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 Golden, Jefferson County, United States.

Bryophyta

Bryophyte .  CalPhotos. Jepson eFlora. SEINet Taxon.

- Schweich Hill, Deferred. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue. 2.3 km. northwest of GNIS location of Golden. Upper slope of cut bank, north side of open space. Tom Schweich 2014. 16 Apr 2019. ( KHD ^‡ ) .

Azollaceae

Sometimes placed in Salviniaceae.

Azolla mexicana C. Presl.  Mexican Mosquito Fern. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Golden, Under willows, slow moving water from leaking reservoir above. West of McIntyre Bridge on Hwy 58 from Denver to Golden. North side of road right past westbound on-ramp from McIntyre Bridge. UTM: 13 E0484530 N4402533. Scott Smith 1 Sep 2008. ( COLO00941484^‡ ) .

Dryopteridaceae

Cystopteris fragilis (L.) Bernh.  Brittle Bladderfern. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Plants, terrestrial, to 35 cm.; Fronds, petiole scales very sparse, widest at middle, bipinnately compound + lobed, abaxial surface glabrous, margins flat; Sori, between midrib and leaflet margin, round, indusium hood-like at base then divided into filiform segments. (Described from Coll. No. 2890, 20 July 2022.)

- Lookout Mountain, On dry soil banks in ponderosa pine-douglas fir ravine. Ralph Cannon ranch, Lookout Mountain. Hansford T. Shacklette 5924. 4 Jul 1959. ( COLO00861963^‡ ) Rocky situations. Lookout Mountain. 13N 0479600E 4397885N. Unknown 1 Sep 1917. ( KHD4948^‡ ) .

- North Table Mountain Park, East-facing rock crevices. Rim of mesa, head of unnamed canyon draining southeast to Clear Creek, 1.8 km. north northeast of the GNIS location of Golden. Tom Schweich, with Greg McKittrick 1447.1 22 Jun 2016. ( JCOS s.n. ) .

- South Table Mountain, In wet moss and rock crevices A lava capped mesa in the Denver Formation. frequent, S. Table Mt., a lava capped mesa. At head of W fork of 1st N facing gully E of Castle Rock. 13N 0483140E 4400820N. Loraine Yeatts 2392. 13 May 1987. ( COLO 00945303^‡ KHD24507^‡ ) . .

Woodsia oregana D.C. Eaton ssp. cathcartiana (B.L. Rob.) Windham.  Rocky Mountain Woodsia. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Of the three characters that distinguish subsp. cathcartiana from subsp. oregana, two, spore size and adaxial epidermal cell size, require measuring in units of µm, something outside the usual abilities of the field botanist. The third character, regarding the cells on pinnule margins being irregular in shape making the margins appear ragged, can be seen with a good microscope.

- Apex Park - Northern Parcel, Steep, damp north-facing slope, in rocks under Ribes cereum, Prunus virginiana, and Amelanchier alnifolia. 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. Tom Schweich 2555. 7 Jul 2021. ( COLO2706638^‡ ) .

- North Table Mountain, as Woodsia oregana 1389. 1389. White, Sally, and Loraine Yeatts, 1994 .

- North Table Mountain Park, Under an east-facing rock overhang. 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. Tom Schweich 1343. 12 May 2016. ( JCOS s.n. KHD00063429^‡ ) 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. Tom Schweich 1734. 15 Aug 2017. ( KHD00065322^‡ ) East-facing rock crevices. Rim of mesa, head of unnamed canyon draining southeast to Clear Creek, 1.8 km. north northeast of the GNIS location of Golden. Tom Schweich, with Greg McKittrick 1447. 22 Jun 2016. .

- South Table Mountain, Growing under rock, SW facing gully. South Table Mountain. 13N 0482600E 4400600N. Janet L. Wingate 2370. 1 Jun 1983. ( KHD13185^‡ ) Overhanging ledge of volcanic rock near drainage on W. side of mesa. S. Table Mt, UTM coord. 822004. 13N 0482200E 4400400N. Mary E. Edwards 430. 1 Jun 1983. ( KHD20849^‡ ) .

Equisetaceae

Equisetum hyemale L. ssp. affine (Engelm.) Calder & Roy L.Taylor.  Tall Scouring Rush. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- North Table Mountain, as Hippochaete h. 1063. 1063. Zeise, Larry Steven, 1976 . .

Equisetum laevigatum A. Braun.  Smooth Horsetail. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

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

Pteridaceae

Argyrochosma fendleri (Kunze) Windham.  Fendler's False Cloak Fern. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Golden, Habitat: quartzite sandstone rocks United States, Colorado, Jefferson, on Table-Top Mountain, near Golden Warren H. Wagner, Jr. 30 Aug 1944. ( PH720360^‡ ) .

- South Table Mountain, Front Range, South Table Mountain, a lava capped mesa in the Denver Formation, 1st major N facing gully E. of Castle Rock. 13N 0483130E 4399950N. Loraine Yeatts 1457. 4 Jun 1987. ( KHD25152^‡ ) . .

Cheilanthes feei T. Moore.  Slender Lipfern. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- South Table Mountain, a lava capped mesa in the Denver formation; in crevices on N. facing vertical, barren, 50 ft. cliff face. Front Range, S. Table Mt., a lava capped mesa in the Denver formation; UTM coord. 8323E0100N. 13N 0483230E 4401000N. Loraine Yeatts 2392. 18 Jun 1990. ( COLO00677385^‡ KHD28291^‡ ) .

Selaginellaceae

Selaginella densa Rydb.  Rocky Mountain Spikemoss. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- North Table Mountain, 1124. 1124. Zeise, Larry Steven, 1976 1193. 1193. Kilburn, Paul D., and Sally L. White, 1992 . .

Selaginella underwoodii Hieron.  Underwood's Spikemoss. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- North Table Mountain, 1194. 1194. Kilburn, Paul D., and Sally L. White, 1992 .

- South Table Mountain, S Table Mountain, in 2nd stream gully N of quarry on N facing rocks; UTM coord. 840006. 13N 0484000E 4400600N. Peter G. Root 854. 9 May 1985. ( KHD22019^‡ ) .

Cupressaceae

Juniperus L.  Juniper. CalPhotos. Jepson eFlora. SEINet Taxon.

- Golden History Park, horticultural juniper Tom Schweich 2969. 4/25/2023. .

- 407 Garden Street, horticultural juniper Tom Schweich, with Cathy Hansen-Stamp 2627. 5/16/2022. . .

Juniperus communis L. var. depressa Pursh.  Common Juniper. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora. J. communis L. ssp. alpina (Smith) Celak., in Weber & Wittmann (2012) misapplied.

- Colorado School of Mines Survey Field, Shoulder of small gulch. 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. Tom Schweich 1606. 13 May 2017. ( CDA0050060^‡ COLO2299782^‡ KHD00065345^‡ ) .

- Eagle Ridge, at the north base of Eagle Ridge Tom Schweich 2002. 8/28/2020. .

- Golden, S. M. Tracy, with Evans 22 Sep 1887. ( NY21399^‡ ) .

- Stonebridge Homeowners Association, Tom Schweich 3242. 6/13/2023. .

- 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. Tom Schweich 1361. 21 May 2016. ( JCOS s.n. KHD00063425^‡ UCR277972^‡ ) .

- Windy Saddle Park, Tom Schweich, with Cindy Trujillo 2646. 5/17/2022. . .

Juniperus scopulorum Sarg.  (Syn: Sabina scopulorum Sarg.(Sarg.) Rydb. ) Rocky Mountain Juniper. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Apex Park - Northern Parcel, Tom Schweich 1808. 4/21/2020. Mostly foothills shrubland with a few junipers, also collected nearby: Mirabilis linearis, Ranunculus glaberrimus, Grindelia squarrosa, and Andropogon gerardii. 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. Tom Schweich 2382. 17 Jul 2020. ( CAS CDA0053761^‡ COLO2434421^‡ CS198705^‡ ) .

- Colorado School of Mines Survey Field, Tom Schweich 2526. 4/29/2022. .

- Dakota Ridge, Tom Schweich 1735. 6/14/2019. .

- Golden, Golden. S. M. Tracy, with Evans 881. 22 Sep 1887. ( NY18159^‡ ) .

- 407 Garden Street, Tom Schweich, with Cathy Hansen-Stamp 2628. 5/16/2022. .

- Heritage Square, Rocky hillside. 2 1/2 mi S of Golden. T R70W S10 Ernest H. Brunquist 60. 23 Sep 1959. ( CS37482^‡ ) .

- Magic Mountain, Tom Schweich 1656. 4/18/2018. .

- Magpie Gulch, Tom Schweich, with Cindy Trujillo 3074. 5/22/2023. Tom Schweich, with Cindy Trujillo 3199. 5/31/2023. .

- North Table Mountain, 1067. 1067. Zeise, Larry Steven, 1976 1364. 1364. Kilburn, Paul D., and Sally L. White, 1992 .

- South Table Mountain, Front Range, South Table Mountian, a lava capped mesa in the Denver Formation; clay substrate. 7.5'Golden; 1st major N facing gully E of Castle Rock; near head of dry W fork of gully. 13N 0483170E 4400845N. Loraine Yeatts 1558. 12 Oct 1987. ( COLO 00808642^‡ KHD25155^‡ ) .

- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2298. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 .

- Windy Saddle Park, Several trees on the edge of a rocky ridge. 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. Tom Schweich 1244. 24 Jul 2015. ( JCOS s.n. KHD00060587^‡ OBI83210^‡ UC UCR267461^‡ ) Tom Schweich, with Cindy Trujillo 2645. 5/17/2022. . .

Juniperus virginiana L.  Eastern Redcedar. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Tall narrow shrub, to 2 m.; Leaves in 2s, scale-like, margin entire, tip acute, overlapping > ¼ length of next leaf, length of gland < distance to apex; Seed, #1, 4 mm. × 3 mm.

- Kinney Run, Tom Schweich 1627. 7/6/2018. .

- Schweich Hill, Probable garden escapee. On a cut bank near the north boundary fence of the Upper Washington Avenue Open Space, 1.8 km northwest of the GNIS location of Golden. Tom Schweich 1775. 11 Apr 2018. ( CS198647^‡ KHD00069179^‡ ) .

Pinaceae

Picea pungens Engelm.  Colorado Blue Spruce. CalPhotos. Jepson eFlora. SEINet Taxon.

- Golden History Park, Tom Schweich 2998. 4/25/2023. . .

Pinus contorta Douglas ex Loud. var. latifolia Engelm.  Lodgepole Pine. CalPhotos. Jepson eFlora. SEINet Taxon.

- Golden History Park, 2 needles, 1 1/4 " long, no cones. Tom Schweich 3027. 5/5/2023. . .

Pinus edulis Engelm.  Pinyon Pine. CalPhotos. Jepson eFlora. SEINet Taxon.

- Golden History Park, 2-3 needles Tom Schweich 2975. 4/25/2023. Tom Schweich 3025. 5/5/2023. .

- 407 Garden Street, Tom Schweich, with Cathy Hansen-Stamp 2630. 5/16/2022. .

- South Illinois Open Space, 3937. 12/20/2024. . .

Pinus ponderosa Laws.  Ponderosa Pine. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Apex Gulch, Beside trail, in gulch. Tom Schweich, with Cindy Trujillo 2407. 8/25/2021. .

- Apex Park - Northern Parcel, Tom Schweich 1809. 4/21/2020. .

- Colorado School of Mines Survey Field, Tom Schweich 2525. 4/29/2022. .

- Dakota Ridge, Tom Schweich 1734. 6/14/2019. .

- Golden History Park, Tom Schweich 2974. 4/25/2023. Tom Schweich 3026. 5/5/2023. .

- 407 Garden Street, Tom Schweich, with Cathy Hansen-Stamp 2629. 5/16/2022. .

- Magic Mountain, Tom Schweich 1655. 4/18/2018. .

- Magpie Gulch, Tom Schweich, with Cindy Trujillo 3126. 5/22/2023. .

- North Table Mountain, 1096. 1096. Zeise, Larry Steven, 1976 1365. 1365. Kilburn, Paul D., and Sally L. White, 1992 1384. 1384. White, Sally, and Loraine Yeatts, 1994 .

- North Table Mountain Park, Tom Schweich 1476. 7/13/2016. .

- Tin Cup Ridge, Chopped down, presumably to clear the trail. Tom Schweich 1493. 3/20/2017. .

- Windy Saddle Park, Tom Schweich 1827. 5/4/2020. . .

Bracts spreading, often reflexed; seed cones 4-7 cm; leaves bluish green to dark green or gray-green; Rocky Mountain region.

… P. menziesii (Mirb.) Franco var. glauca (Beissn.) Franco

Pseudotsuga menziesii (Mirb.) Franco.  Douglas Fir. CalPhotos. Jepson eFlora. SEINet Taxon.

- Magpie Gulch, Tom Schweich, with Cindy Trujillo 3093. 5/22/2023. . .

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. Douglas Fir in Colorado is treated as var. glauca.

- Apex Park - Northern Parcel, South bank of the gulch, mid-slope, one of the trees at lower elevation on this gulch. Tom Schweich, with Cindy Trujillo 2418. 9/1/2021. .

- Lookout Mountain, Lookout Mountain. 13N 0479612E 4398000N. Unknown 1 Jun 1913. ( KHD5797^‡ ) .

- North Table Mountain, 1108. 1108. Zeise, Larry Steven, 1976 .

- North Table Mountain Park, In brush on moderate northwest slope, only such tree seen. 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. Tom Schweich 1502. 13 Jul 2016. ( JCOS s.n. KHD00063565^‡ ) .

- Windy Saddle Park, assumed to be var. glauca Tom Schweich 1828. 5/4/2020. Tom Schweich, with Cindy Trujillo 2640. 5/17/2022. .

Adoxaceae

Not published in FNANM. Formerly placed in in Caprifoliaceae (incl. W&W) and sometimes in its own family, Sambucaceae (Snow, 2009). Placed in Adoxaceae by the Plant List (2014) and TJM2 (2012).

Sambucus canadensis L.  American Black Elderberry. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Clear Creek, William Huestis 26 Jul 1916. ( COLO00222687^‡ ) .

- Golden, Roadside. Roadside 58 east of Golden. J. H. Ehlers 8462. 27 Jul 1942. ( COLO00222695^‡ VDB81430^‡ ) .

Amaranthaceae

Amaranthus .  Pigweed. CalPhotos. Jepson eFlora. SEINet Taxon.

- North Table Mountain Park, Golden, Table Mountain Ranch at NW corner of North Table Mountain. Near main entrance road. 13N 0481966E 4404968N. Janet L. Wingate 1309. 18 Oct 1981. ( KHD6692^‡ ) . .

Amaranthus albus L.  Tumble Pigweed. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Golden, Common adventive garden weed. Yard at 900 5th Street, cross street Arapahoe St., 0.83 km. northwest of the GNIS location of Golden. Tom Schweich 3045. 4 Jul 2023. ( KHD ^‡ ) .

- Golden History Park, Tom Schweich 3390. 8/29/2023. .

- South Table Mountain, Bare clay soil of mesatop. Lava capped mesa. Jefferson County, Colorado, USA. S. Table Mt., a lava capped mesa in the Denver Formation. UTM: 836003. Loraine Yeatts, with V. Richards 1088. 18 Sep 1984. ( COLO00005165^‡ ) . .

Amaranthus arenicola I. M. Johnst.  Sandhill Pigweed. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- North Table Mountain Park, Golden, Table Mountain Ranch at NW corner of North Table Mountain. Near main entrance road. 13N 0481966E 4404968N Janet L. Wingate 1188. 13 Sep 1981. ( COLO00005405^‡ KHD6691^‡ ) . .

Amaranthus blitoides S. Watson.  (Syn: A. graecizans L. ) Mat Amaranth. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Golden History Park, Tom Schweich 3391. 8/29/2023. .

- Heritage Square, Open disturbed ground. Ca 2 1/2 mi S of Golden Ernest H. Brunquist 64. 23 Sep 1959. ( CS37485^‡ ) .

- South Table Mountain, S. Table Mt. In center of hardpacked road to Castle Rock. 13N 0482800E 4400400N. Loraine Yeatts 812. 29 Aug 1983. ( COLO00005694^‡ KHD18902^‡ ) . .

Amaranthus powellii S. Watson.  Powell's Pigweed. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Heritage Square, Open disturbed dry part of creekbed Ca 2 1/2 mi S of Golden. T R70W S10. Ernest H. Brunquist 63. 23 Sep 1959. ( CS37484^‡ ) .

- South Table Mountain, abundant & widespread, S. Table Mountain. Common along Quaker Rd. near mesa top. 13N 0484300E 4399500N. Loraine Yeatts 825. 29 Aug 1983. ( COLO00006098^‡ KHD18903^‡ ) . .

Froelichia gracilis (Hook.) Moq.  Slender Snakecotton. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Golden, Ca 2 1/2 mi S of Golden Ernest H. Brunquist 25. 17 Aug 1959. ( CS23911^‡ KHD727^‡ ) Roadside at junction of Highway 6 and Highway 58, west of Golden. 13N 0479810E 4400391N. Janet L. Wingate 1187. 12 Sep 1981. ( KHD124^‡ ) .

- Welch Ditch, Upper side of flume only, not seen below. Only plant growing here. Mouth of Clear Creek Canyon, in loose gravel and rocks between cliff and the flume of Welch Ditch, 2.60 km. (geodesic) west southwest of the GNIS location of Golden. Tom Schweich 3206. 30 Aug 2023. ( KHD ^‡ Undist. ) .

Anacardiaceae

Rhus glabra L.  Smooth Sumac. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- 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. Tom Schweich 2556. 7 Jul 2021. ( s.n. KHD75545^‡ OBI183414^‡ UCR294561^‡ ) .

- Magpie Gulch, Tom Schweich, with Cindy Trujillo 3218. 5/31/2023. .

- Stonebridge Homeowners Association, Tom Schweich 3243. 6/13/2023. .

- Tucker Gulch (lower), Tom Schweich 2908. 7/6/2022. . .

Rhus trilobata Nutt.  Squawbush. CalPhotos. Jepson eFlora. SEINet Taxon.

