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Detailed Area Plant List for Coors Tech Wetland Open Space, Jefferson County, United States.
Edited by Tom Schweich
This list is assembled from personal collections, herbarium vouchers, and published lists that were available at the time this list was prepared. There may be additional species of plants in this area that were unknown or undocumented at the time this list was prepared. 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 Coors Tech Wetland Open Space, Jefferson County, United States.
Anacardiaceae
Rhus glabra L. Smooth Sumac. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space,
6000.
5/11/2026.
.
 Last year's fruit on Rhus glabra |
 Coll. No. 2556, Rhus glabra. |
Asclepiadaceae
Asclepias speciosa Torr. Showy Milkweed. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space,
5968.
5/11/2026.
5995.
5/11/2026.
.
 Showy Milkweed (Asclepias speciosa). |
 Seed pod of Asclepias speciosa |
 Seed of Asclepias speciosa |
Asteraceae
Cirsium arvense (L.) Scop. (Syn: Breea arvensis (L.) Lessing ) Canada Thistle. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual, to 70 cm., tap-rooted; Leaves, cauline, alternate, sessile but not obviously decurrent, 85 mm. × 20 mm. wide, margin sinuate, spiny, adaxial thinly tomentose, abaxial tomentose; Inflorescence, panicle(?); Heads, many, 30±, 15 mm. × 8 mm. dia., disk flowers only, dioecious, staminate heads, pappus < corolla, pistillate heads, pappus > corolla; Phyllaries, many (6-7) series, outer 3 mm. × 1.5 mm. wide, inner 15 mm. × 1 mm. wide, dark dorsal ridge, tips, spinulose, reflexed; Receptacle, soft bristles, 10 mm.; Pappus, plumose bristles (Described from Coll. No. 1512, 24 July 2016).
- Coors Tech Wetland Open Space,
5975.
5/11/2026.
.
.
 Coll. No. 1200, Cirsium arvense |
 Coll. No. 3210, Cirsium arvense. |
 Coll. No. 1512, Cirsium arvense |
 Coll. No. 2773, Cirsium arvense |
Ericameria nauseosa (Pall. ex Pursh) G.L.Nesom & G.I.Baird var. graveolens (Nutt.) Reveal & Schuyler. (Syn: E. n. (Pall. ex Pursh) G.L.Nesom & G.I.Baird var. glabrata (Gray) G.L. Nesom & Baird ) Goldy-Locks. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space,
5974.
5/11/2026.
6001.
5/11/2026.
.
.
Erigeron divergens Torr. & A. Gray. Spreading Fleabane. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual or short-lived perennial, to 15 cm., tap-rooted, ±spreading hairy throughout, becoming minutely glandular above, hairs multicellular with clear crosswalls; Leaves, basal, absent or withered; cauline, alternate, petiole ±10 mm. + blade ±12 mm. × 2.4 mm. wide, uniformly hairy, somewhat reduced above; Inflorescence, heads borne singly on leafy stems, peduncles spreading or decurved, but cannot be described as “heads nodding;” Involucre, 3 mm. × limb 12 mm.; Receptacle, epaleate; Flowers, 2 kinds; Rays, corolla, 3.5 mm., white fading blue; Disk flowers, corolla, 1.7 mm., yellow; Pappus, short scales and longer capillary bristles, similar on ray and disk flowers; Cypsela, 0.8 mm. (Described from Coll. No. 1489. 13 July 2016. See also Coll. No. 3381).
- Coors Tech Wetland Open Space,
5970.
5/11/2026.
.
.
Gaillardia aristata Pursh. Blanketflower. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 40 cm.; Leaves, alternate, entire to toothed; Inflorescence, single heads on peduncles 13-18 cm., flowers of 2 kinds; Phyllaries, 2+ series, 17 mm. × 2.7 mm. wide, lance-linear; Receptacle, epaleate, setae, to 10 mm.; Rays, sterile, corolla, 21 mm. × 10 mm. wide, yellow, deeply 3-lobed; Disk flowers, corolla, 7 mm., purple; Pappus of 6+ aristate scales, 4 mm., awn 2×> body. Described from Coll. No. 1205, 12 Jul 2015.
- Coors Tech Wetland Open Space,
5992.
