- Wildflower Walk, 6172. 6/3/2026. . .
Hesperostipa comata (Trin. & Rupr.) Barkworth. (Syn: Stipa comata Trin. & Rupr. ) Needle and Thread. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
Perennial, 50 cm., clumped, nonrhizomatous; Roots, fibrous; Stem, herbaceous; Leaves, blade and sheath differentiated; Sheath, 100-120 mm., open ≥½, glabrous; Ligule, membranous, length 3.7 mm., lacerate into 2 equal parts, auricles 0; Blade, 60 mm., involute, glabrous; Inflorescence, 1 per culm, >leaves, panicle, 200 mm. × 30 mm. wide; Rachis, not extended, somewhat scabrous throughout; Spikelets, many, similar, borne singly; Compression, unremarkable; Disarticulation, above the glumes; Glumes, lower, 23-34 mm., veins #3, upper, 23-29 mm., veins #5, awl-shaped, rounded, membranous, ±equal, tip, very narrow, not awned; Florets, 1 per spikelet; Callus, 4.5-50 mm., sharp, straight hairs 1.0-1.5 mm., color tan; Lemma, 9.5-10.0 mm., rolled, indurate, straight hairy 0.5 mm., color white-tan, veins #3(?), awns, #1, 125-160 mm., twisted and short straight hairy proximal 45 mm., bent, scabrous distally; Palea, 9 mm., ±lemma, few white hairs on mid-vein; Stamens, #3; Anthers, 6.5 mm. (Described from Coll. No. 1890, 28 May 2018).
- Clear Creek Canyon Park -- Wildflower Walk,
6179.
6/3/2026.
.
.
 Coll. No. 992, Stipa comata var. comata |
 Coll. No. 1929, Hesperostipa comata |
 Florets of Coll. No. 1890, Hesperostipa comata |
Pseudoroegneria spicata (Pursh) A. Löve. (Syn: Elymus spicatus (Pursh) Gould ) Bluebunch Wheat Grass. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.
Perennial grass, to 40 cm., rhizomatous, glabrous throughout; Inflorescence, 2-sided spike; Spikelets, 1 per node, flatside to rachis, sessile, overlap 28%; Disarticulation, above the glumes; Glumes, lanceolate, rolled, lower glume, 8 mm., veins 3 (not symmetric), short tip, upper glume, 9 mm., veins 4 (visible, not symmetric) awn 1 mm.; Lemma 10 mm., veins 5, awn 10 mm. divergent when dry; Palea, 9 mm. (Coll. No. 3458.1, 21 July 2025)
- Clear Creek Canyon Park -- Wildflower Walk, iNaturalist Observation 279485759. carolinetrotter 5507. 5/7/2025. .
| Total number of taxa: | 77 |
| Native Taxa: (serif, italic, bold) | 63 |
| Exotic Taxa: (sans-serif, italic) | 14 |
| Nativity Undetermined: (default font, italic) | 0 |
| Listed Weeds: Identified as Weed | 6 |
Notes:
† -- Data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/consortium/).
‡ -- Southwest Environmental Information Network, SEINet. 2009-2014. http//:swbiodiversity.org/seinet/index.php. Accessed from July 2009 to September 2014.
Locations Included in This Area
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Date and time this article was prepared: 8/1/2026 3:21:18 PM.