- Eagle Ridge, Tom Schweich 3176. 5/28/2023. .

- Golden History Park, Tom Schweich 2993. 4/25/2023. .

- Kinney Run South, 3974. 1/3/2025. .

- Magpie Gulch, Tom Schweich, with Cindy Trujillo 3130. 5/22/2023. Tom Schweich, with Cindy Trujillo 3139. 5/22/2023. Tom Schweich, with Cindy Trujillo 3226. 5/31/2023. . .

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.

- Apex Park - Northern Parcel, Tom Schweich 1875. 5/26/2020. .

- Dakota Ridge, Tom Schweich 1722. 6/14/2019. Mixed foothills grassland and shrubland, shrub density increasing above, also collected here: Celtis reticulata, Gutierrezia sarothrae, Tragia ramosa, Eriogonum alatum, and Grindelia squarrosa. Variety trilobata if infraspecific names are to be applied. Northwesternmost city limits of Golden, west side of Dakota Ridge (North Hogback), about 2/3 of the way up the west slope from Cressmans Gulch, 2.66 km. north northwest of the GNIS location of Golden. Tom Schweich 2401. 29 Jul 2020. ( COLO2433886^‡ UC ) .

- Deadman Gulch, Variety trilobata if infraspecific names are to be applied. Slightly above the watercourse locally named “Kinney Run,” between US Highway 6 and Eagle Ridge Drive, 3.2 km. south of the GNIS location of Golden Tom Schweich 2041. 2 Jun 2019. ( KHD71100^‡ OBI183249^‡ REGIS s.n. Error 14.6(b)-7c ) .

- City of Golden Parcel 40-102-01-032, 2738. 6/10/2022. .

- 407 Garden Street, Kathy Hansen-Stamp 2516. 4/28/2022. .

- Kinney Run, Tom Schweich 1639. 7/6/2018. .

- Magic Mountain, Tom Schweich 1653. 4/18/2018. .

- North Table Mountain, as R. trilobata 1114. 1114. Zeise, Larry Steven, 1976 as R. trilobata 1347. 1347. Kilburn, Paul D., and Sally L. White, 1992 .

- 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. Tom Schweich 1369. 24 May 2016. ( JCOS s.n. KHD00063919^‡ UCR277973^‡ ) Near top of small mound, also collected here: Opuntia macrorhiza and Thelesperma megapotamicum. 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. Tom Schweich 2139. 11 Jul 2019. ( JCOS s.n. KHD74277^‡ ) .

- Schweich Hill, One shrub, southwest side. Tom Schweich 1580. 8/31/2017. .

- South Table Mountain, SW facing gully 13N 0482600E 4400300N. Janet L. Wingate 2375. 1 Jun 1983. ( KHD13378^‡ ) Abundant cover plant, in fruit; Skunkbush"" S. Table Mt. W. facing slope just below mesa edge at head of minor gully. 13N 0484200E 4399200N Loraine Yeatts 699. 16 Jul 1983. ( KHD13378^‡ KHD20698^‡ ) .

- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2192. 6/12/2021. .

- Tin Cup Ridge, Tom Schweich 1759. 6/30/2019. 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. Tom Schweich 1861. 23 May 2018. ( CAS JCOS s.n. KHD00069142^‡ ) . .

Toxicodendron rydbergii (Small ex Rydb.) Greene.  Western Poison Ivy. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Apex Park - Northern Parcel, Sparse colony in wet bottom of a narrow gulch. (In California I would have called this a ravine.) Tom Schweich 1850. 5/18/2020. Tom Schweich 1878. 5/26/2020. .

- Colorado School of Mines Survey Field, Tom Schweich 1613. 5/28/2018. .

- Dakota Ridge, Tom Schweich 1740. 6/14/2019. growing in rock outcrop along the spine of the ridge. Tom Schweich 2012. 9/17/2020. .

- Magpie Gulch, Tom Schweich, with Cindy Trujillo 3102. 5/22/2023. Tom Schweich, with Cindy Trujillo 3195. 5/31/2023. .

- North Table Mountain, 1144. 1144. Zeise, Larry Steven, 1976 1354. 1354. Kilburn, Paul D., and Sally L. White, 1992 .

- North Table Mountain Park, Tom Schweich 1477. 7/22/2016. .

- Windy Saddle Park, Tom Schweich, with Cindy Trujillo 2665. 5/17/2022. .

Apiaceae

Aegopodium podagraria L.  Bishops Goutweed. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Perennial herb, to 90 cm., erect, branched, rhizomatous; Leaves, basal, petiole 150 mm., irregular to biternate, 120 mm. × 100 mm. wide, leaflet, ovate, 55 mm. × 35 mm. wide, margin serrate, cauline, reduced, sometimes opposite, ternate, leaflets, lanceolate, 53 mm. × 18 mm. wide; Inflorescence, compound umbel, 45 mm. × 75 mm. wide; Flowers, white; Ovary, glabrous, stylopodium, present; Style, #1, 1.2 mm.; Fruit, glabrous, 1.5 mm. × 1 mm. wide. Native of Eurasia, cult. in old-fashioned gardens and often escaped in ne. U.S., especially in moist, partly shaded places. Described from Coll. No. 2128, 7 Jul 2019.

- Heritage Dells, 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. Backyard of 209 Berthoud Way, Golden. 5.58 km. south of the GNIS location of Golden. Tom Schweich 2128. 7 Jul 2019. ( CDA0052300^‡ CIBO COLO2434207^‡ JCOS s.n. KHD72747^‡ OBI186006^‡ ) . .

Aletes acaulis (Torr.) J.M. Coult. & Rose.  Stemless Indian Parsley. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Golden, Slope: ledge, Aspect: South Rock ledge. A lava capped mesa in the Denver Formation South Table Mountain, mesa under Castle Rock. 13N 0482100E 4400400N. Loraine Yeatts 864. 30 Apr 1984. ( KHD21794^‡ ) Rocky outcrop. 3 mi W of Golden. Ronald L. Hartman 3117. 3 Jun 1971. ( RM295563^‡ ) .

- North Table Mountain, 1197. 1197. Kilburn, Paul D., and Sally L. White, 1992 .

- North Table Mountain Park, Collectors number is 92-66. North Table Mountain. TRS: T3S R70W S22 R.J. Rondeau, with C.A. Pague, M.A. Duff. 9266. 16 Jun 1992. ( COLO00828079^‡ ) Edges of cliffs. Southwest rim of North Table Mountain, 1.55 km north of the GNIS location of Golden. Tom Schweich 1321. 4 May 2016. ( JCOS s.n. KHD00063815^‡ UCR277964^‡ ) Base of northwest-facing wall of quarry, with Hydrophyllum fendleri, Penstemon virens, Prunus virginiana, Brickellia california, and Physaria vitulifera. 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. Tom Schweich 1925. 8 Jun 2018. ( ? JCOS s.n. KHD00069136^‡ OBI170744^‡ ) .

- South Table Mountain, South Table Mountain field, 1 mile east of Golden. Doug Fambrough 349. 21 Jun 1961. ( VSC0009066^‡ ) Occasional on rock ledges of S-facing cliff of mesa edge. S. Table Mt., a lava capped mesa in the Denver formation, under Castle Rock. UTM: 821004 Loraine Yeatts 869. 7 May 1984. ( COLO00007773^‡ ) Flowers yellow; Occasional locally found, but not on S. mesa rim. Collectors number is 83-9. South Table Mountain. Aspect: SW facing slope On rocks at base of cliff rimming mesatop on SW facing slope of S Castle Rock A lava capped mesa in the Denver Formation rock. 13N 0482200E 4400300N. Peter G. Root 839. 1 Jul 1983. ( COLO00007815^‡ KANU313743^‡ KHD21796^‡ ) .

- Welch Ditch, Also collected here: Sedum lanceolatum, Comandra umbellata subsp. pallida, Eriogonum umbellatum var. umbellatum, and Physocarpus monogynus. Popular rock-climbing area with heavy daily use. Along the former Welch Ditch, south side of Clear Creek, growing in rocks on slope above the ditch, just inside the mouth of Clear Creek Canyon, 2.58 km. west southwest of the GNIS location of Golden. Tom Schweich 2312.4 3 Jun 2020. ( COLO2434470^‡ CS198717^‡ UC ) . .

Berula erecta (Huds.) Coville.  Cut-Leaf Water Parsnip. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Golden, growing within ditch in water Between Golden and I-70, north side of the road, CO route 58. 13 0486763E 4402917N. Stanley Smookler 16. 28 Jul 1985. ( KHD28909^‡ ) . .

Conium maculatum L.  Common Poison Hemlock. Weed: CO DofA, List: C. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Clear Creek, Banks of Clear Creek, Golden. J. H. Ehlers 8391. 2 Jul 1942. ( COLO00011437^‡ MICH1431970^‡ ) .

- Colorado School of Mines Survey Field, High plains at the base of the Front Range, growing in dense vegetation along banks of a small creek. Colorado Noxious Weed List C. Eastern, lower section of the Survey Field, between US Highway 6 and Lookout Mountain, 2.2 km. south of the GNIS location of Golden. Tom Schweich 1436. 15 Jun 2016. ( CDA0050101^‡ KHD00063990^‡ UCR277995^‡ ) .

- City of Golden Parcel 40-102-01-032, Tom Schweich 3562. 6/8/2024. .

- Cottonwood Natural Area, 3951. 12/27/2024. .

- DeLong Park (City of Golden), Growing on side of small watercourse, probably pre-dates designation of park and construction. Colorado Noxious Weed List C. 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. Tom Schweich, with Carol Cameron & David Chavez 2768. 6 May 2022. ( Golden s.n. Error 14.6(b)-7c ) .

- Golden, wet bottom of gulch In wet bottom of gulch just below road to Cabrini Shrine off U.S. 40. Also lines the road from Golden to Morrison. 13N 0480526E 4394181N. Berta Anderson 1059. 28 Jun 1979. ( KHD26583^‡ ) George E. Osterhout 6029. 24 Jun 1920. ( RM163858^‡ RM87369^‡ ) 200 m. south of intersection of Hwy 6 and 19th street on west side of road. 13N 0480881E 4399372N. M. Yeatts 5. 18 Apr 1981. ( KHD29880^‡ ) .

- Heritage Square, Partially in shade and Partially in sun. 150 yards E. of the archeological project of Peabody Museum (Harvard U.). 13N 0482115E 4396178N. T R70W S10. Ernest H. Brunquist 121. 28 Jul 1960. ( CS38196^‡ KHD15678^‡ ) .

- Magpie Gulch, Tom Schweich, with Cindy Trujillo 3061. 5/22/2023. .

- North Table Mountain, 1040. 1040. Zeise, Larry Steven, 1976 1221. 1221. Kilburn, Paul D., and Sally L. White, 1992 .

- South Table Mountain, Slope: steep, Aspect: S. Occasional in damp areas. a lava capped mountain in the Denver Formation seeping cliff S. Table Mountain, at top of S. facing seeping cliff rimming gully. 13N 0484200E 4399300N. Loraine Yeatts 642. 3 Jul 1983. ( KHD21798^‡ ) .

- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2193. 6/12/2021. . .

Harbouria trachypleura (A. Gray) J.M. Coult. & Rose.  (Syn: Thaspium trachypleurum A. Gray ) Whiskbroom Parsley. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Apex Park - Northern Parcel, Small opening among Rocky Mountain junipers and ponderosa pines; also collected here: Erysimum capitatum and Physaria montana. 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 Tom Schweich 2306.1 26 May 2020. ( CDA0053741^‡ REGIS s.n. Error 14.6(b)-7c ) .

- Colorado School of Mines Survey Field, Uncommon. Steep northwest facing slope above ephemeral creek from Lookout Mountain. Eastern, lower section of the Survey Field, between US Highway 6 and Lookout Mountain, 2.35 km. south of the GNIS location of Golden. Tom Schweich 1439. 15 Jun 2016. ( KHD00064005^‡ ) .

- Golden, Ellsworth Bethel 22 Aug 1906. ( CS15090^‡ ) Mountain slope. Near Golden: Gray Hill. J. H. Ehlers 6848. 2 Jun 1938. ( RM184550^‡ ) Foothills near Golden. Marcus E. Jones A. M. 278. 20 Jun 1878. ( UTC10000^‡ ) .

- Kinney Run, Tom Schweich 1847. 5/15/2020. .

- North Table Mountain, 1375. 1375. White, Sally, and Loraine Yeatts, 1994 .

- Tin Cup Ridge, Open, rocky ridge with Cercocarpus and ponderosa pine. 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 Tom Schweich 1357. 21 May 2016. ( CAS JCOS s.n. KHD00063839^‡ OBI83173^‡ UC UCR278787^‡ ) .

- Vidler's Gulch, South facing slope, Vidler's Gulch, Golden. Hazel M. Schmoll 720. 29 Jun 1923. ( COLO00013490^‡ ) .

- Windy Saddle Park, Tom Schweich, with Cindy Trujillo 2669. 5/17/2022. . .

Ligusticum porteri J.M. Coult. & Rose.  Porter's Licorice-Root. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Perennial, 1 m., sunny mountain valley slope; Leaves, tripinnately compound; Leaflets, well-defined, ultimate leaf division, 2-3 mm.; Inflorescence, compound umbel; Involucral bractlets, green, few; Flowers, white; Ovary, glabrous; Stylopodium, conic, frilled; Fruit, glabrous; (Described from Coll. No. 3248, 10 June 2024, and Coll. No. 3269, 21 June 2024.)

- Golden, [Redacted} Mary E. Edwards [..]. ( CS79396^‡ KHD30923^‡ ) [Redacted] Stanley Smookler [..]. ( KHD28296^‡ ) . .

Lomatium orientale J.M. Coult. & Rose.  Salt-and-Pepper. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Perennial, to 20 cm., woody taproot; Leaves, compound, pinnate, 75 mm. × 26 mm. wide, ultimate divisions, ≤3 mm., ≤1 mm. wide, villous, tips, obtuse, (with a very small white “spine”); Inflorescence, compound umbel; Involucel Bracts, glabrous; Flowers, white; Anthers, red; Ovary, glabrous, stylopodium, absent; Fruit, 5 mm. × 3.5 mm. wide, ovate, glabrous, dorsally compressed, lateral ribs winged (Described from Coll. No. 1837, 17 May 2018).

- Apex Park - Northern Parcel, Tom Schweich 1803. 4/21/2020. .

- 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. Tom Schweich 1895. 28 May 2018. ( COLO02347649^‡ CS198591^‡ ) .

- Dakota Ridge, Tom Schweich 1745. 6/14/2019. Mixed-grass prairie just below foothills mountain mahogany shrubland; collected here: Cerastium arvense, Scutellaria brittonii, Amelanchier alnifolia, nearby: Cercocarpus montanus. Southern end of the hogback in northernmost Golden, 4.16 km. north northwest of the GNIS location of Golden. Tom Schweich 2265.1 9 May 2020. ( CAS CDA0053728^‡ ) .

- Deadman Gulch, Slightly above the watercourse locally named “Kinney Run,” between US Highway 6 and Eagle Ridge Drive, 50 m. northwest of Kinney Run Trail, 3.17 km. south of the GNIS location of Golden. Tom Schweich 2042.1 2 Jun 2019. ( KHD 71098^‡ ) .

- City of Golden Parcel 40-102-01-032, Tom Schweich 3563. 6/8/2024. .

- Heritage Square, MVNC S-U, 25-27, , Condition: fair. About 150 yards northeast of "Dig." 13N 0481852E 4396308N; Ernest H. Brunquist 80. 17 Apr 1960. ( KHD15674^‡ ) Alpine ridge; tundra and boulder fields; full sun and wind exposure., , Condition: fair. About 150 yards northeast of the Dig. 13N 0481852E 4396308E. Ernest H. Brunquist 92. 27 May 1960. ( KHD15716^‡ ) .

- Lookout Mountain, gravelly soil Lookout Mountain. 13N 0479440E 4397715N. Unknown 30 May 1914. ( KHD8063^‡ ) .

- Magic Mountain, Tom Schweich 1650. 4/18/2018. .

- Magpie Gulch, Dry slope west and away from rock cascade. 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. Tom Schweich, with Cindy Trujillo 2929. 21 May 2023. ( Golden ) Tom Schweich, with Cindy Trujillo 3113. 5/22/2023. .

- North Table Mountain, 1256. 1256. Kilburn, Paul D., and Sally L. White, 1992 .

- North Table Mountain Park, Widespread on mesa-top lava flow derived soils and colluvial soils of upper and lower slopes. Top of mesa, near southwest edge, 1.55 km north of the GNIS location of Golden. Tom Schweich 1322. 4 May 2016. ( JCOS s.n. KHD00063812^‡ OBI83175^‡ UCR278795^‡ ) .

- Schweich Hill, Tom Schweich 1545. 5/2/2017. with Artemisia ludoviciana, in an area of encroaching smooth brome. Near northern boundary, near the bottom of the original hill slope, 2.30 km. northwest of the GNIS location of Golden Tom Schweich 2920. 21 May 2023. ( Golden ) .

- South Table Mountain, A lava capped mesa in the Denver Formation. On mesa edge among lava boulders at top of S. facing slope. S. Table Mt. UTM: 842994 Loraine Yeatts 465. 2 May 1983. ( COLO00016089^‡ ) a lava capped mesa in the Denver Formation; on mesa edge among lava boulders at top of S. facing slope lava capped mesa in the Denver Formation. S. Table Mountain, on mesa edge among boulders. 13N 0484200E 4399400N. Loraine Yeatts 466. 2 May 1983. ( KHD21802^‡ ) Clay loam, level area on mesa. Collector's number is 54-3. Mesa 0.5 mi. s. of Golden, Colorado. Margaret M. Douglass 543. 8 Apr 1954. ( COLO00016352^‡ ) .

- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2194. 6/12/2021. .

- Tin Cup Ridge, Thin soils between layers of upturned strata. 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 Tom Schweich 1356. 21 May 2016. ( CAS JCOS s.n. KHD63817^‡ OBI83166^‡ UC UCR 278796^‡ ) .

- Windy Saddle Park, Tom Schweich 1821. 5/4/2020. . .