5/11/2026.
.
.
 Gaillardia aristata on Dakota Ridge. |
 Coll. No. 1665, Gaillardia aristata |
 Flowerhead of Coll. No. 1454, Gaillardia aristata |
Onopordum acanthium L. Scotch Cottonthistle. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space,
5983.
5/11/2026.
.
.
 Coll. No. 2772, Onopordum acanthium |
Scorzonera laciniata L. (Syn: Podospermum laciniatum (L.) De Candolle ) Cutleaf Vipergrass. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 40 cm., Leaves, basal and cauline, 7-20 cm., pinnately dissected into near-linear lobes, reduced but still well-developed above; Inflorescence, few heads on long stems; Phyllaries, in ±3 series, graduated, 4-13 mm. × 1.5-9 mm. wide, margins chartaceous, tips dark; Receptacle, epaleate; Flowers, ligulate (1 kind, 5-lobed), corolla yellow; Pappus of plumose bristles, Introduced, Europe (Old French: viper) (Described from Coll. No. 1399, 8 June 2016).
- Coors Tech Wetland Open Space,
5979.
5/11/2026.
.
.
 Schweich collection of Scorzonera laciniata |
Senecio L. Ragwort. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space, 5981. 5/11/2026. . .
Taraxacum officinale F. H. Wigg. (Syn: T. laevigatum (Willd.) DC. ) Common Dandelion. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space,
5973.
5/11/2026.
.
.
Tragopogon dubius Scop. (Syn: Tragopogon dubius Scop. ssp. major (Jacq.) Vollman ) Yellow Salsify. CalPhotos. Jepson eFlora. SEINet Taxon.
Peduncle inflated distally, flowers yellow, phyllaries in 1 overlapping series, ligules 3-5 mm. shorter than phyllaries.
- Coors Tech Wetland Open Space,
5977.
5/11/2026.
.
 Coll. No. 1115, Tragopogon dubius |
Brassicaceae
Alyssum simplex Rudolphi. (Syn: A. campestre (L.) L. var. simplex (Rudolphi) Willd. , A. minus Rothm. , A. parviflorum Fisch. ex M.Bieb. ) European Madwort. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual, tap-rooted, to 12-30 cm., stellate hairy throughout (typically doubly branched and 8-pointed); Stem branched at base, ascending; Leaves basal, withered at flowering, appear compound, cauline, alternate, 14-28 mm. × 3.5-5.0 mm., oblanceolate, margin entire, tip acute, sessile or vaguely short-petioled; Inflorescence not bracted; Pedicels, in fruit, 4.5 mm.; Sepals, 4, 2 mm. × 0.7 mm. wide, deciduous in fruit; Petals 2.9-3.0 mm., yellow fading white,clawed, entire to tip slightly notched; Stamens, 2.5-2.6 mm.; Filaments, 2.3 mm., winged proximal 1.5-1.8 mm., not toothed; Style persistent, 1.3 mm., few hairs at base; Fruit round, 3.5-5.0 mm. × 5.6 mm. wide, margin entire, compressed parallel to the replum, hairy, hairs thinning as fruit matures; Ovules, 4 (most keys and descriptions say 2 when they give a specific number, but the genus is described as having 1-2[4] ovules). (Described from Clyde Golden, 25 Jun 2011, Coll. No. 1090, 30 Apr 2015, and Coll. No. 1367, 24 May 2016).
- Coors Tech Wetland Open Space,
5976.
5/11/2026.
.
.
 Alyssum simplex |
 Alyssum simplex |
 Fruit of Coll. No. 1090, Alyssum simplex |
 Coll. No. 1090, Alyssum simplex |
 Coll. No. 1367, Alyssum simplex |
Thlaspi arvense L. Field Penny Cress. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual, tap-rooted, to 50 cm., generally glabrous throughout; Stem, single, or few-branched proximally; Leaves, basal and cauline, basal, withered at flowering, cauline, sessile, auriculate, oblong, 30 mm. × 5-9 mm. wide, reduced distally, dentate; Inflorescence, raceme; Sepals, 2 mm. × 1 mm. wide, ovate; Petals, 3-3.5 mm. × 1 mm. wide, spoon-shaped, margin entire, white; Stamens, 2 mm.; Anthers, 0.5 mm.; Fruit, pedicels 10-15 mm., ascending to spreading, glabrous, fruit obovate, 10 mm. × 8 mm., wide, margin winged, tip notched 1 mm.; Ovules, biseriate, #many (Described from Coll. No. 1324, 4 May 2016).
- Coors Tech Wetland Open Space,
5987.
5/11/2026.
.
 Brassicaceae Thlaspi arvense |
 Habitat of Coll. No. 1365, Thlaspi arvense |
 Coll. No. 1365, Thlaspi arvense |
 Coarsely dentate leaves of Coll. No. 1820, Thlaspi arvense |
Elaeagnaceae
Elaeagnus angustifolia L. Russian Olive. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space,
5980.
5/11/2026.
.
 Russian Olive (Elaeagnus angustifolia) on the other side of the trail. |
 Coll. No. 1645, Elaeagnus angustifolia |
 Coll. No. 1437, Elaeagnus angustifolia |
Fabaceae
Medicago sativa L. Alfalfa. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space, 5965. 5/11/2026. 5967. 5/11/2026. . .
Melilotus officinalis (L.) Lam. Yellow Sweet Clover. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space,
5994.
5/11/2026.
.
.
 Inflorescence of Coll. No. 1687, Melilotus officinalis |
Trifolium repens L. White Clover. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space,
5985.
5/11/2026.
.
 Coll. No. 2143, Trifolium repens |
 Coll. No. 2705, Trifolium repens |
 Head of Coll. No. 2143, Trifolium repens |
 Coll. No. 2705, Trifolium repens |
Grossulariaceae
Ribes aureum Pursh. Golden Currant. CalPhotos. Jepson eFlora. SEINet Taxon.
Coll. No. 1319, 4 May 2016: Perennial shrub, to 1 m.; Stem, unarmed; Leaves, fascicled, broadly ovate, 29 mm. × 22 mm. wide, lobes 3, obtuse; Hypanthium, 9 mm., bright yellow; Sepals, petaloid, 5 mm.; Petals, 2.5 mm.; Ovary, 2 mm.
- Coors Tech Wetland Open Space,
5997.
5/11/2026.
.
.
 Habitat of Coll. No. 1834, Ribes aureum. |
 Grossulariaceae Ribes aureum |
 Grossulariaceae Ribes aureum |
 Ribes aureum in winter. |
 Twigs of Ribes aureum in winter. |
 Coll. No. 1834, Ribes aureum. |
Ribes cereum Douglas. Wax Currant. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space,
5972.
5/11/2026.
.
 Developing fruit on Ribes cereum. |
 Coll. No. 1091, Rubus deliciosus |
 Coll. No. 1092, Ribes cereum |
Linaceae
Linum lewisii Pursh. (Syn: Adenolinum lewisii (Pursh) A. Löve & D. Löve ) Prairie Blue Flax. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space,
5978.
5/11/2026.
.
 Coll. No. 3119, Linum perenne. |
 Coll. No. 823, Linum lewisii |
 Coll. No. 1383, Linum perenne |
 Inflorescence of Coll. No. 1951, Linum lewisii |
Onagraceae
Oenothera L. Evening Primrose. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space, 5963. 5/11/2026. .
Polygonaceae
Rumex crispus L. Curley Dock. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space,
5961.
5/11/2026.
.
 Coll. No. 2817, Rumex crispus |
 Coll. No. 818, Rumex crispus |
Rhamnaceae
Rhamnus cathartica L. European Buckthorn. Weed: CO DofA, List: Unlisted. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space,
5982.
5/11/2026.
.
Rosaceae
Prunus americana Marshall. American Plum. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial woody shrub, spreading, to 2 m., blooming before leafing out; Branches, unarmed, glabrous when young, peeling to brown; Leaves, (immature, at time of flowering), simple, 15-19 mm. × 5.5-8 mm. wide, lanceolate or elliptic-rhomboid, pinnately veined, glabrous, margin toothed, teeth eglandular, base slightly hairy, petiole 3 mm., adaxially hairy; Flowers, in small groups of 2-3; Pedicels, 9-18 mm., glabrous to sparsely hairy; Hypanthium, 2 mm.; Sepals, 2.5-2.8 mm., reflexed, few cobwebby hairs adaxially; Petals, free, white, 5-7 mm. × 2.5-4.5 mm. wide; Stamens, many (30?); Ovary superior; Styles #1, 10 mm.; Fruit unknown (Described from Coll. No. 1093, 30 Apr 2015, and Coll. No. 1819, 16 May 2018).