Musineon divaricatum (Pursh) Raf.  Leafy Wildparsley. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Eagle Ridge, Also here: Lomatium orientale, Helianthus pumilis, Mertensia lanceolata, Astragalus drummondii, Scutellaria brittonii, and Cercocarpus montanus. West-southwest-facing slope of Eagle Ridge, a locally named ridge of upturned Dakota Group between US Highway 6 and Eagleridge Drive, between Stonebridge entrance and Kinney Run, 3.75 km. south southeast of the GNIS location of Golden. Tom Schweich 2918. 9 May 2023. ( CDA56585^‡ CS202024^‡ OBI ) .

- South Table Mountain, Weed in disturbed area at edge of house lot. Locally common., , Condition: fair. a lava capped mesa in the Denver Formation; on east facing roadcut a lava capped mesa in the Denver Formation. South Table Mountain, along Quaker Road on east side of roadcut. 13N 0484332E 4399032N Loraine Yeatts 496. 16 May 1983. ( KHD21800^‡ ) .

Apocynaceae

Apocynum ×floribundum Greene.  Dogbane. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Perennial herb, to 35 cm.; Leaves, cauline, opposite, spreading horizontal, petiole 2 mm. + blade 50 mm. × 24 mm. wide, ovate, margin revolute; Sepals, 2.5 mm.; Flowers, bell-shaped, 6 mm. × 5 mm. wide, >2× calyx; Petals, fused at base, tube  mm. + lobes 2 mm., pink, drying purple, lobes erect to spreading, none reflexed; Stamens, 5. Filaments, distinct; More like A. androsaemifolium than A. cannabinum, but it seems to best fit the description of the hybrid A. ×floribundum. (Described from Coll. No. 1442, 22 June 2016.)

- Deadman Gulch, Highly disturbed habitat between trails. Between the 6th Avenue Trail and the creek of Deadman Gulch, 2.24 km. (geodesic) south of GNIS location of Golden Tom Schweich 2990. 19 Jun 2023. ( Golden ) .

- 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. Tom Schweich, with Greg McKittrick 1442. 22 Jun 2016. ( JCOS s.n. KHD00063840^‡ OBI83328^‡ UCR278005^‡ ) . .

Apocynum cannabinum L.  Indian Hemp. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Golden, George E. Osterhout 6030. 24 Jun 1920. ( RM16264^‡ ) .

- North Table Mountain, 1006. 1006. Zeise, Larry Steven, 1976 .

- South Table Mountain, west wet gully S. Table Mountain, Just above and at head of wettest part of minor gully on W. facing slope below mesa edge. 13N 0483933E 4399485N. Loraine Yeatts 703. 16 Jul 1983. ( COLO00022384^‡ KHD18904^‡ ) .

Araliaceae

Aralia nudicaulis L.  Wild Sarsaparilla. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Lookout Mountain, Lookout Mountain William Huestis 2 Aug 1916. ( COLO00022525^‡ ) .

- Vidler's Gulch, Shady, damp place between Populus tremuloides, Betula, Alnus. Vidler's Gulch, Golden. Hazel M. Schmoll 721. 29 Jun 1923. ( COLO00021733^‡ ) .

Asclepiadaceae

Asclepias L.  Milkweed. CalPhotos. Jepson eFlora. SEINet Taxon.

- 407 Garden Street, Kathy Hansen-Stamp 2522. 4/28/2022. . .

Asclepias incarnata L.  Swamp Milkweed. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Clear Creek, Verbatim Coordinates: 13N 0483324E 4401887N. USA, Colorado, Jefferson County, Clear Creek, near Lewis Station on Trarway (sic) line. Unknown 8698. 3 Aug 1913. ( KHD8698^‡ ) . .

Asclepias pumila (A. Gray) Vail.  Plains Milkweed. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Colorado School of Mines Survey Field, Tom Schweich 3364. 8/27/2023. .

- North Table Mountain, 1014. 1014. Zeise, Larry Steven, 1976 iNaturalist Observation 228192164. sdymersk 3896. 7/8/2024. .

- North Table Mountain Park, Tom Schweich 1482. 8/18/2016. Growing in low grasses and forbs. 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. Tom Schweich 1508. 22 Jul 2016. ( EIU JCOS s.n. KHD00063944^‡ UC ) Beside the Rimrock Trail near the top of North Table Mountain. Tom Schweich, with Cindy Trujillo 2390. 8/13/2021. .

- South Table Mountain, Slop: open, Aspect: West W. facing open slope above head of drainage S. Table Mountain, above head of drainage. Loraine Yeatts 579. 2 Aug 1983. ( COLO00023754^‡ KHD18905^‡ ) [ This collection number, 579, is duplicated by a collection Scutellaria brittonii made on 16 Jun 1983, and seems a little odd given the date of the collection. I think it's more likely that this is collection #759. ] Habitat: a lava capped mesa in the Denver Formation; flat meadow in disturbed roadbed; with Chryosthamnus nauseosus USA, Colorado, Jefferson County, S. Table Mt., flat meadow S. of hill 6020 in disturbed roadbed Loraine Yeatts 1340. 25 Aug 1986. ( KHD24156^‡ ) upper bank of the Olivine Trail from here about 15 meters down trail (south); not seen on undisturbed slope above and below trail. Tom Schweich 3333. 7/7/2023. . .

Asclepias speciosa Torr.  Showy Milkweed. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- 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. Tom Schweich 1204. 12 Jul 2015. ( KHD00062142^‡ ) .

- Cottonwood Natural Area, 3945. 12/27/2024. .

- Golden, Between bicycle trail and the Church Ditch. Seed pod covered with tubercles. Tom Schweich 984. 8/19/2014. .

- 17000 block of Rimrock Drive, 3855. 9/10/2024. .

- North Table Mountain, 1015. 1015. Zeise, Larry Steven, 1976 1205. 1205. Kilburn, Paul D., and Sally L. White, 1992 .

- Schweich Hill, Determination tentative. Tom Schweich 1535. 3/27/2017. .

- South Table Mountain, In swampy seeping area. S. Table Mt. Below gentle S. facing slope at edge of gully. UTM: 839994 Loraine Yeatts 707. 16 Jul 1983. ( COLO 00024059^‡ KHD00001784^‡ ) Habitat: swampy, seeping area USA, Colorado, Jefferson County, S. Table Mountain, Head of 1st drainage W. of Quaker Rd. Loraine Yeatts 835. 9 Sep 1983. ( KHD18906^‡ ) .

- Tin Cup Ridge, Mixed grasses and forbs. Collected with Achillea millefolium, Erigeron tracyi, Glycyrrhiza lepidota, and Medicago lupulina. 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. Tom Schweich 2101. 30 Jun 2019. ( JCOS s.n. KHD00070547^‡ ) .

- Tucker Gulch (lower), Tom Schweich 2903. 7/6/2022. . .

Asclepias stenophylla A. Gray.  Narrow-leaved Milkweed. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Golden, United States of America, Colorado, Jefferson County, Golden, near Golden City. Edward L. Greene 333. 15 Jul 1870. ( GH1083885^‡ ) . .

Asclepias viridiflora Raf.  Green Comet Milkweed. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Apex Park - Northern Parcel, Tom Schweich 1933. 6/10/2020. .

- Magpie Gulch, 2 plants, one with 4 stems & infl., one with no infl. Tom Schweich 3721. 6/26/2024. .

- North Table Mountain, 1016. 1016. Zeise, Larry Steven, 1976 1206. 1206. Kilburn, Paul D., and Sally L. White, 1992 Lower southwest slopes, adjacent to trail. Tom Schweich, with Cindy Trujillo 2157. 6/18/2021. .

- North Table Mountain Park, Several plants trailside, northeast North Table Mountain. Tom Schweich 1481. 7/29/2016. .

- South Table Mountain, On S. facing slope below mesa edge in clay soil; sparsely vegetated old burn site. Jefferson County, Colorado, USA. South Table Mountain. UTM: 842992 Loraine Yeatts 704. 16 Jul 1983. ( BRY0164072^‡ COLO00025791^‡ KHD1844^‡ ) .

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).

- Apex Park - Northern Parcel, Moderate northwest slope along an elk trail on the south side of the gulch; also collected here: Monarda fistulosa. South side of an unnamed gulch, near the center of the north parcel, 4.50 km. south of the GNIS location of Golden. Tom Schweich 2553. 7 Jul 2021. ( Golden ) .

- Colorado School of Mines Survey Field, Mixed shrubs and grasses on lower slopes of Lookout Mountain. High plains at the base of the Rocky Mountain Front Range, 2.4 km. south southwest of the GNIS location of Golden Tom Schweich 1485. 6 Jul 2016. ( COLO02347656^‡ CS KHD00063993^‡ OBI83306^‡ ) Tom Schweich 3292. 6/19/2023. .

- City of Golden Parcel 40-102-01-032, 2746. 6/10/2022. .

- Heritage Square, open grassy field; growing with Thermopsis sp., Descurania sp., Rosa sp., Lactuca scariola, Artemesia frigida, medium-high grasses, etc.; in dark, rich soil; well-drained, Thermopsis sp., Descurainia sp., Rosa sp., Lactuca scariola, Artemisia frigida, med Collector"s collection number is “PM-102.” “PM” probably stands for “Peabody Museum.” About 50 yards west by southwest of the archeological excavation of Peabody Museum (Harvard). 13N 0481927E 4396200N. Ernest H. Brunquist 102. 8 Jul 1960. ( CS38369^‡ KHD5649^‡ ) . [ CS38369 determined as var. occidentalis now treated as a synonym for A. millifolium. ]

- Lookout Mountain, SE-facing slope, sandy soil. Lariat Loop Rd., 1 mi. NW of I-70, 1/4 mi. SW of Golden Reservoir, SW of Golden. T4S R70W S5. J Hutchison 18. 1 Sep 1996. ( CS82047^‡ ) .

- Magpie Gulch, Tom Schweich, with Cindy Trujillo 3119. 5/22/2023. Tom Schweich, with Cindy Trujillo 3212. 5/31/2023. .

- North Table Mountain, as A. lanulosa 994. 994. Zeise, Larry Steven, 1976 as A. lanulosa 1195. 1195. Kilburn, Paul D., and Sally L. White, 1992 .

- 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. Tom Schweich 1494. 13 Jul 2016. ( CS JCOS s.n. KHD00063465^‡ ) .

- South Table Mountain, a lava capped mesa in the Denver Formation; along trail on W. facing slope lava-capped mesa in the Denver Formation S. Table Mt. along trail on W. facing slope below Castle Rock. 13N 0482100E 4400100N. Loraine Yeatts 933. 25 Jun 1984. ( KHD20610^‡ ) .

- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2195. 6/12/2021. .

- Tin Cup Ridge, Mixed grasses and forbs. Collected with Erigeron tracyi, Heterotheca villosa, Medicago lupulina, and Poa compressa. 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. Tom Schweich 2098. 30 Jun 2019. ( CDA0052295^‡ COLO2434702^‡ JCOS s.n. KHD00070549^‡ OBI183247^‡ ) .

- Windy Saddle Park, Tom Schweich 1825. 5/4/2020. Tom Schweich, with Cindy Trujillo 2643. 5/17/2022. . .

Acroptilon repens (L.) DC.  Russian Knapweed. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- North Table Mountain Park, Colony growing in open area near horse corals. Table Mountain Ranch, Golden, at NW base of Table Mountain. 13 0481744E 4405299N. Janet L. Wingate 8876. 4 Aug 2006. ( COLO00883884^‡ GREE9066^‡ KHD13845^‡ KHD56478^‡ ) . .

Agoseris glauca (Pursh) Raf.  (Syn: Troximon glaucum Pursh ) Pale Goat-Chicory. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Golden, United States, Colorado, Jefferson County, Golden, off Highway 6 Sherman Lambert 1124. 23 May 1979. ( UTEP14965^‡ ) .

- North Table Mountain, 1196. 1196. Kilburn, Paul D., and Sally L. White, 1992 . .

Agoseris parviflora (Nutt.) D. Dietr.  (Syn: A. glauca (Pursh) Raf. var. laciniata (D. C. Eaton) Smiley , Troximon parviflorum Nutt. , Troximon pubescens (Rydb.) A. Nels. ) Steppe Goat-Chicory. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Perennial herb, to 20 cm.; Leaves, basal, to 180 mm. × 6 mm. wide, not prickly, margins, generally straight (not wavy), 0- to 6-toothed, sparsely ciliate or hairy; Inflorescence, single heads on scape to 15 cm.; Phyllaries, in 2+ graduated series, 10-13-16 mm., generally green, mid-vein dark purple, margin scarious, outer phyllaries, mid-vein and margin ciliate; Ray flowers, corolla, 20-22 mm., yellow (drying more purple than pink), lobes 5; Disc flowers 0; Pappus, simple capillary bristles; Achene, surface smooth, beak unknown (immature). (Described from Coll. No. 1101, 3 May 2015)

- Apex Park - Northern Parcel, Also seen or collected here: Juniperus scopulorum, Oenothera suffrutescens, Linaria dalmatica, and Cynoglossum officinale. 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. Tom Schweich 2295. 26 May 2020. ( JCOS s.n. KHD00073450^‡ OBI149342^‡ UCR ) .

- Colorado School of Mines Survey Field, USA, Colorado, Jefferson, Base of Lookout Mountain, Golden J. H. Ehlers 6906. 4 Jun 1938. ( UTC62024^‡ ) .

- Eagle Ridge, Nearly flat soil along top of hogback, with Helianthus pumilis, Cercocarpus montanus, Penstemon virens, Alyssum simplex, Erodium cicutarium, and Bromus tectorum. Local name for a small hogback composed of vertically-upturned Cretaceous-age Dakota Group between Deadman Gulch and US Highway 6, about 3.5 km. south of the GNIS location of Golden. Tom Schweich 2926. 28 May 2023. ( Golden ) .

- Golden, Dry hills. Golden. Ellsworth Bethel, with H. M. Schmoll and I. W. Clokey 4415. 9 Jun 1921. ( COLO29801^‡ IND120683^‡ NY1877182^‡ RM90088^‡ ) [ Originally ID as A. laciniata (Nutt.) Greene. Annotations: Agoseris glauca var. laciniata (Eat.) Smiley, det. Q. Jones 1953. / Agoseris glauca (Pursh) Raf. var laciniata (Eaton) Smiley, det. W. A. Weber 1993. , IND-0120683 determined as Agoseris grandiflora Kuntze. ] On clay banks. West of State School of Mines. Golden. Ellsworth Bethel, with I. W. Clokey and H. M. Schmoll 227. 19 Jun 1921. ( COLO00029843^‡ COLO00029850^‡ ) Slopes of Hog Back, Near Golden, Jefferson Co. J. H. Ehlers 8023. 1 Jun 1940. ( UT110661^‡ ) .

- Lookout Mountain, On slope leading to Lookout Mountain. 13N 0480756E 4398143N. Unknown 1 Jun 1913. ( KHD6374^‡ ) .

- Mount Galbraith Park, Small saddle on ridge, 40 m north of Nightbird Gulch Trail. 2.3 km northwest of the GNIS location of Golden. Tom Schweich 1101. 3 May 2015. ( JCOS s.n. KHD56936^‡ ) .

- South Table Mountain, Common at base of S. facing slope below mesa edge. S. Table Mt. UTM: 842996. Loraine Yeatts 535. 1 Jun 1983. ( COLO00029868^‡ KHD19483^‡ ) . [ Miscellaneous: Originally ID as A. glauca (Pursh) Raf. Annotations: Agoseris glauca (Pursh) Raf. var laciniata (Eaton) Smiley, det. W. A. Weber 1993. , Remains determined A. glauca (Pursh) Raf. ] .

… pistillate flowers … palea bases fused, becoming a hard bur with each pistillate flower in a separate chamber, tips (occasionally not evident in flower heads) becoming hard knobs, spines, or scarious wings … (Baldwin, et al., 2012)

Ambrosia acanthicarpa Hook.  Flat-Spine Burr-Ragweed. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora. Waif

- DeLong Park (City 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. In planted native grass beds, along 23rd Street, opposite Vernon Drive, 1.72 km. southeast of the GNIS location of Golden. Tom Schweich 2908. 18 Aug 2022. ( KHD00078703^‡ ) . .

Ambrosia artemisiifolia L.  (Syn: A. artemisiifolia L. var. elatior (L.) Descourt. ) Annual Ragweed. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- North Table Mountain, 1002. 1002. Zeise, Larry Steven, 1976 .

- South Table Mountain, A lava capped mesa in the Denver formation; ephemeral pond; in damp mud of last area of pond bed to dry; associates include Rorippa sinuata, Xanthium strumarium, Thlaspi arvense, Polgonum erectum ssp. Achoreum, Eleocharis acicularis, Xanthium strumarium, Sunny meadow. South Table Mountain; ephemeral pond on flats above south rim, W of Quaker Rd. 13 0483540E 4399950N. Loraine Yeatts 4207. 17 Oct 1998. ( KHD35614^‡ ) . .

Ambrosia psilostachya DC.  Western Ragweed. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Perennial herb, to 40 cm., woody at base; Leaves opposite below, alternate above, 50 mm. × 22 mm., ovate, pinnately divided; Inflorescence indeterminate, appearing raceme-like, 2 kinds of flowers, pistillate heads many, distal, carpellate heads few, clustered in distal leafy axils; Phyllaries fused into a cup; Receptacle not chaffy; Pappus absent (Described from Coll. No. 1068, 8 Oct 2014).

- Colorado School of Mines Survey Field, Common plant of the plains of Colorado, especially up against the Front Range, also found at lower elevations on the west slope. 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. Tom Schweich 3223. 17 Sep 2023. ( Undist. ) Common plant of the plains of Colorado, especially up against the Front Range, also found at lower elevations on the west slope. 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. Tom Schweich 3224. 17 Sep 2023. ( Undist. ) Tom Schweich 3361. 8/27/2023. .

- City of Golden Parcel 40-102-01-032, Tom Schweich 3564. 6/8/2024. .