- Coors Tech Wetland Open Space,
5993.
5/11/2026.
.
.
Rosa . Horticultural Rose. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space, horticultural rose 5990. 5/11/2026. .
Salicaceae
Populus deltoides Marshall ssp. monilifera (Aiton) Eckenw. (Syn: Populus sargentii Dode ) Plains Cottonwood. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space,
5966.
5/11/2026.
.
.
Salix amygdaloides Andersson. Peachleaf Willow. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial tree, Twigs, young, dark brown; Leaves, alternate, petiole, 10-12 mm., tuft of hairs adaxially, glands absent at base of leaf, blade, 80 mm. × 26 mm. wide, 3.08 × long as wide, young leaves have slightly tangled white hairs both sides, mature leaves, green adaxially, glaucus abaxially, margin, serrate, tip, acuminate; Staminate catkins (aments), peduncle, 12 mm., spike, 47 mm. × 9 mm. wide, stamens, #4-5, 4.5 mm.; Pistillate catkins, absent. (Described from Coll. No. 1886, 28 May 2018.)
- Coors Tech Wetland Open Space,
5971.
5/11/2026.
.
.
 Salix amygdaloides (Coll. No. 1886) with Cottonwood in southern Survey Fields. |
 Coll. No. 1886, Salix amygdaloides |
Salix exigua Nutt. Coyote Willow, Narrow-Leaved Willow. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial erect shrub, to 2 m.; Leaves, alternate, 21 mm. ×. 1.8 mm. wide, 11.7 ×long as wide, abaxial villous, adaxial mostly glabrous, margins entire, slightly revolute; Staminate catkins, 30 mm. × 6 mm. wide; Pistillate catkins, 42 mm. × 4 mm. wide, floral bract, 1.8 mm., capsule, 2.6 mm., glabrous (Described from Coll. No. 1880, 24 May 2018).
- Coors Tech Wetland Open Space,
5960.
5/11/2026.
.
 Pistillate catkin of Coll. No. 1880, Salix exigua |
 Staminate catkin of Coll. No. 1880, Salix exigua |
Scrophulariaceae
Verbascum thapsus L. Common Mullein. Weed: CO DofA, List: C. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space,
5996.
5/11/2026.
5999.
5/11/2026.
.
 Package of Mullein in the Pharmacy at Fort Hartsuff. |
 Dense colonies of Common Mullein (Verbascum thapsus) in Cottonwood Canyon |
 Collection No. 512, Verbascum thapsus |
Cyperaceae
Carex pellita Muhl. ex Willd. (Syn: Carex lanuginosa Michx. ) Wooly Sedge. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space,
5989.
5/11/2026.
.
.
 Observation of Carex pellita |
Eleocharis acicularis (L.) Roem. & Schult. Needle Spikerush. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space,
5984.
5/11/2026.
.
 Habitat of Coll. No. 1832, Eleocharis cf. acicularis |
 Coll. No. 1832, Eleocharis cf. acicularis |
 Coll. No. 1832, Eleocharis cf. acicularis |
Juncaceae
Juncus L. Rush. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space,
5969.
5/11/2026.
no inflorescence seen
5986.
5/11/2026.
.