- DeLong Park (City 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. Hydroseeded “native” area, north corner of park on 23rd Street opposite Table Drive, 1.74 km. southeast of the GNIS location of Golden. Tom Schweich 2916. 15 Sep 2022. ( Golden ) .

- Golden, United States of America, Colorado, Jefferson Co., Golden N. L. Britton 8 Oct 1882. ( NY1884082^‡ ) .

- 407 Garden Street, 2948. 9/20/2022. .

- 17000 block of Rimrock Drive, 3848. 9/10/2024. .

- Heritage Square, Near Golden, east of Peabody Museum Dig. 13N 0481541E 4396050N. Ernest H. Brunquist 62. 23 Sep 1959. ( CS37483^‡ KHD29957^‡ ) Aspect: S medium-high grass (see PM-24) on a gentle, south-facing slope, medium-high grass (PM-24) very common along Quaker Rd., 100 yards east of archeological project of Peabody Museum (Harvard Univ.) 13N 0482095E 4396063N Ernest H. Brunquist 125. 2 Aug 1960. ( CS38201^‡ KHD10301^‡ ) .

- Kinney Run, Tom Schweich 1637. 7/6/2018. .

- North Table Mountain, 1200. 1200. Kilburn, Paul D., and Sally L. White, 1992 .

- 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. Tom Schweich 1062. 29 Aug 2014. ( CAS UC2045777^‡ ) Rocky slope with little soil development near rim of mesa. 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. Tom Schweich 1068. 8 Oct 2014. ( JCOS s.n. OBI82138^‡ UCR266095^‡ ) .

- Schweich Hill, Northeast sector, just west of the mowed area, among smooth brome. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1748. 31 Aug 2017. ( EIU KHD00065354^‡ ) Southwest aspect, top of hill, gravel-covered upturned Laramie and Arapahoe Formations. Other collections identify this location as “North Washington Open Space.” Top of hill, center of parcel, 1.77 km. (geodesic) north northwest of the GNIS location of Golden. Tom Schweich 3220. 12 Sep 2023. ( Undist. ) .

- South Table Mountain, South table mountain, Common at edge of quaker road. 13N 0484233E 4399170N. Loraine Yeatts 768. 7 Aug 1983. ( COLO00031096^‡ KHD19334^‡ ) West side of South Table Mountain, along south loop of Lubahn Trail, 1.17 km east southeast of the GNIS location of Golden. Tom Schweich 1069. 16 Oct 2014. ( OBI82121^‡ ) mesatop flats lava capped mesa in the Denver Formation S. Table Mt., along E-W road N of Quaker Rd. gate. 13N 0484291E 4399486N. Velma Richards 1383. 18 Sep 1984. ( KHD20928^‡ ) .

- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2196. 6/12/2021. . .

Ambrosia tomentosa Nutt.  Skeleton-Leaf Bursage. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- North Table Mountain, 1003. 1003. Zeise, Larry Steven, 1976 . .

Ambrosia trifida L.  (Syn: A. trifida L. var. trifida ) Giant Ragweed. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Golden History Park, Most likely native to Golden, but found in an area of planted, non-native, vegetation. West end of Golden History Park, at the western entrance gate, 395 m. west of the GNIS location of Golden. Tom Schweich 3202. 29 Aug 2023. ( KHD ^‡ ) .

- 17000 block of Rimrock Drive, 3861. 9/10/2024. .

- Heritage Square, 13N 0481833E 4396313N. Ernest H. Brunquist 13. 16 Aug 1959. ( CS23949^‡ KHD24460^‡ ) .

- North Table Mountain, 1309. 1309. Kilburn, Paul D., and Sally L. White, 1992 .

- South Table Mountain, Aspect: N At base of rocky N. facing slope. (A lava capped mesa in the denver formation) lava capped mesa in the Denver Formation rocky Locally abundant, , Condition: fair S. Table Mountain, head of gully overlooking Rolling Hills Country Club. 13N 0484107E 4400381N. Loraine Yeatts 1084. 18 Sep 1984. ( COLO00031633^‡ KHD20834^‡ ) . .

Anaphalis margaritacea (L.) Bentham & Hooker.  Western Pearly Everlasting. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Apex Park - Northern Parcel, Mixed foothills shrubland, just below the ponderosa pines, also collected nearby: Claytonia rosea, Ceanothus fendleri, and Eriogonum umbellatum var ramulosum. 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 Tom Schweich 2388. 17 Jul 2020. ( JCOS s.n. ) .

- North Table Mountain Park, North Table Mountain. Mark Duff 178. 16 Jun 1992. ( COLO00032193^‡ ) .

- Windy Saddle Park, Tom Schweich, with Cindy Trujillo 2647. 5/17/2022. Sunny spot at edge of Douglas fir forest, also seen here: Anemone patens, Amelanchier alnifolia, and Viola canadensis. 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. Tom Schweich, with Cindy Trujillo 2784. 17 May 2022. ( Golden ) . .

Antennaria .  Pussytoes. CalPhotos. Jepson eFlora. SEINet Taxon.

- City of Golden Parcel 40-102-01-032, Tom Schweich 3565. 6/8/2024. . .

Antennaria parvifolia Nutt.  Small-Leaf Pussytoes. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Perennial herb, to 10 cm., stoloniferous; Stem, tomentose; Leaves, basal and cauline, basal, petiole, gradually expanding into blade, blade, 16 mm. × 6.7 mm. wide, oblanceolate, entire, glandular, tomentose, tips, pointed, cauline, 10 mm. × 2 mm. wide, linear; Inflorescence, heads enclosed by an involucre, #3 per stem, not showy; Involucre, 7 mm. × 4.5 mm. wide, cylindric; Phyllaries, 5+ series, 4 mm. × 2 mm. wide to 8 mm. × 1 mm. wide, green proximally to white (pinkish) distally, tomentose, margins, flat, scarious, tips, rounded; Receptacle, epaleate; Flowers, of 1 kind; Disk flowers, many, 6.5 mm., white; Pappus, many, well-developed, bristles, 8 mm., ±equal; Cypsela, 0.8 mm. × 0.3 mm. wide, brown, glabrous. (Described from Coll. No. 1909, 31 May 2018.)

- Apex Park - Northern Parcel, Mixed grass and foothill shrubland, near a thicket of Prunus americana and Rhus trilobata; Senecio integerrimus and Cynoglossum officinale also here. Along the eastern edge of the Apex Park - North parcel, open, north-facing aspect, 4.73 km. south of the GNIS location of Golden. Tom Schweich 2282. 18 May 2020. ( CS JCOS s.n. KHD00073453^‡ REGIS ) .

- 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 Tom Schweich 2049. 2 Jun 2019. ( CDA0052288^‡ COLO2434785^‡ KHD00072803^‡ UC ) .

- Lookout Mountain, Above Golden. Mrs. Ella Bailar 1905. ( COLO00034850^‡ ) .

- North Table Mountain, 1201. 1201. Kilburn, Paul D., and Sally L. White, 1992 .

- South Table Mountain, Slop: gentle, Aspect: N On gentle N facing slope at edge of shrubt thicket of Mt Mahogany and ninebark. Only a few plants and only place seen on mesa, mountain mahogany and ninebark. S. Table Mt. A lava capped mesa in the Denver formation. 13N 0484008E 4400106N. Loraine Yeatts 1197. 19 May 1985. ( COLO00035006^‡ KHD24460^‡ ) . .

Antennaria rosea Greene.  Rosy Pussytoes. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Perennial herb, to 9 cm., stoloniferous 4-5 cm., forming loose mats in wet muddy soil, all sixteen plants collected pistillate (gynoecious?); Leaves, simple, white tomentose both sides, basal, 35 mm. × 9 mm wide, oblanceolate, cauline, 11-13 mm., linear; Inflorescence, >> basal leaves; Involucre, 5.5-7.0 mm.; Bracts (phyllaries), 5.0-6-5 mm. × 1.1-0.7 mm. wide, green at base, purplish band in middle, tips, white, scarious. (Described from Coll. No. 1083, 25 April 2015).

- Lookout Mountain, On dry slope of granite and schist in open ponderosa pine forest. Transferred from USGS Herbarium, Denver, CO (2005). Lariat Trail, Lookout Mountain. Hansford T. Shacklette 6670. 19 May 1962. ( COLO00857474^‡ COLO13866624^‡ ) .

- North Table Mountain, 1005. 1005. Zeise, Larry Steven, 1976 . .

Arctium minus Bernh.  Lesser Burdock. Weed: CO DofA, List: C. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Apex Gulch, Lower Apex Gulch, down in the gulch, below the trail. Tom Schweich, with Cindy Trujillo 2394. 8/25/2021. .

- Apex Park - Northern Parcel, Tom Schweich 1937. 6/10/2020. .

- Deadman Gulch, Also seen in several other places along Deadman Gulch. Colorado Noxious Weed List C. Along Deadman Gulch (Kinney Run), between US Highway 6 and Eagle Ridge Drive, on a bank of the creek, 3.24 km. south of the GNIS location of Golden. Tom Schweich 2425. 17 Aug 2020. ( CDA0053776^‡ COLO2433811^‡ CS198694^‡ KHD00073455^‡ ) .

- DeLong Park (City of Golden), 3933. 3933. .

- Golden, iNaturalist Observation 182070722. Tom Schweich 3447. 9/6/2023 10:50:00 AM. along sidewalk Tom Schweich 3819. 7/19/2024. .

- Golden History Park, Tom Schweich 3392. 8/29/2023. .

- Heritage Square, south bank of creek in partial shade, on rocks. S bank of Apex Ck about 2 1/2 mi S of Golden. T R70W S10. Ernest H. Brunquist 73. 26 Sep 1959. ( CS23957^‡ KHD6371^‡ ) .

- Stonebridge Homeowners Association, Tom Schweich 3303. 6/21/2023. . .

Arnica cordifolia Hook.  Heart-Leaf Leopardbane. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Lookout Mountain, On moist soil bank in ponderosa pine-douglas fir ravine. Ralph Cannon ranch, Lookout Mountain. Hansford T. Shacklette 5934. 4 Jul 1959. ( COLO00857516^‡ ) On rocky slope in dense ponderosa pine forest. Transferred from USGS Herbarium, Denver, CO (2005). Lariat Trail, Lookout Mountain. Hansford T. Shacklette 6671. 19 May 1962. ( COLO00857524^‡ COLO00857532^‡ ) . .

Arnica fulgens Pursh.  Shining Leopardbane. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Perennial herb of wetlands, moist, or somehow equible areas, to 35 cm., glandular hairy throughout; Leaves, mostly basal and few cauline, basal, axils with 5 mm. brown wavy hair, petiole 50-70 mm. + blade 60-100 mm. × 12-30 mm. wide, 3.3-5 × longer than wide, lanceolate, tip obtuse, cauline, opposite, sessile, ±2 pair, much reduced; Inflorescence, showy, single heads on peduncle to 80 mm., flowers of two kinds; Involucre, 13-15 mm. × 22-30 mm. wide; Phyllaries, 2 ±equal series, 11-14 mm.× 3-3.5 mm. wide, margins, flat, tips, obtuse green with dark tips glandular-hairy abaxially; Receptacle epaleate; Rays, #12, fertile, tube 3-5 mm. + blade 16-19 mm. × 7-7.5 mm. wide = 19-24 mm., corolla yellow; Disc flowers, tube 7-7.5 mm. + lobes ≤1 mm. = 8-8.5 mm.; Pappus, bristles, 9 mm., white, barbelate; Anther, yellow; Achene, 5 mm., short hairy. Described from Coll. Nos. 1119, 1371, and 1871. Subtribe Arnicinae is a sister subtribe to Madiinae (tarweeds) and Hulseinae, which contains both Hulsea and Eatonella, both common in the Mono Lake basin. Described by Pursh in Fl. Am. Sept. 2: 527 “On the banks of the Missouri,” but this is not a Lewis & Clark collection. Perhaps it is a Nuttall collection from 1810. Holotype: BM?, Isotype: PH.

- Golden, Cobble soil. Flat exposure. Golden. F. A. Branson 4 Jun 1958. ( COLO00857540^‡ ) .

- North Table Mountain, 1203. 1203. Kilburn, Paul D., and Sally L. White, 1992 .

- Tin Cup Ridge, Amid trees and shrubs, east exposure. 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. Tom Schweich 1871. 23 May 2018. ( CAS CDA0052354^‡ JCOS s.n. KHD00069227^‡ UC ) . .

Note: For some taxa, e.g., A. campestris, it is important to note presence or absence of a basal rosette when collecting.

Artemisia absinthium L.  Common Wormwood. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Golden, iNaturalist Observation 187544031. Tom Schweich 3473. 10/14/2023. .

- 407 Garden Street, 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 Record ID 10688546. On the shoulder of the road at 407 Garden Street, 1.39 km. north of the GNIS location of Golden. Tom Schweich, with Cathy Hansen-Stamp 2917. 21 Sep 2022. ( KHD00079747^‡ ) . .

Artemisia campestris L.  Field Sagewort. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Perennial herb, to 60 cm., longer lived than biennial; Stem, 4± per caudex, reddish; Leaves, basal mostly withered, cauline, 8 mm. × 0.6 mm. wide, narrowly oblanceolate, tomentose; Inflorescence, 130 mm. × 20 mm. wide; Heads, many, 2 mm. × 2 mm. wide; Phyllaries, 2+ series, 1.5 mm. × 1 mm. wide, green to scarious; Receptacle, naked. Described fromColl. No. 1767, 1 Sep 2017. Note: It is important to note presence or absence of a basal rosette when collecting.

- Apex Gulch, Growing unshaded in dry portion of creek, in small clumps. Apex creek, within 1/4 mile of east end of canyon of creek. (immediately west of magic Mt. Amusement park.) 13N 0482132E 4396180N. Ernest H. Brunquist 75. 26 Sep 1959. ( CS23959^‡ KHD7008^‡ ) .

- Golden, United States of America, Colorado, Jefferson Co., Golden N. L. Britton 8 Oct 1882. ( NY1893118^‡ ) .

- North Table Mountain, 1204. 1204. Kilburn, Paul D., and Sally L. White, 1992 .

- Schweich Hill, Tom Schweich 2117. 5/16/2021. . .

Artemisia dracunculus L.  (Syn: Oligosporus dracunculus (L.) Poljakov ssp. glaucis (Pall. ex Willd.) A. Löve & D. Löve ) Tarragon, Dragon Wort. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Apex Park - Northern Parcel, Mixed foothills shrubland, with a few Rocky Mountain junipers, ponderosa pines are a little higher, also collected here: Collinsia parviflora and Andropogon gerardii. 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. Tom Schweich 2386. 17 Jul 2020. ( CDA0053764^‡ COLO2434447^‡ CS REGIS ) Also seen or collected here: Eriogonum effusum, Ericameria nauseosa var. graveolens, Senecio spartioides (in bud, no flowers), Solidago missouriensis, and Xanthisma spinulosum. 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. Tom Schweich 2431.2 19 Aug 2020. ( JCOS s.n. KHD00073461^‡ ) .

- Colorado School of Mines Survey Field, Tom Schweich 2535. 4/29/2022. Tom Schweich 3363. 8/27/2023. .

- City of Golden Parcel 40-102-01-032, 2752. 6/10/2022. .

- 407 Garden Street, Kathy Hansen-Stamp 2517. 4/28/2022. .

- Grampsas North, 3919. 12/7/2024. .

- Kinney Run South, 3972. 1/3/2025. .

- 17000 block of Rimrock Drive, 3842. 9/10/2024. .

- North Table Mountain, 1010. 1010. Zeise, Larry Steven, 1976 Uppermost southwest slopes of North Table Mountain, just below the basalt flow capping the mesa, 1.7 km. north of the GNIS location of Golden. Tom Schweich 1554. 1 Sep 2016. ( EIU JCOS s.n. KHD00063997^‡ OBI83374^‡ UC ) .

- Schweich Hill, Eastern slope adjacent to social trail over the top of the hill. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1754. 31 Aug 2017. ( KHD00065159^‡ UCR289253^‡ ) .

- South Table Mountain, A lava capped mesa in the Denver formation. Occasional with mixed vegetation including Chrysothamnus nauseosus, C. nauseosus ssp. graveolens, Asclepias pumilis, Adenolinum lewisii. Front Range, South Table Mt, Meadow W of Quaker Road and S of Hill 60220. 13N 0483972E 4398546N. Loraine Yeatts 2224. 26 Sep 1989. ( COLO00112136^‡ KHD27209^‡ ) . .

Artemisia filifolia Torr.  (Syn: Oligosporus filifolius (Torrey) Poljakov ) Sand Sage, Old-Man Sagebrush. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- North Table Mountain, 1011. 1011. Zeise, Larry Steven, 1976 . .

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).

- Apex Gulch, infrequent along gravelly and rocky trail path Apex trail (N of Heritage Square) 20 ft. W of concrete walkway. T4S R70W S9. E Rangel 17. 21 Sep 2002. ( CS84042^‡ ) .

- Colorado School of Mines Survey Field, Tom Schweich 2540. 4/29/2022. .

- Dakota Ridge, Tom Schweich 1708. 6/14/2019. .

- City of Golden Parcel 40-102-01-032, 2783. 6/10/2022. .

- Golden, common on mtn slopes near Denver, especially near Golden. Time of pollination -- July-September; hay fever reaction--positive, Donor: JJWaring Collection. Golden, mountain slopes, especially near Golden. 13 0480565E 4400448N. Maxy Pope 19 Jul 1924. ( KHD6985^‡ ) United States of America, Colorado, Jefferson Co., Golden N. L. Britton 8 Oct 1882. ( NY1894491^‡ ) .

- 407 Garden Street, Kathy Hansen-Stamp 2507. 4/28/2022. .

- Grampsas North, 3913. 12/7/2024. .

- Kinney Run South, 3983. 1/3/2025. .

- 17000 block of Rimrock Drive, 3841. 9/10/2024. .

- Heritage Square, open ground ca 2 1/2 mi S of Golden. T R70W S10. Ernest H. Brunquist 53. 10 Sep 1959. ( CS37477^‡ ) .

- Magic Mountain, Tom Schweich 1651. 4/18/2018. .

- Magpie Gulch, Tom Schweich, with Cindy Trujillo 3155. 5/22/2023. .

- North Table Mountain, 1012. 1012. Zeise, Larry Steven, 1976 1333. 1333. Kilburn, Paul D., and Sally L. White, 1992 .

- North Table Mountain Park, Rocky slope with little soil development near rim of mesa, growing with Brickellia. 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. Tom Schweich 1067. 9 Oct 2014. ( CAS UC2045775^‡ UCR266094^‡ ) .

- Schweich Hill, Tom Schweich 1543. 5/2/2017. .

- South Table Mountain, Extremely common on S facing slope below mesa edge in lava clay soil. South Table Mountain. 13N 0484199E 4399201N. Loraine Yeatts 675. 11 Jul 1983. ( BRY215667^‡ COLO00043281^‡ KHD19335^‡ ) .

- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2197. 6/12/2021. . .

Artemisia ludoviciana Nutt.  Silver Wormwood. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora. No Golden collections determined as to infra-specific taxa.

- Apex Gulch, Growing on the bank and close to the creek. Growing on the bank and close to Apex Creek, within the first 1/4 mile of the east end of the canyon of the Creek; and within 1/2 mile of the archeological project of Peabody Museum, and west by southwest of it. 13N 0481593E 4395771N; TRS: T4S R70W sec 10 Ernest H. Brunquist 76. 26 Sep 1959. ( KHD40659^‡ KHD7002^‡ ) .

- Colorado School of Mines Survey Field, Tom Schweich 2536. 4/29/2022. .

- Dakota Ridge, Tom Schweich 1697. 6/14/2019. .

- City of Golden Parcel 40-102-01-032, 2739. 6/10/2022. .

- Golden, United States of America, Colorado, Golden N. L. Britton 8 Oct 1882. ( NY158512^‡ ) .

- Golden Reservoir, SE-facing slope, sandy soil. Lariat Loop Rd., 1 mi. NW of I-70, 1/4 mi. SW of Golden Reservoir, SW of Golden. T4S R70W S5. J Hutchison 19. 1 Sep 1996. ( CS82046^‡ ) .

- 407 Garden Street, Kathy Hansen-Stamp 2482. 4/27/2022. .

- Grampsas North, 3915. 12/7/2024. .

- Kinney Run South, 3966. 1/3/2025. .

- 17000 block of Rimrock Drive, 3840. 9/10/2024. .

- South Illinois Open Space, 3936. 12/20/2024. .

- Heritage Square, near the base of east-facing hillside; unshaded about 3/4ths mi. west and a little south of the archeological site of Peabody Museum. 13N 0481541E 4396050N. Ernest H. Brunquist 30. 20 Aug 1959. ( CS23916^‡ KHD6998^‡ ) .

- Magic Mountain, Tom Schweich 1643. 4/18/2018. .

- Magpie Gulch, Tom Schweich, with Cindy Trujillo 3049. 5/22/2023. .

- North Table Mountain, 1013. 1013. Zeise, Larry Steven, 1976 1334. 1334. Kilburn, Paul D., and Sally L. White, 1992 .

- Schweich Hill, Tom Schweich 1516. 3/27/2017. Var. ludoviciana if infraspecific names are to be applied. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1753. 31 Aug 2017. ( CS KHD00065158^‡ ) .

- South Table Mountain, In occasional patches along hardpacked clay road South Table Mountain, along road to castle rock. 13N 0482899E 4400495N. Loraine Yeatts 811. 20 Aug 1983. ( COLO00045195^‡ KHD19336^‡ ) .

- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2198. 6/12/2021. . .

Artemisia ludoviciana Nutt. ssp. ludoviciana.  (Syn: A. britonii Rydb. ) White Sagebrush. CalPhotos. Jepson eFlora. SEINet Taxon.

Perennial herb, to 40 cm, unarmed, spreading by rhizomes; Leaf tomentose abaxially, sparse tomentose adaxially, proximal wedge-shaped, 40 mm × 15 mm wide, 3+-toothed, ≤⅓ leaf-width, distal lanceolate, entire (Described from Coll. No. 898, 24 August 2012, Frequency and depth of leaf lobing distinguishes between ssp. ludoviciana and ssp. incompta. These leaves are neither 2°-divided, nor deeper than ⅓-width, nor divided nearly to the mid-rib. Therefore, ssp. ludoviciana is applied rather than ssp. incompta).

- Colorado School of Mines Survey Field, Highest mixed grass prairie near Rocky Mountain Front Range scarp, also nearby: Asclepias pumila, Ambrosia psilostachya, Artemisia dracunculus, Liatris punctata, and Evolvulus nuttallianus. Southeast corner of Survey Field, 2.45 km. (geodesic) south of the GNIS location of Golden Tom Schweich 3191. 27 Aug 2023. ( Undist. ) .

- Schweich Hill, This area was graded then revegetated circa 2006, though this taxon is more likely adventive rather than revegetated. Other collections may identify this location as “North Washington Open Space.” Near the western border of Schweich Hill, about mid-way up the slope, 1.81 km. (geodesic) north northwest of the GNIS location of Golden. Tom Schweich 3219. 12 Sep 2023. ( Undist. ) . .

Bahia dissecta (A. Gray) Britton.  (=Hymenothrix dissecta (A. Gray) B. G. Baldwin) Ragleaf Bahia. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Golden, Wet, gravelly areas. Golden: US Hwy 6 at crossing of Clear Creek. Ronald C. Wittmann, with Judy Wittman 1881. 13 Sep 1981. ( COLO00049536^‡ RM358663^‡ ) . .

Balsamorhiza sagittata (Pursh) Nutt.  Arrow-Leaf Balsamroot. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Perennial herb, to 50 cm.; Leaves, mostly basal, 20 cm. × 12 cm, widely triangular, base sagittate, tomentose, cauline much reduced; Inflorescence, solitary heads on 40 cm. scape, radiate, composed of 2 kinds of flowers, some strap-shaped; Phyllaries, in 2+ series, not all subtending ray flowers, eglandular, outer lance-linear, 18 mm. × 4 mm. wide, veins, 5, prominent, base to full length tomentose abaxially, adaxially distally, inner obovate, 11 mm. × 4 mm. wide, distal abaxial tomentose and ciliate; Receptacle, paleate; Paleae, 11 mm × 3 mm. wide, ciliate, and distal abaxial tomentose, palea covers all abaxial side of disc flower ovary, and is barely folded around one edge, not fully enclosing ovary; Pappus 0; Ray flower, fertile, stamens present but degenerate (?) and not functional (?), corolla, tube 2 mm. + blade 27-32 mm. × 11-12 mm. wide, yellow; Disc flowers, bisexual, corolla, 6 mm., yellow; Achene, 9 mm., compressed radially. Described from Coll. No. 956, 22 May 2013 (Mono County, CA) and Coll. No. 1109, 14 May 2015 (Jefferson County, CO).

- Tin Cup Ridge, East across US Highway 40 from the Peabody Museum dig at Magic Mountain, which was extensively collected by E. H. Brunquist (1959). 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. Tom Schweich 1109. 14 May 2015. ( CAS KHD56904^‡ OBI82132^‡ UC UCR266092^‡ ) Tom Schweich 1754. 6/30/2019. Usually described as a western slope plant. Perhaps planted here. Regardless, it is naturalized and spreading, if not native. 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. Tom Schweich 2252. 30 Apr 2020. ( CDA0053724^‡ COLO2433704^‡ CS198728^‡ JCOS s.n. REGISs.n. Error 14.6(b)-7c ) . .

Brickellia Elliott.  Brickel Bush. CalPhotos. Jepson eFlora. SEINet Taxon.

- Magic Mountain, Tom Schweich 1657. 4/18/2018. . .

Brickellia californica (Torrey & A. Gray) A. Gray.  California Brickelbush. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- North Table Mountain, 1338. 1338. Kilburn, Paul D., and Sally L. White, 1992 .

- North Table Mountain Park, Tom Schweich 1449. 7/30/2015. Growing in cracks of cliffs and talus just below cliffs. Tom Schweich 1460. 10/12/2015. 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. Tom Schweich 1546. 1 Sep 2016. ( COLO02348654^‡ EIU JCOS s.n. KHD00063965^‡ OBI83343^‡ UC ) iNaturalist Observation 185074172. Tom Schweich 3461. 9/26/2023. .

- South Table Mountain, in pit of disturbed area of lava gravel; little other vegetation. USA, Colorado, Jefferson County, S. Table Mt. 13N 0484200E 4499700N Loraine Yeatts 832. 9 Sep 1983. ( COLO00051870^‡ KHD19329^‡ ) Top of Castle Rock. Tom Schweich 1793. 10/19/2019. . .

Brickellia eupatorioides (L.) Shinners.  False Boneset. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora. Perhaps B. suaveolens (Fresen) Nesom, with B. eupatorioides (L.) Shinners misapplied.

Perennial herb, to 40 cm.; Leaves, alternate, short-petioled (2 mm.), 48 mm. × 7 mm. wide, lanceolate, tip obtuse, margin entire, glandular-punctate, sparsely strigose; Inflorescence, corymbiform, heads in groups of 4-5; Involucre, 8.5 mm. × 6 mm. wide; Phyllaries, 3+ series, graduated, 2-8.5 mm. × 0.5 mm. wide, prominently veined “longitudinally striate,” margin scarious, tip acuminate to spinulose; Receptacle, epaleate; Disk flowers, #19, corolla, 7 mm., yellow; Pappus, plumose bristles, 6 mm.; Cypsela, many ribs (maybe 10). (Described from Coll. No. 1553, 1 Sep 2016.)

- Apex Park - Northern Parcel, Northeast corner of parcel, lower alluvial slope, also collected at parcel boundary to the north. Tom Schweich, with Cindy Trujillo 2409. 9/1/2021. 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. Tom Schweich, with Cindy Trujillo 2740. 1 Sep 2021. ( Golden OBI183782^‡ ) .

- Cottonwood Natural Area, 3946. 12/27/2024. .

- Golden, Dry rolling plains. J. H. Ehlers 8347. 25 Sep 1941. ( COLO 00052324^‡ ) Plains east of Golden. J. H. Ehlers 8540. 23 Sep 1942. ( COLO00053371^‡ ) iNaturalist Observation 187544640. Tom Schweich 3474. 10/14/2023. .

- Grampsas North, 3922. 12/7/2024. .

- North Table Mountain, as B. rosmarinifolius (sic) 1215. 1215. Kilburn, Paul D., and Sally L. White, 1992 iNaturalist Observation 185066759. Tom Schweich 3459. 9/26/2023. .

- North Table Mountain Park, 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. 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. Tom Schweich 1553. 1 Sep 2016. ( JCOS s.n. KHD00063999^‡ ) .

- Schweich Hill, On a bank that was formerly cut, unknown whether it was intentionally regevetated or not. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1758. 31 Aug 2017. ( CAS KHD00065163^‡ UCR ^‡ ) 20-30 plants mostly concentrated in a 10 m x 10 m patch, scattered in Bromus inermis with Artemisia dracunculus, Ericameria nauseosa var. graveolens, and Liatris punctata. Mowing occurred from approximately 2007 to 2018. Other collections may identify this location as “North Washington Open Space.” Near the northern border of Schweich Hill, in the eastern section that was mowed by neighbors for about twenty years, 1.75 km. (geodesic) north northwest of the GNIS location of Golden. Tom Schweich 3218. 12 Sep 2023. ( Undist. ) top of hill, both sides of social trail Tom Schweich 3396. 9/12/2023. Numerous plants in an area formerly mowed by neighbors. Tom Schweich, with Cathy Hansen-Stamp and Barry Stamp 2455. 9/25/2021. .

- South Table Mountain, South Table Mountain near Golden. 13N 0483016E 4400491N. Berta Anderson, with Loraine Yeatts 1946. 25 Sep 1984. ( KHD24159^‡ ) Sloping E facing roadcut. S Table Mt. Loraine Yeatts 817. 29 Aug 1983. ( CS79096^‡ KHD7805^‡ ) A lava capped mesa in the Denver Formation; growing with Kuhnia rosmarinifolia which is much more common. USA, Colorado, Jefferson County, S. Table Mt.; at edge of mesatop rd. N. of Quaker Rd. gate . Loraine Yeatts 1095. 18 Sep 1984. ( COLO00052209^‡ KHD20720^‡ ) South Table Mesa near Golden. 13N 0483016E 4400491N. Loraine Yeatts, with Berta Anderson? 1945. 24 Sep 1984. ( KHD24158^‡ ) .

- South Table Mountain Park, single plant 3866. 9/11/2024. one plant, very sandy substrate 3874. 9/11/2024. . .

Brickellia grandiflora (Hook.) Nutt.  Tasselflower Brickellbush. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Apex Gulch, Right on the edge of the trail, none seen on slopes above and below. Coll. No. 2732 of same taxon was made 30 m. to the west. Tom Schweich, with Cindy Trujillo 2405. 8/25/2021. Right beside the trail, none seen on slopes above or below. Also observed on the trail 30 m. to the west. Along the Apex Gulch Trail, 1.54 km. west of the Apex Gulch trailhead, 6.42 km south of the GNIS location of Golden, Tom Schweich, with Cindy Trujillo 2732. 25 Aug 2021. ( Golden KHD00075265^‡ OBI183783^‡ ) .

- Heritage Square, In partial shade and very rocky soil. South Bank of Apex Creek, W by SW of archeological project of peabody musuem, (Harvard U) and W of Magic Mtn Amusement park. 13N 0481717E 4395926N. Ernest H. Brunquist, with Dolores Newton 130. 4 Aug 1960. ( CS37820^‡ KHD9681^‡ ) . .

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.)

- Apex Park - Northern Parcel, Grasslands below foothills scrub, collected nearby: Helianthus pumilus, Heterotheca villosa, Sphaeralcea coccinea, Linaria dalmatica, and Thinopyrum intermedium. Colorado Noxious Weed List B. Lower slopes of the Front Range foothills, northeast quadrant of Apex Park, 4.45 km. south of the GNIS location of Golden. Tom Schweich 2551. 7 Jul 2021. ( COLO2706539^‡ Golden ) .

- City of Golden Parcel 40-102-01-032, Tom Schweich 3568. 6/8/2024. .

- Kinney Run, West slope of the hogback on the east side of Kinney Run, between the Cambria Lime Kiln and Tripp Ranch, 3.22 km. south southeast of the GNIS location of Golden. Tom Schweich 1968. 6 Jul 2018. ( COLO02348563^‡ KHD00069210^‡ OBI170768^‡ UC ) .

- Magpie Gulch, Tom Schweich 3722. 6/26/2024. .

- North Table Mountain, as ssp. macrolepis 1311. 1311. Kilburn, Paul D., and Sally L. White, 1992 .

- Schweich Hill, Determination tentative. Tom Schweich 1526. 3/27/2017. Colorado Noxious Weed List B. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue. Southwestern slope, probably in the revegetated zone. Tom Schweich 1711. 14 Jul 2017. ( KHD00065333^‡ UCR ^‡ ) .

- South Table Mountain, S. Table Mountain, locally abundant at base of seeping lava cliff. 13N 0483373E 4399567N. Loraine Yeatts 645. 3 Jul 1983. ( COLO00053728^‡ KHD19330^‡ ) .

- Stonebridge Homeowners Association, Tom Schweich 3294. 6/21/2023. .

- Tin Cup Ridge, Tom Schweich 1757. 6/30/2019. . .

Carthamus lanatus L.  Wooly Distaff Thistle. Weed: CO DofA, List: Watch. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- South Table Mountain, occasional on dry hillside w/ Snakeweed, Bush Sunflower and Artemesia ludoviciana. Suth Table Mtn on unmarked, unnamed trail accessed from 19th St in City of Golden to base of mtn. Collection site located about 100 yds from tralhead. NAD27. 13 0482145E 4399989N. Stanley Smookler 504. 4 Aug 2009. ( KHD46919^‡ ) . .

Centaurea diffusa Lam.  (Syn: Acosta diffusa (Lam.) Soja' k ) Diffuse Knapweed. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Biennial/Perennial herb, to 50 cm.; Leaves, cauline, alternate, 30 mm. × 12 mm. wide, pinnately lobed, much reduced and entire above, spine-tipped, margins not spiny; Inflorescence, heads borne singly, flowers of one kind; Involucre, 10 mm.; Phyllaries, 4+ series, graduated, 3.5-10.0 mm., all spine tipped, outer and middle with marginal fringe spines; Receptacle, flat, epaleate, bristly; Disk flowers, inner bisexual, Corolla, tube 7.5 mm. + lobes 3 mm., white; Pappus, 0, or very thin ring of scales. Described from Coll. No. 1233, 20 Jul 2015.

- Dakota Ridge, Tom Schweich 1719. 6/14/2019. .

- Magic Mountain, Tom Schweich 1646. 4/18/2018. .

- North Table Mountain Park, Colorado Noxious Weed List B species. Northern portion of North Table Mountain, 205 m east of radio tower, 3.3 km north northeast of the GNIS location of Golden. Tom Schweich 1233. 20 Jul 2015. ( CDA0050040^‡ JCOS s.n. KHD 00062051^‡ UC UCR267458^‡ ) .

- Schweich Hill, Tom Schweich 1544. 5/2/2017. .

- South Table Mountain, On N. side of road with Phlox hoodii, P. longifolia, Castilleja chromosa, Alyssum desertorum, Cympoteris bulbosus, C, purpurescens, Lomatium grayi, Atriplex confertifolia, Trifolium gymnocarpum, Seriphidium vaseyanum, scattered Juniperus osteosperma S. Table Mt.; on mesatop near old road. 13N 0484100E 4399700N. Loraine Yeatts 801. 20 Aug 1983. ( COLO 00026658^‡ KHD19331^‡ ) . [ Both KHD vouchers of this collection carry the same herbarium ascension number. ]

- Tin Cup Ridge, One of three collections made here. This one has purple flowers; the others have white flowers. 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. Tom Schweich, with Cindy Trujillo 2676.1 10 Aug 2021. ( Golden ) One of three collections made here; most have white flowers, some have purple flowers. 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. Tom Schweich, with Cindy Trujillo 2676.2 10 Aug 2021. ( Golden ) One of three collections made here; most have white flowers, some have purple flowers. 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. Tom Schweich, with Cindy Trujillo 2676.3 10 Aug 2021. ( Golden ) . .