 Coll. No. 1274, Juncus |
Poaceae
Bromus inermis Leyss. (Syn: B. inermis Leyss. ssp. inermis ) Smooth Brome. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial grass to 1 m., rhizomatous; Leaves, sheath, 8-11 cm., closed, ligule, <1 mm., membraneous, blade, 12-17 cm × 0.5 cm., flat, soft, with a distinguishing fold, usually described as an “M” or a “W” that is difficult to see when dry; Inflorescence, panicle, 15 cm. × 4 cm. wide, multiple 1° branches per node, mostly on one side of rachis; Spikelets, 1 per node on 1° and 2° panicle branches, 15-24 mm. × 5 mm. wide, laterally compressed, 2-6 florets per spikelet; Glumes, 2, keeled, glabrous, lower, 7-8 mm., veins 1 upper, 8-10 mm., <lowest floret; Rachilla, sparsely hairy on abaxial side, extended beyond uppermost floret or not; Callus, small, glabrous; Lemma, 11-12 mm., veins, 3, 5, 7, obvious, tip bifid, some awned; Awn (when present), 1.0-1.6 mm., arising near tip of lemma; Palea, 9 mm., veins ciliate. (Described from Coll. No. 1113, 26 May 2014, and Coll. No. 1219, 16 Jul 2015).
- Coors Tech Wetland Open Space,
5964.
5/11/2026.
.
.
Bromus tectorum L. (Syn: B. tectorum L. var. glabratus Spenn. ) Cheat Grass. Weed: CO DofA, List: C. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual grass, to 30 cm.; Leaves, Sheath, 50 mm., closed proximal ⅔, open distally, Ligule, membraneous, 1 mm.; Blade, 60 mm.; Inflorescence, open panicle, rachis and pedicels short hairy, Spikelets, 1 per node, 15 mm., laterally compressed; Glumes, 2, sparsely hairy, margins scarious, lower, 2.3 mm., veins indistinct, upper, 4.5 mm. Callus, glabrous, very short, Florets, ±6, Lemma, 6.5 mm., 0.7 from mid-vein to margin, back rounded, sparsely hairy, tip, forked, teeth 1 mm., awned from near tip, awn, 5-7 mm.; Anthers, 3, 0.4 mm. Described from Coll. No. 1112, 26 May 2015. Dimensions are small for B. tectorum, perhaps because of the early date of collection.
- Coors Tech Wetland Open Space,
5998.
5/11/2026.
.
.
 Coll. No. 1112, Bromus tectorum |
Dactylis glomerata L. Orchard Grass. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial grass, to 1.0-1.2 m.,
not rhizomatous,
basal or subterranean internodes not swollen;
Stem herbaceous;
Leaf,
Sheath open and closed observed, published descriptions are roughly equally divided as to whether the sheath is open or closed,
Ligule membraneous, 5 mm.;
Blade, differentiated from sheath, base not constricted, soft,
25 cm. × 0.7 cm. wide, not sharp-pointed;
Auricle, rounded, <1 mm., generally described as 0;
Infloresence exceeding leaves, 13 cm., panicle, well developed, erect, 1° branches open, branching 4° or 5°;
Spikelets not enclosed in a bur-like involucre,
not subtended by bristles or long silky hairs,
similar throughout plant,
all on one side of rachis,
crowded in dense clusters,
on 2°-4° panicle branches
1 per node,
axis few hairy,
some spikelets appear to be infertile;
Glumes, 2
< lowest floret,
lower, 3.5 mm, smaller and thinner than
upper, 6 mm.,
keeled,
glabrous to ciliate on keel, else sparsely hairy;
Florets
not modified into bulblets
4+ per spikelet ,
have feathery stigma-like material but no ovary (immature?),
uppermost vestigal floret not club-shaped rudiment (as seen in Melica);
Lemma
lowest largest, 5 mm., reduced above,
keeled, line of hairs on keel,
5 veins,
tip forked,
awn 1.0-1.5 mm.;
Palea
light green
with 2 veins
forked at tip.
Described from Collection No. 815, 9 May 2012, Alameda County, CA and
Coll. No. 1111, 26 May 2015, Jefferson County, CO.
- Coors Tech Wetland Open Space,
5991.
5/11/2026.
.
.
Festuca ovina L. Complex, hybrid or selection. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space, 5988. 5/11/2026. .
Typhaceae
Typha latifolia L. Cattail. CalPhotos. Jepson eFlora. SEINet Taxon.
- Coors Tech Wetland Open Space, 5962. 5/11/2026. .
| Total number of taxa: | 37 |
| Native Taxa: (serif, italic, bold) | 15 |
| Non-native Taxa: (sans-serif, italic) | 19 |
| Nativity Undetermined: (default font, italic) | 3 |
| 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: 11/3/2026 12:18:24 PM.