Centaurea stoebe L.  (Syn: Acosta maculosa (L.) Holub , Centaurea maculosa Lam. , Centaurea stoebe L. ssp. australis (Pancic ex A.Kern.) Greuter , Centaurea stoebe L. ssp. micranthos (Gugler) Hayek ) Spotted Knapweed. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora. FNANM describes much confusion over the nomenclature of C. stoebe in the broad sense. Leaving this without infra-specific taxa.

- Mount Vernon Canyon, Roadbank. from roadbank of I-70 near Exit 58. 13N 0480398E 4394141N. Berta Anderson 961. 18 Aug 1977. ( KHD23730A^‡ KHD23730B^‡ KHD23730C^‡ ) . [ 2.5 ft. tall, many branched--8 ex caudex; receptacle hairy, involucre trubinate, only 5mm. wide 1 cm. high--achenes unflattened and fastened at end--two rows phyllaries, inner long, equal, with chartaceous edges; outer imbricated & fringed; big, woody ta ] .

Cichorium intybus L.  Common Chicory. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- North Table Mountain, 1034. 1034. Zeise, Larry Steven, 1976 . .

Cirsium .  Thistle. CalPhotos. Jepson eFlora. SEINet Taxon.

- Golden History Park, not hairy enough to be Scotch thistle Tom Schweich 2992. 4/25/2023. . .

Cirsium arvense (L.) Scop.  (Syn: Breea arvensis (L.) Lessing ) Canada Thistle. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

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).

- Colorado School of Mines Survey Field, Northern portion of the Survey Field, 2.1 km south southwest of the GNIS location of Golden. Tom Schweich 1200. 12 Jul 2015. ( CS KHD00062053^‡ UC ) .

- Deadman Gulch, South side of gulch, growing in woody shrubs. Also collected here: Epilobium hirsutum, Solanum dulcamara, and Dactylis glomerata. Near the junction of Deadman Gulch and Kinney Run, 2.28 km. south of the GNIS location of Golden Tom Schweich 2407. 31 Jul 2020. ( COLO2433993^‡ OBI186046^‡ REGIS ) .

- City of Golden Parcel 40-102-01-032, 2744. 6/10/2022. .

- DeLong Park (City of Golden), Colorado Noxious Weed List B. 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. Tom Schweich, with Carol Cameron & David Chavez 2773. 6 May 2022. ( Golden ) .

- Golden, iNaturalist Observation 182072338. Tom Schweich 3440. 9/6/2023 11:04:00 AM. .

- Magpie Gulch, Tom Schweich, with Cindy Trujillo 3083. 5/22/2023. .

- Schweich Hill, East end of parcel amid a dense infestation of smooth brome. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1701. 14 Jul 2017. ( KHD00065460^‡ UCR ^‡ ) .

- South Table Mountain, in boggy seepage area at head of gentle gully. S. Table Mt. 13N 0484100E 4399300N. Loraine Yeatts 708. 16 Jul 1983. ( COLO00051771^‡ KHD19333^‡ ) .

- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2199. 6/12/2021. .

- Tucker Gulch (lower), Tom Schweich 2906. 7/6/2022. . .

Cirsium ochrocentrum A. Gray.  Yellowspine Thistle. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Golden, Golden. Railroad track. Edmund R. Cross 20 Jul 1913. ( RM313305^‡ ) . .

Cirsium undulatum (Nutt.) Spreng.  Wavy Leaved Thistle. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Perennial thistle, to 30 cm., stout tap root; Stem, leafy, 20 cm.; Leaves, basal and cauline, basal, petiole 25 mm. + blade 180 mm. × 55 mm. wide, oblanceolate, pinnately lobed more than half-way to mid-rib, cauline, reduced above, decurrent 5 mm., 45 mm. × 14 mm. wide, lanceolate, surface, adaxial, thinly tomentose, abaxial, tomentose, margins, spiny; Head, 35 mm. × 40 mm. wide, indented around top of peduncle; Phyllaries, many (7?) series, 13 mm. × 3.5 mm. wide, + robust spine 5-6 mm., body dark dorsal ridge, outer and middle reflexed; Flowers, 1 kind; Disk flowers, 25-36 mm., corolla pink-purple; Pappus, plumose bristles; Cypsela, 5 mm., apical collar unremarkable. (Described from Coll. No. 1460, 27 June 2016).

- Apex Park - Northern Parcel, Northeast corner of parcel, lower alluvial slope. Tom Schweich, with Cindy Trujillo 2410. 9/1/2021. .

- Colorado School of Mines Survey Field, 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. 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. Tom Schweich 2370. 20 Jun 2020. ( KHD00079304^‡ OBI149313^‡ UCR ) .

- Dakota Ridge, Tom Schweich 1712. 6/14/2019. .

- Golden, Railroad track. Edmund R. Cross 20 Jul 1913. ( RM313306^‡ ) .

- Heritage Square, unshaded in medium tall grass, on a gentle, south-facing slope; rocky, well-drained soil. about 125 yds east of the archeological project of the Peabody Museum (Harvard Univ.) 13N 0481541E 4396050N. Ernest H. Brunquist 123. 28 Jul 1960. ( CS38722^‡ KHD498^‡ ) . [ CS38722 is determined C. ochrocentrum ]

- Magpie Gulch, Tom Schweich 3719. 6/26/2024. .

- North Table Mountain, 1036. 1036. Zeise, Larry Steven, 1976 1218. 1218. Kilburn, Paul D., and Sally L. White, 1992 .

- Schweich Hill, in mowed area Tom Schweich 1549. 5/2/2017. .

- South Table Mountain, S. facing mesa top slope. S. Table Mt.; near summit of S. facing mesatop slope Loraine Yeatts 646. 3 Jul 1983. ( KHD19320^‡ KHD19321^‡ ) .

- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2200. 6/12/2021. . .

Cirsium vulgare (Savi) Ten.  Bull Thistle. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon.

Leaves, adaxial face with slender appressed bristle-like prickles.

- Golden History Park, Tom Schweich 3393. 8/29/2023. .

- Magpie Gulch, Tom Schweich, with Cindy Trujillo 3106. 5/22/2023. Tom Schweich, with Cindy Trujillo 3219. 5/31/2023. .

- Stonebridge Homeowners Association, Tom Schweich 3245. 6/13/2023. . .

Conyza canadensis (L.) Cronquist.  (Syn: Erigeron canadensis (L.) Cronquist ) Canadian Horseweed. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora. Retained in Conyza per FNANM.

- DeLong Park (City of Golden), 2721. 5/26/2022. 2856. 6/30/2022. .

- Golden, disturbed ground Golden, 800 9th St. 13N 0481011E 4399988N (UTM designated just outside RMNP boundary & within Roosevelt National Forest). Jim Ratzloff 21 Jul 1976. ( KHD9883^‡ ) .

- Heritage Square, open ground ca 2 1/2 mi S of Golden. T R70W S10. Ernest H. Brunquist 8. 14 Aug 1959. ( CS23863^‡ ) growing unshaded in undisturbed ground. about 75 yds. east of the archeological project of Peabody Museum (Harvard Univ.) 13N 0481541E 4396050N. Ernest H. Brunquist 120. 28 Jul 1960. ( KHD487^‡ KHD742^‡ ) .

- South Table Mountain, along road to quarry near mesatop S. Table Mt. 13N 0484260RE 4399600N; Loraine Yeatts 775. 9 Aug 1983. ( COLO00062232^‡ KHD19158^‡ ) . .

Coreopsis tinctoria Nutt.  Golden Tickseed. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- South Table Mountain, lava capped mesa in Denver Formation. Roadside at Quaker Rd. gate, S Table Mt. 13N 0482564E 4400611N. Loraine Yeatts 944. 4 Jul 1984. ( CS79394^‡ KHD20384^‡ ) In dried clayey mud of small depression bounded by mesatop grassland; w/ Critesion jubatum, Alyssum parviflorum, Artemisia ludoviciana, Anisantha tectorum ...; a few plants locally & occasional in similar habitats. Middle lava flow of Tertiary Table Mt. shoshonite, in Denver Formation. South Table Mt., NREL property on S. side of mesatop. middle lava flow of Tertiary Table Mt. shoshonite, in Denver Formation. UTM: 12N0484762E 4899105N Loraine Yeatts, with Maureen O'Shea-Stone 4605. 25 Jun 2001. ( COLO00568923^‡ ) . .

Crepis occidentalis Nutt.  (Syn: Psilochenia occidentalis (Nutt.) Nutt. ) Largeflower Hawksbeard. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Perennial, herb, to 25 cm., taprooted; Stem, green, tomentose, glandular, no bristles; Leaves, basal and cauline, alternate, petiole 20 mm. + blade 56 mm. × 17 mm. wide, reduced distally, pinnately lobed nearly to mid-rib, segments deltoid, tomentose, glandular; Inflorescence, heads #3 per stem, showy, >leaves; Peduncles, 23 mm.; Involucre, 12 mm. × 12 mm. wide, cyindric, tomentose; Phyllaries, 2 graduated series, 3.5 mm. &tmes; 2 mm. wide, deltoid, 12.5 mm. × 3 mm. wide, lanceolate, ±flat, tomentose, gland-tipped black bristles evenly distributed; Receptacle, epaleate; Ray flowers (ligules), many, tube 6 mm. + blade 12.5 mm. × 2.4 mm. wide, yellow; Pappus, 9 mm. well-developed, bristles, ±equal, smooth; Fruit, 2 mm. × 1.3 mm. wide, brown, glabrous. (Described from Coll. No. 1894, 28 May 2018).

- Colorado School of Mines Survey Field, Chicorieae, phyllaries grayish, glandular. Subspecies costata if infraspecific names are to be applied. 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. Tom Schweich 1894. 28 May 2018. ( KHD00069231^‡ OBI147777^‡ ) .

- Eagle Ridge, in bloom Tom Schweich 3036. 5/9/2023. .

- Eagle Ridge, Tract A, Common in this field of remnant mixed-grass prairie, drier patch dominated by Artemisia ludoviciana, stiff clay soil. Subsp. costata if infraspecific names are to be applied. City-owned parcel north of “Eagle Ridge” between CSM Survey Field and US Highway 6, about 50 m. northwest of the Kinney Run Trail, 2.38 km. (geodesic) south of the GNIS location of Golden Tom Schweich 2978. 19 Jun 2023. ( Golden ) .

- City of Golden Parcel 40-102-01-032, Subspecies costata (A. Gray) Babcock & Stebbins, if infraspecific names are to be applied. Small (1.7 ac) parcel deeded to the city as part of the Tripp Ranch development, sandwiched between Jefferson County Open Space, Stonebridge HOA open space, and private residences, accessed from Crawford St., 4.41 km. south of the GNIS location of Golden. Tom Schweich 2793. 10 Jun 2022. ( Golden ) .

- Golden, Dry hills. Ellsworth Bethel, with I. W. Clokey 4413. 9 Jun 1921. ( COLO00122291^‡ RM90092^‡ ) .

- North Table Mountain, 1222. 1222. Kilburn, Paul D., and Sally L. White, 1992 .

- Schweich Hill, Tom Schweich 2116. 5/16/2021. .

- South Table Mountain, On steep bank along road. Intermountain park; sagebrush and open lodgepole pine forest. S. Table Mt. along Quaker Rd. just past Golden Hills Rd. 13N 0484200E 4398800N. Loraine Yeatts 576. 16 Jun 1983. ( COLO00122267^‡ KHD19321^‡ ) .

- Stonebridge Homeowners Association, Tom Schweich 3244. 6/13/2023. .

- Tin Cup Ridge, 2854. 6/28/2022. . .

Cyclachaena xanthiifolia (Nutt.) Fresen.  (Syn: Iva xanthiifolia Nutt. ) (=Euphrosyne xanthiifolia (Nutt.) A.Gray) Carelessweed. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora. Cyclachaena xanthiifolia is thought to be native to North American prairies and is evidently adventive east of the Mississippi River and in western states.

- Deadman Gulch, Also seen around the edge of the pond and along the Kinney Run Trail nearly to Eagle Ridge Drive. The pond and dam were reconstructed in late 2016 so these would have established here since then. Along Deadman Gulch (Kinney Run), between US Highway 6 and Eagle Ridge Drive, collected at the edge of the concrete of the retention pond dam, 3.18 km. south of the GNIS location of Golden. Tom Schweich 2423. 17 Aug 2020. ( COLO2433910^‡ KHD00073442^‡ OBI186037^‡ ) .

- Golden, Garden weed. Golden Tom Fennell 19 Aug 1975. ( COLO00857946^‡ ) .

- Heritage Square, Open ground. 2.5 mi S of Golden. T R70W S10. H. Harrington 43. 24 Aug 1959. ( CS23860^‡ ) .

- North Table Mountain Park, On the Mesa Top Trail, just below the rim of North Table Mountain. Tom Schweich, with Cindy Trujillo 2388. 8/13/2021. .

- South Table Mountain, South Table Mountain; on both sides of Quaker Rd. above Golden Hills Rd. 13N 0484300E 4399100N. Loraine Yeatts 815. 29 Aug 1983. ( COLO00062828^‡ KHD19407^‡ ) . .

Dieteria bigelovii (A. Gray) D. R. Morgan & R. L. Hartman.  (Syn: Machaeranthera b. (A. Gray) Greene , Machaeranthera varians Greene ) Bigelow's Tansy Aster. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Perennial herb, to 60 cm.; Stem erect, stipitate-glandular, more dense above; Leaves, basal, unknown, cauline, alternate, sessile, 50 mm. × 4-5 mm. wide, reduced above, lance-linear, spinulose toothed; Inflorescence, panicle, heads borne singly on pedicels 10-20 mm.; Involucre, 8 mm. × 12 mm. wide; Phyllaries, 5+ series, imbricate, chartaceous below, green and stipitate-glandular above, tips, acuminate, reflexed; Receptacle, epaleate; Flowers of 2 kinds; Rays, fertile, corolla, tube 4.5 mm. + laminae 10 mm. × 1.5 mm. wide, spatulate, blue; Disk flowers, corolla, 6 mm., yellow; Pappus, capillary bristles, 6 mm.; Cypsela, 3 mm., hairy. Described from Coll. No. 1299, 23 Sep 2015.

- Apex Gulch, Dry creek bed. Bed of Apex Creek, about 1 mile west by southwest of the archeological project of the Peabody Museum. 13N 0480091E 4395882N. Ernest H. Brunquist, with Dolores Newton 133. 4 Aug 1960. ( KHD8167^‡ ) .

- Golden, Highplains, Golden, Jefferson Co. Lois S. Ehlers, with J. H. Ehlers 778. 16 Sep 1922. ( EMC2276^‡ ) . [ Determined Machaeranthera varians Greene. ]

- 407 Garden Street, WNS seed, as Machaeranthera bigelovii 2687. 1/1/2019. .

- Grampsas North, 3911. 12/7/2024. .

- South Table Mountain, South Table Mountain; Along road to Castle Rock on mesa top. 13N 0482700E 4400400N. Loraine Yeatts 844. 13 Sep 1983. ( BRY264970^‡ COLO00106120^‡ KHD19402^‡ ) . [ BRYV264970 is annotated "Machaeranthera canescens var. glabra, > var canescens, B. L. Turner 1986." ]

- 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. Tom Schweich 1299. 23 Sep 2015. ( JCOS s.n. KHD00061539^‡ UC UCR267492^‡ ) . .

Dieteria canescens (Pursh) Nutt.  (Syn: Machaeranthera c. (Pursh) A. Gray ) Hoary Tansyaster. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Golden, Golden. 13N 0481266E 4400112N. Ellsworth Bethel 365. 14 Oct 1916. ( KHD10014^‡ ) United States, Colorado, Jefferson County, Golden, off Highway 6. Sherman Lambert 73. 24 Jun 1978. ( UTEP13411^‡ UTEP13412^‡ UTEP13413^‡ ) United States, Colorado, Jefferson, Golden W. W. Calkins ? 874. 20 Sep 1878. ( BDI ) . .

Dyssodia papposa (Vent.) Hitchc.  Fetid Marigold. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Annual, to 15 cm., tap-rooted, most surfaces with scattered 0.4 mm. elliptical brown oil glands; Leaves, cauline, 28 mm. × 12 mm. wide, reduced above, pinnafitid, ±sessile; Heads, borne singly on leafy stems; Phyllaries, 2+ graduated series, 3 mm. × 1 mm. wide, lanceolate, to 6 mm. × 2.7 mm. wide, elliptic, 5-9 brown oil glands; Receptacle, epaleate; Flowers, 1 kind; Disk flowers, 2.8 mm., yellow; Pappus, scales, dissected to appear to be bristles, 3 mm.; Cypsela, 4 mm., black. (Described from Coll. No. 1540, 18 August 2016.)

- North Table Mountain Park, On edge of private horse pasture. 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. Tom Schweich 1540. 16 Aug 2016. ( KHD00065750^‡ ) .

- South Table Mountain, Along road near south rim of mountain. Collection by Environmental Science & Engineering, Englewood, Colorado. S. Table Mountain, along road near S rim of mountain. 13N 0483567E 4400080N. Janet L. Wingate 2735. 30 Aug 1983. ( KHD22199^‡ ) overgrown road up gentle south facing slope. South Table Mountain; in center of overgrown road up gentle south facing slope near mesa top. 13N 0484100E 4399700N. Loraine Yeatts 819. 29 Aug 1983. ( COLO00063586^‡ KHD19322^‡ ) . .

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. Golden Flora.

- Apex Park - Northern Parcel, Tom Schweich 1877. 5/26/2020. Mixed foothills shrubland and grassland, also seen or collected here: Artemisia dracunculus, Senecio spartioides (in bud, no flowers), Solidago missouriensis, and Xanthisma spinulosum. 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. Tom Schweich 2431. 19 Aug 2020. ( CS JCOS s.n. KHD00073458^‡ OBI186032^‡ ) .

- Colorado School of Mines Survey Field, Tom Schweich 2537. 4/29/2022. 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. 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. Tom Schweich 3226. 17 Sep 2023. ( Undist. ) .

- City of Golden Parcel 40-102-01-032, 2780. 6/10/2022. .

- DeLong Park (City of Golden), many seedlings Tom Schweich 2602. 5/12/2022. .

- Golden, Roadside. Junction of Colorado highway 93 and road to Golden Gate Park. Barry C. Johnston, with W.A. Weber 1890. 26 Sep 1978. ( COLO00056119^‡ MO3312383^‡ ) North face of roadside embankment. Donor: Herbarium, University of Colorado, Denver Center. Hwy 58 west of intersection with Hwy 6. 13N 0479210E 4399704N. Gary Secora 14. 20 Sep 1977. ( KHD40954^‡ ) Roadside growing along roadside at junction of Highway 6 and Highway 58 west of Golden. 13N 0479795E 4400376N. Janet L. Wingate 1186. 12 Sep 1981. ( KHD170^‡ ) Illinois Street at alley between 4th and 5th Streets, 1 km northwest of the GNIS location of Golden. Tom Schweich 1063. 17 Sep 2014. ( CAS UC2045981^‡ ) 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. Tom Schweich 1064. 17 Sep 2014. ( UCR266868^‡ ) .

- Golden History Park, common, throughout the park Tom Schweich 2973. 4/25/2023. .

- 407 Garden Street, 2713. 2713. .

- Grampsas North, 3926. 12/7/2024. .

- Kinney Run South, 3977. 1/3/2025. .

- 17000 block of Rimrock Drive, 3839. 9/10/2024. .

- South Illinois Open Space, 3940. 12/20/2024. .

- Heritage Square, open ground. ca 2 1/2 mi S of Golden. T R70W S10. Ernest H. Brunquist 69. 26 Sep 1959. ( CS37486^‡ ) .

- Kinney Run, Tom Schweich 1636. 7/6/2018. .

- Magic Mountain, Tom Schweich 1663. 4/18/2018. .

- North Table Mountain, as Chrysothamnus n. 1033. 1033. Zeise, Larry Steven, 1976 as Chrysothamnus n. 1340. 1340. Kilburn, Paul D., and Sally L. White, 1992 .

- Schweich Hill, Tom Schweich 1501. 3/27/2017. Collected nearby: Lomatium orientale, Mertensia lanceolata, Colutea arboescens, Psoralidium tenuiflorum, and Viola nuttallii. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 2.31 km. north northwest of the GNIS location of Golden (on 12th Street near the Buffalo Rose Saloon). Tom Schweich 2229. 12 Sep 2019. ( CDA0052315^‡ COLO2433647^‡ EIU KHD00074458^‡ OBI186063^‡ REGIS UCR ) Tom Schweich 3044. 5/21/2023. .

- South Table Mountain, roadside. uncommon, S. Table Mt.; along Quaker Rd. 13N 0484300E 4399200N. Loraine Yeatts 843. 13 Sep 1983. ( COLO00056044^‡ KHD19332^‡ ) .

- South Table Mountain Park, with var. nauseosa 3871. 9/11/2024. .

- Stonebridge Homeowners Association, Tom Schweich 3248. 6/13/2023. Tom Schweich 3295. 6/21/2023. Tom Schweich, with Ann Norton 2201. 6/12/2021. . .

Ericameria nauseosa (Pall. ex Pursh) G. I. Nesom & G. I. Baird var. nauseosa.  (Syn: Chrysothamnus plattensis Greene ) Rubber Rabbitbush. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Apex Gulch, Beside the Apex trail, 160 m. west of Kinney Run Trail, possibly revegetated. Tom Schweich, with Cindy Trujillo 2392. 8/25/2021. .

- Apex Park - Northern Parcel, Tom Schweich, with Cindy Trujillo 2600. 5/10/2022. .

- Eagle Ridge, Tom Schweich 1980. 7/24/2020. With Rhus trilobata, Cercocarpus montanus, Pediomelum tenuiflorum, Linum lewisii, and dried-up grasses. See also Coll. No. 2440., same taxon and location, 11 days later. Low on the north and east slopes of “Eagle Ridge,” an informally named hogback between US Highway 6 and Deadman Gulch (Kinney Run), 3.26 km. south of the GNIS location of Golden. Tom Schweich 2421. 17 Aug 2020. ( KHD00073444^‡ ) See also Coll. No. 2421, same taxon and location, 11 days earlier. North slope of “Eagle Ridge,” an informally named hogback between US Highway 6 and Deadman Gulch (Kinney Run), just below the Cercocarpus montanus, 3.26 km. south of the GNIS location of Golden. Tom Schweich 2440. 28 Aug 2020. ( CAS COLO2433845^‡ OBI186034^‡ UCR297671^‡ ) .

- DeLong Park (City of Golden), iNaturalist Observation 234174316. Tom Schweich 3820. 8/6/2024. .

- Golden, Morrison to Golden Ellsworth Bethel, with W. W. Eggleston 6365. 2 Oct 1910. ( NY2039509^‡ ) Hills near Golden. J. H. Ehlers 8535. 18 Sep 1942. ( COLO00056739^‡ ) .

- Grampsas North, 3899. 12/7/2024. .

- 17000 block of Rimrock Drive, 3838. 9/10/2024. .

- Kinney Run, with var. graveolens, Ambrosia psilostachya, and Rhus trilobata. Tom Schweich 1986. 7/31/2020. .

- South Table Mountain, a lava capped mesa in the Denver Formation; gentle slope draining into NE. facing gulley; with C. n. ssp. graveolens. MVNC S-U, 25-27, S. Table Mt.; mesatop slope draining into NE. facing gully overlooking Rolling Hills Country club. 13N 0484100E 4400300N. Loraine Yeatts 1085. 18 Sep 1984. ( COLO00056713^‡ KHD20730^‡ ) on the edge of the Lubahn Trail Tom Schweich 3326. 7/7/2023. .

- South Table Mountain Park, 3868. 9/11/2024. with var. graveolens 3870. 9/11/2024. With Grindelia squarrosa, Opuntia macrorhiza, and Agropyron cristatum. Tom Schweich 3370. 11 Sep 2024. ( Undist. ) .

- Stonebridge Homeowners Association, Tom Schweich 3247. 6/13/2023. Tom Schweich 3296. 6/21/2023. . .

1a. Leaves 1-4 times ternately or palmately dissected into linear segments; plants with a stout, branching caudex … E. compositus

1b. Leaves entire or coarsely toothed, sometimes with a few leaves 3-lobed to pinnatifid, mostly basal or not … 2

2a. Pappus of the ray and disk flowers unlike, that of the disk flowers of long bristles and short outer setae, that of the ray flowers only of short setae and lacking long bristles; heads small (the involucre 2-5 mm. high and 5-12 mm. wide), several to numerous in an open wide-branching corymbiform cluster; rays white … E. strigosus var. strigosus

2b. Pappus of the ray and disk flowers alike; heads and rays various, usually not in an open, wide-branching corymbiform cluster … 3

3a. Stems with appressed or ascending hairs (at above the middle), not glandular; at least some branches from the lower half of the main stems developing into long, trailing leafy stoloniferous branches … E. flagellaris

3b. Stems with spreading or tangled (pointing in all directions) hairs or mostly glandular; branches developing into stoloniferous branches or not … 4

4a. Leaves more or less densely glandular, or occasionally obscurely so and the leaves stiffly ciliate, mostly or all basal with a few linear linear, reduced stem leaves present; stems glandular and also hirsute with spreading hairs (or at least above); rays usually purple or blue … E. vetensis

4b. Leaves variously hairy to glabrate, if glandular then only the upper stem leaves glandular; stems variously hairy to glabrate, or sometimes glandular or viscid under the heads; rays various … 5

5a. Leaves and stems densely pubescent with spreading, hirsute hairs mostly 1 mm. long, especially on the petioles, leaves mostly less than 3 mm. wide; heads more or less hemispheric; rays only white; outer pappus of inconspicuous bristles … E. pumilis

5b. Leaves and stems unlike the above in all respects; heads and rays various … 6

6a. Branches from the lower half of the main stems often developing into long, trailing leafy stoloniferous branches; basal leaves usually present at flowering time … E. tracyi

6b. Stems usually erect and without leafy stoloniferous branches, often branched above the middle; basal leaves usually withered and not present at flowering time … E. divergens

Key abstracted mostly from Ackerfield (2015).

Erigeron compositus Pursh.  (Syn: E. compositus Pursh var. discoideus A. Gray , E. compositus Pursh var. glabratus Macoun ) Cutleaf Daisy. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora. Described as Erigeron compositum by Pursh (1814) from a Lewis Clark collection.

Perennial herb, from woody caudex, 10 cm.; Leaves, basal, petiole, 18-22 mm., 5 mm. × 6 mm. wide, ternately divided, glandular, straight multicellular hairy; Inflorescence, 1 head per stem; Peduncles, 40 mm., glandular, short straight spreading hairs; Involucre, 5 mm. × 10 mm. wide; Phyllaries, 2+ series, 6 mm. × 1.3 mm. wide, outer phyllaries glandular hairy, green mid-rib and distally, chartaceous then scarious toward margin, tip, acute, purplish; Receptacle, epaleate; Flowers, of 2 kinds; Ray flowers, #25, tube 1.8 mm. + blade 5.3 mm. × 1 mm. wide, white, fertile; Disk flowers, many, tube 3.5 mm. + lobes 0.3 mm., expanding gradually, yellow, open; Pappus, well-developed, bristles, 3.5-3.8 mm., ±equal, capillary; Cypsela, 2.2 mm. × 0.6 mm. wide, angled, brown, hairy. (Described from Coll. No. 1901, 31 May 2018).

- Lookout Mountain, Gift from Colorado College, 1992. Herbarium of Edward Tatnall, of Brandywine, Delaware (see Harshberger, J.W. 1899. Botanists of Philadelphia and their work, p. 225-226). Mountains near Golden City. E. L. Greene Jun 1870. ( COLO00862102^‡ ) On dry, rocky slope in open pine forest. Lariat Trail, Lookout Mountain. Hansford T. Shacklette 6673. 19 May 1962. ( COLO00857763^‡ COLO00857771^‡ ) . .

Erigeron divergens Torr. & A. Gray.  Spreading Fleabane. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

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).

- Dakota Ridge, Tom Schweich 1692. 6/14/2019. .

- Heritage Square, open field. [Carex fen in old silted in beaver pond, along trail below open Pinus contorta forest & above 1st large active beaver pond; ] -- these notes are in error -- Ed. ca 2 1/2 mi S of Golden. T R70W S10. Verbatim Coordinates: 13N 0477200E 4387002N Ernest H. Brunquist 46. 25 Aug 1959. ( CS23864^‡ KHD9970^‡ ) plants growing in open grassy field. about 300 yds west of the archeological project of Peabody Museum (Harvard Univ.) 13N 0481525E 4396144N. Ernest H. Brunquist 33. 20 Aug 1959. ( CS23918^‡ KHD9972^‡ ) .

- Magpie Gulch, Tom Schweich, with Cindy Trujillo 3075. 5/22/2023. .

- North Table Mountain, 1050. 1050. Zeise, Larry Steven, 1976 1315. 1315. Kilburn, Paul D., and Sally L. White, 1992 .

- North Table Mountain Park, In thin soils or cracks of basalt caprock, near the edge of prairie dog town. 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 Tom Schweich 1489. 13 Jul 2016. ( CS JCOS s.n. KHD00063464^‡ UC ) 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. Tom Schweich 1879. 23 May 2018. ( CAS JCOS s.n. KHD00069211^‡ OBI ) .

- Schweich Hill, West-central part of hill, southwest slope. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1668. 16 Jun 2017. ( KHD00065482^‡ UCR ^‡ ) Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 2.27 km. northwest of the GNIS location of Golden. Tom Schweich 2092. 26 Jun 2019. ( KHD00070525^‡ ) .

- South Table Mountain, in soil pocket, S. Table Mt.; on top of Castle Rock. 13N 0482000E 4400400N. Peter G. Root 8311. 1 Jul 1983. ( KHD19410^‡ ) .

- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2202. 6/12/2021. .

- Vidler's Gulch, Stony, south facing slope. Vidler's Gulch, Golden. Hazel M. Schmoll 724. 29 Jun 1923. ( COLO00067181^‡ ) . .

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).

- Colorado School of Mines Survey Field, Small patch. Tom Schweich 1474. 7/6/2016. .

- Kinney Run, Thin vegetation on sandstone. On the west limb of a small hogback, about 2/3 of the way up from Kinney Run to the crest of the hogback, 3.1 km. south of the GNIS location of Golden. Tom Schweich 1829. 16 May 2018. ( CAS COLO02347615^‡ CS UCR ^‡ ) .

- Mount Vernon Canyon, Vernon Canon. 13N 0479307E 4394636N. Unknown 4 Oct 1925. ( KHD8106^‡ ) .

- North Table Mountain Park, Expected. Tom Schweich 1570. 6/12/2017. .

- Stonebridge Homeowners Association, peduncle hairs appressed Tom Schweich 3246. 6/13/2023. . .

Erigeron pumilus Nutt.  Shaggy Fleabane. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Eagle Ridge, On mesa slope in foothills of the Front Range. Transferred from USGS Herbarium, Denver, CO (2005). Foothills of the Front Range, at junction of US 6 and road to Morrison. Hansford T. Shacklette 5889. 27 Jun 1959. ( COLO528406^‡ ) On mesa slope in foothills. Foothills of the Front Range, at junction of US 6 and road to Morrison, about 1 mile east of Golden. Hansford T. Shacklette 5890. 27 Jun 1959. ( COLO528414^‡ ) .

- South Table Mountain, 7.5' Golden quad,S. Table Mountain, a few plants along S. side of road to Castle Rock. 13N 0482800E 4400252N. Loraine Yeatts 587. 24 Jun 1983. ( COLO00083832^‡ KHD19324^‡ ) . [ “outer pappus of bristles” in annotation by Weber suggests var. intermedius. ] .

Erigeron strigosus Muhl. ex Willd.  (Syn: Stenactis strigosa (Muhl. ex Willd.) DC. ) Prairie Fleabane. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Golden, along the edge of a dense cattail marsh, located west of McIntyre St. Associated plants include Sandbar Willow, Sedges and Cattail. Outskirts of the City of Golden: 1/4 to 1/2 mile north of 44th Ave along McIntyre St. 13N 0485091E 4403250N. Stanley Smookler 348. 6 Aug 2003. ( KHD40079^‡ ) . .

Erigeron tracyi Greene.  (Syn: E. cinereus A. Gray , E. colomexicanus A. Nelson , E. divergens Torrey & A. Gray var. cinereus A. Gray ) Running Fleabane. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Perennial herb, 20-25 cm., caudex simple (not stout) non-rhizomatous, hairy throughout, with hairs 0.2-0.4 mm. spreading in all directions, glandular at high magnification; Stem, some with prior year's branches assumed to have been stoloniferous; Leaves, basal and cauline, basal, petiole, to 26 mm. + blade oblanceolate 8-12-20 mm. × 2-4-5.5 mm. wide, short hairy and glandular (especially visible at high magnification), margin entire, tip acute, some withered at flowering time, cauline, ±sessile, reduced or not well-developed above, but up to 32 mm. × 1.8 mm. wide; Peduncle, spreading to descending multicellular hairs with clear crosswalls, slightly pustular (maybe) or glandular at high magnification; Phyllaries, in 2+ ±equal series, but not distinctly imbricate, 3-4.5 mm. × 0.7 mm. wide, lanceolate, green center, light margins, spreading hairy; Receptacle epaleate; Flowers, 2 kinds; Ray flowers, cypsela 0.5 mm. + tube 2 mm. + ligule 4 mm. × 0.3-0.6 mm. wide = 6.5-7 mm. × 0.8 mm. wide, fertile, tip rounded, white & pink fading purple; Disk flowers, yellow; Pappus, ray and disk alike, inner, few capillary bristles, 4 mm., outer, short crown of scales, double pappus not particularly disgnostic in Erigeron. The most common form of E. tracyi is perhaps (speculative) a stabilized, apomictic hybrid between E. flagellaris and E. divergens (FNANM). Described from Coll. No. 1133, 9 Jun 2015 and Coll. No. 1337, 11 May 2016.

- Apex Park - Northern Parcel, 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. 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 Tom Schweich 2298. 26 May 2020. ( CAS COLO2433787^‡ JCOS s.n. KHD00073449^‡ UC ) Also collected nearby: Ribes cereum, Prunus virginuana, Astragalus flexuosus, Lupinus argenteus, Linum lewisii, Bromus japonicus, and Nassella viridula. 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. Tom Schweich 2345. 10 Jun 2020. ( CDA0053749^‡ CS EIU JCOS s.n. KHD00073448^‡ ) .

- 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. Tom Schweich 1891. 28 May 2018. ( CS EIU OBI ) .

- City of Golden Parcel 40-102-01-032, 2765. 6/10/2022. .

- Golden, Found in both open ground and in area shaded by willow species; associated plants: Phacelia heterophylla and Sedum lanceolatum. Western outskirts between Clear Creek and 8th St. near Brianwood Inn. 13N 0480599E 4400492N. Stanley Smookler 40. 10 May 1992. ( KHD30410^‡ ) .

- 407 Garden Street, Tom Schweich, with Cathy Hansen-Stamp 2631. 5/16/2022. .

- Magpie Gulch, Tom Schweich 3727. 6/26/2024. .

- North Table Mountain, Signed as Jefferson County Open Space, parcel owned by City of Golden. Lower south slopes of North Table Mountain, 100 m. east of the end of Peery Parkway, 1.2 km. north northeast of the GNIS location of Golden. Tom Schweich 1337. 11 May 2016. ( CAS JCOS s.n. KHD00063981^‡ UCR278798^‡ ) .

- North Table Mountain Park, Very thin soil on volcanic caprock of mesa. Mesa top, southeast portion of North Table Mountain, 3.3 km northeast of the GNIS location of Golden. Tom Schweich 1133. 9 Jun 2015. ( JCOS s.n. KHD56940^‡ UC UCR265984^‡ ) .

- Schweich Hill, South side of hill, near the informal “bench.” Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1612. 15 May 2017. ( CDA0050100^‡ COLO02347862^‡ KHD00065379^‡ ) .

- South Table Mountain, among rocks on SW facing slope. South Table Mountain. 13N 0482700E 4400200N. Janet L. Wingate 2443. 16 Jun 1983. ( KHD14314^‡ ) a lava capped mesa in the Denver Formation; on W. facing slope along tr. in open area between shrubs S. Table Mt.; on W. facing slope along tr. below Castle Rock. 13N 0482100E 4400100N. Loraine Yeatts 932. 25 Jun 1984. ( COLO00069302^‡ CS85541^‡ KHD20725^‡ KHD20934^‡ ) W. facing slope. S. Table Mt. Below Castle Rock along trail. UTM: 822002. Mary E. Edwards 436. 1 Jun 1983. ( COLO00064923^‡ ) .

- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2203. 6/12/2021. .

- Tin Cup Ridge, Mixed grasses and forbs. Collected with Achillea millefolium, Erigeron tracyi, Heterotheca villosa, and Medicago lupulina. 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. Tom Schweich 2100. 30 Jun 2019. ( JCOS s.n. KHD00070535^‡ OBI183227^‡ REGIS ) .

- Tucker Gulch (lower), Tom Schweich 2904. 7/6/2022. . .

Erigeron vetensis Rydb.  Early Bluetop Fleabane. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Perennial, to 12 cm., sparse multicellular hairs with clear crosswalls to 0.8 mm., plus very small (<0.1 mm.) peg-like glands, throughout; Leaves, basal, petiole 45 mm. + blade 65 mm. × 5 mm. wide, narrowly oblanceolate, cauline, reduced in size, #4-5, sessile, 15 mm. × 2.1 mm. wide, oblanceolate; Inflorescence, scapose, 21 cm.; Heads, mostly borne singly; Involucre, 5 mm. × 11 mm. wide; Phyllaries, subequal, in 2 rows, 5 mm. × 0.7 mm. wide, margins not ciliate, tip acuminate; Flowers of 2 kinds, Ray flowers, fertile, corolla, 11 mm. × 1.6 mm. wide, ±white, fading blue; Disk flowers, corolla, 4.0 mm., yellow, lobes triangular, style branch appendages triangular; Pappus, short (0.3 mm.) and long (2.2 mm.) capillary bristles; Cypsela, 1.5-1.6 mm. (Described from Coll. No. 1421, 10 Jun 2016).

- Golden, dry hills. Golden-Central City. R Duthie & I Clokey 9 Jun 1920. ( CS21177^‡ ) Base of Lookout Mountain. 13N 0480336E 4399274N. Unknown 1 Jun 1913. ( KHD8098^‡ ) .

- Lookout Mountain, Golden: Lookout Mountain. Earl L. Johnston 775.1 4 Jul 1915. ( RM482748^‡ ) On dry, rocky slope in open pine forest. Lariat Trail, Lookout Mountain. Hansford T. Shacklette 6674. 19 May 1962. ( COLO00857797^‡ COLO00857805^‡ ) . .

Gaillardia aristata Pursh.  Blanketflower. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora. Described by Pursh (1814) from a Lewis & Clark collection.

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.

- 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. Tom Schweich 1205. 12 Jul 2015. ( KHD00062158^‡ ) .

- Dakota Ridge, Foothills shrubland, mostly Cercocarpus montanus; also collected here: Hypericum perforatum; nearby: Campanula rotundifolia, and Muhlenbergia montana. Hogback at the northern city limits of Golden, nearly to the top of the west slopes. 4.40 km. north northwest of the GNIS location of Golden. Tom Schweich 2356. 12 Jun 2020. ( UC ) .

- Deadman Gulch, East-facing grassy slope. Deadman Gulch is often referred to by the locally euphemistic name of “Kinney Run.” High plains between US Hwy 6 and Lookout Mountain, about 150 m. northwest of the Deadman Gulch undercrossing of US Hwy 6, 2.3 km. south of the GNIS location of Golden. Tom Schweich 1425. 15 Jun 2016. ( CS UCR278002^‡ ) .

- Golden, Cobble soil. Flat exposure. Golden. F.A. Branson 10 Jun 1958. ( COLO00857813^‡ ) .

- Lookout Mountain, Dry mountain slopes. Denver Mountain Parks near Golden. J. H. Ehlers 8104. 5 Jul 1941. ( COLO 00089094^‡ ) .

- North Table Mountain, 1055. 1055. Zeise, Larry Steven, 1976 1236. 1236. Kilburn, Paul D., and Sally L. White, 1992 .

- Schweich Hill, Top of hill, center of parcel. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1665. 16 Jun 2017. ( KHD00065494^‡ OBI124848^‡ ) .

- South Table Mountain, A lava capped mesa in the Denver Formation. West of Quaker Road, North of Golden Hills Road, in meadow on North side of hill 6020. 13N 0483567E 4400080N. Loraine Yeatts 1268. 5 Jun 1986. ( COLO00088997^‡ KHD24220^‡ ) .

- Tin Cup Ridge, 2853. 6/28/2022. . .

Galinsoga parviflora Cav.  Gallant Soldier. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Golden, Weed of disturbed ground 611 Water Street, Golden. 13N 0480288E 4400799N. Jim Ratzloff 22 Jul 1976. ( KHD10344^‡ ) . .

Gnaphalium uliginosum L.  Marsh Cudweed. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- South Table Mountain, Ground cover in patches. Unsure if P. pensylvanica in the associated taxa is Potentilla or Prunus. South Table Mt., a lava capped mesa in the Denver Formation; flat quarry area, recently dried with seedling cottonwoods, chenopodium, cyperus lava capped mesa in Denver formation. 13N 0484300E 4400000N. Loraine Yeatts 1072. 18 Sep 1984. ( COLO00089557^‡ KHD20728^‡ ) . .

Note: It is important to note presence or absence of a basal rosette when collecting.

Grindelia squarrosa (Pursh) Dunal.  Curlycup Gumweed. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora. Described as Donia squarrosa by Pursh (1814) from a Lewis & Clark collection.

- Apex Park - Northern Parcel, 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. 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. Tom Schweich 2384. 17 Jul 2020. ( CDA0053763^‡ COLO2434439^‡ JCOS s.n. UC ) .

- Dakota Ridge, Foothills grassland, below any significant concentration of shrubs, also collected here: Rhus trilobata, Tragia ramosa, Eriogonum alatum, and Gutierrezia sarothrae. Northwesternmost city limits of Golden, west side of Dakota Ridge (North Hogback), about 1/2 of the way up the west slope from Cressmans Gulch, 2.66 km. north northwest of the GNIS location of Golden. Tom Schweich 2399. 29 Jul 2020. ( CS EIU ) .

- City of Golden Parcel 40-102-01-032, 2787. 6/10/2022. .

- Golden History Park, Tom Schweich 3028. 5/5/2023. .

- Grampsas North, 3909. 12/7/2024. .

- Kinney Run South, 3965. 1/3/2025. .

- 17000 block of Rimrock Drive, 3852. 9/10/2024. .

- Kinney Run, Foothills shrubland, also collected here: Astragalus shortianus, Cynoglossum officinale, Lithospermum arvense, Scutellaria brittonii, and Toxicoscordion paniculatum. Near the junction of Deadman Gulch with Kinney Run, on a small hill that is a highly eroded hogback continued from the east side of Kinney Run, 2.37 km. south of the GNIS location of Golden. Tom Schweich 2410. 31 Jul 2020. ( CDA0053773^‡ COLO2433894^‡ OBI186043^‡ UCR ) .

- Magpie Gulch, iNaturalist Observation 184029788. Tom Schweich 3412. 9/19/2023. Tom Schweich, with Cindy Trujillo 3204. 5/31/2023. .

- North Table Mountain, 1059. 1059. Zeise, Larry Steven, 1976 1242. 1242. Kilburn, Paul D., and Sally L. White, 1992 .

- North Table Mountain Park, Gentle grassy slope above oldest lava flow. 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. Tom Schweich 1737. 15 Aug 2017. ( JCOS s.n. KHD00065318^‡ UCR ^‡ ) .

- South Table Mountain, S. Table Mountain, common on mesa top.13N 0484099E 4400109N. Loraine Yeatts 803. 20 Aug 1983. ( KHD19411^‡ ) .

- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2204. 6/12/2021. . .

Grindelia subalpina Greene.  Subalpine Gumweed. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- South Table Mountain, hardpacked clay. Along Quaker Rd, on S. Table Mountain. 13N 0483016E 4400482N. Loraine Yeatts 802. 20 Aug 1983. ( KHD19412^‡ ) . .

Gutierrezia sarothrae (Pursh) Britton & Rusby.  (Syn: G. linearifolia Lag. ) Broom Snakeweed. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora. Described as Solidago sarothrae Pursh (1814) from a Lewis & Clark collection.

Perennial, tap-rooted, to 9 cm.; Leaves, alternate, linear, 20 mm. × 1 mm. mm. wide, dotted with embedded oil glands, very few short hairs; Peduncle, 0.5-1.5 mm.; Inflorescence, some flowers with strap-shaped corollas, flowers of two kinds in same heads, Involucre, 3.5 mm. × 2.5-3.0 mm. wide, obconic, not gummy; Phyllary, 2-3 unequal series, inner folded around ovary of ray flowers, dotted with embedded oil glands, tips appressed; Receptacle, epaleate; Rays, #5, yellow; Disk, #4; Pappus, a well-developed crown of scales on both ray and disk flowers; (Described from Coll. No. 144, 3 Oct 1997: keys easily to Gutierrezia sarothrae. However, inner phyllaries are folded around ovary of ray flowers, a character not mentioned in keys or description.)

- Apex Park - Northern Parcel, Foothills grassland, with both foothills and riparian shrubland nearby, toe of small east-facing ridge with Helianthus pumilus, Artemisia dracunculus, and Koeleria maculata. 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. Tom Schweich 2429. 19 Aug 2020. ( COLO2433803^‡ CS JCOS s.n. UC ) .

- Colorado School of Mines Survey Field, Highest Great Plains mixed grass near Rocky Mountain Front Range scarp, also nearby: Senecio spartioides, Eriogonum effusum, and Cercocarpus montanus. 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. Tom Schweich 3193. 27 Aug 2023. ( Undist. ) With Bouteloua gracilis, Bromus inermis, Ambrosia psilostachya, and Helianthus pumilus. 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 Tom Schweich 3221. 17 Sep 2023. ( Undist. ) Tom Schweich 3367. 8/27/2023. .

- Dakota Ridge, Tom Schweich 1713. 6/14/2019. Foothills grassland, below any significant concentration of shrubs, also collected here: Rhus trilobata, Tragia ramosa, Eriogonum alatum, and Grindelia squarrosa. Northwesternmost city limits of Golden, west side of Dakota Ridge (North Hogback), about 1/2 of the way up the west slope from Cressmans Gulch, 2.66 km. north northwest of the GNIS location of Golden. Tom Schweich 2400. 29 Jul 2020. ( CAS CDA0053768^‡ UCR ) .

- City of Golden Parcel 40-102-01-032, 2756. 6/10/2022. .

- Golden, Rolling plains and hills. J. H. Ehlers 8345. 25 Sep 1941. ( RM492640^‡ ) Dry, disturbed, grazed. [Coordinates look bogus -- Ed.] Dora and Pauline Roberts Memorial Nature Preserve; given to Polly Steele to the Denver Botanic Gardens; bordering west side of McIntyre Street. 0.6 miles south of west 64th Avenue, Golden. 13N 0481011E 4399988N. Janet L. Wingate 4587. 24 Aug 1986. ( KHD23400^‡ ) .

- Kinney Run South, 3971. 1/3/2025. .

- 17000 block of Rimrock Drive, 3849. 9/10/2024. .

- South Illinois Open Space, 3943. 12/20/2024. .

- Kinney Run, Tom Schweich 1640. 7/6/2018. .

- North Table Mountain, 1060. 1060. Zeise, Larry Steven, 1976 1336. 1336. Kilburn, Paul D., and Sally L. White, 1992 .

- North Table Mountain Park, Mixed grasses, subshrubs, and forbs. 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. Tom Schweich 1543. 18 Aug 2016. ( EIU JCOS s.n. KHD00063969^‡ ) 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. Tom Schweich 1550. 1 Sep 2016. ( COLO02348456^‡ CS JCOS s.n. KHD00064002^‡ ) .

- Schweich Hill, Determination tentative. Tom Schweich 1531. 3/27/2017. Eastern half of parcel, east slope at edge of smooth brome infestation. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1751. 31 Aug 2017. ( CDA0052330^‡ KHD00065156^‡ ) .

- South Table Mountain, South-facing gentle slope near meatop. South Table Mountain. 13N 0482324E 4400917N. Loraine Yeatts 820. 8 Aug 1983. ( COLO00091546^‡ KHD19323^‡ ) .

- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2205. 6/12/2021. . .

Helianthus annuus L.  Common Sunflower. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- 407 Garden Street, WNS seed 2679. 1/1/2019. WNS seed 2707. 3/21/2019. Kathy Hansen-Stamp 2491. 4/27/2022. .

- Heritage Square, sunny, dry banks. ca 150 yds E of Peabody Museum project. T R70W S10. Ernest H. Brunquist 122. 28 Jul 1960. ( CS38182^‡ ) .

- Lookout Mountain, Lookout Mt. Park. William Huestis 2 Aug 1916. ( COLO 00093492^‡ ) .

- North Table Mountain, 1318. 1318. Kilburn, Paul D., and Sally L. White, 1992 .

- South Table Mountain, On south facing slope, near mesa edge in lava, clay soil. South Table Mountain. 13N 0484205E 4399301N. Loraine Yeatts 684. 11 Jul 1983. ( KHD19325^‡ ) On mesa edge in disturbed ground; very common and widespread especially along roads. S. Table Mt.; on Mesa edge. UTM: 841993 Loraine Yeatts 705. 16 Jul 1983. ( COLO00093781^‡ ) . .

Helianthus nuttallii Torr. & A. Gray.  Nuttall's Sunflower. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Golden, Wet places. Clear Creek valley. Alice Eastwood 92. 3 Sep 1910. ( COLO00094680^‡ ) Along ditch. Ira W. Clokey 3947. 5 Sep 1920. ( NO19068^‡ RM492334^‡ RSA12997^‡ ) . .

Helianthus pauciflorus Nutt. ssp. subrhomboideus (Rydb.) O. Spring & E. Schilling.  (Syn: Helianthus rigidus (Cass.) Desf. ssp. subrhomboideus (Rydb.) Heiser , Helianthus subrhomboideus Rydb. ) Stiff Sunflower. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

[Description pending verification of determination for Coll. No. 1260. -- 27 Dec 2015] Perennial from rhizomes (not a tap-rooted annual), to 1 mm.; Leaves, cauline, opposite, 135 mm. × 32 mm. wide, rhomboid, margin, straight, short-toothed, green, not glaucus, adaxial scabrous-hispid, abaxial scabrous; Inflorescence, solitary heads on long peduncles; Peduncle, 25 cm.; Phyllaries in 3+ imbricate series, all similar, 8-9 mm. × 4 mm. wide, ovo-lanceolate, margin, ciliate, tips, erect; Receptacle, hemispheric, paleate; Paleae, 8 mm., ciliate distally; Rays, sterile, pappus, 2 scales 2.5 mm., corolla, 24 mm. × 6 mm. wide, yellow; Disk flowers, fertile, pappus, crown of scales with 2 elongated to 4 mm., corolla, 5 mm., yellow to dark red distally; cypsela, 3.3 mm., compressed quadrangular. Described from Coll. No. 1260, 26 Jul 2015.

- Lookout Mountain, Lookout Mt. William Huestis 2 Aug 1916. ( CS31175^‡ ) .

- North Table Mountain Park, Also at this location: Thelesperma megapotamicum, Eriogonum alatum, and E. effusum. 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. Tom Schweich 1507. 22 Jul 2016. ( COLO2299709^‡ CS EIU028457^‡ JCOS s.n. KHD00063471^‡ ) . .

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.

- Apex Park - Northern Parcel, Grasslands below foothills scrub, collected nearby: Carduus nutans, Heterotheca villosa, Sphaeralcea coccinea, Linaria dalmatica, and Thinopyrum intermedium. Lower slopes of the Front Range foothills, northeast quadrant of Apex Park, 4.45 km. south of the GNIS location of Golden. Tom Schweich 2548. 7 Jul 2021. ( Golden ) Shortgrass prairie with Artemisia frigida, A. ludoviciana, Heterotheca villosa, Opuntia polyacantha, Eriogonum umbellatum, Tradescantia occidentalis, and Bromus tectorum. 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. Tom Schweich 2789. 10 Jun 2022. ( Golden ) .

- Colorado School of Mines Survey Field, Highest plains at the base of Lookout Mountain. 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 Tom Schweich 1199. 12 Jul 2015. ( CAS KHD00062162^‡ UC UCR267450^‡ ) Foothills grassland below shrubland; also here: Astragalus crassicarpus, Heterotheca villosa, and Hymenopappus filifolius. 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 Tom Schweich 2367. 20 Jun 2020. ( CDA0053754^‡ COLO2434306^‡ CS EIU ) .

- Dakota Ridge, Tom Schweich 1720. 6/14/2019. Also collected here: Bromus japonicus, and Nassella viridula, and nearby: Hypericum perforatum, Potentilla recta, and Muhlenbergia montana. Hogback at the northern city limits of Golden, 3/4 of the way up the west-facing slope, at the lower edge of Cercocarpus montanus, 4.41 km. north northwest of the GNIS location of Golden. Tom Schweich 2354. 12 Jun 2020. ( CDA0053752^‡ OBI149319^‡ REGIS ) .

- Deadman Gulch, Northeast-facing grassy slope. High plains between US Hwy 6 and Lookout Mountain, about 145 m. northwest of the Deadman Gulch undercrossing of US Hwy 6, 2.3 km. south of the GNIS location of Golden. Tom Schweich 1426. 15 Jun 2016. ( CS EIU OBI83310^‡ ) .

- City of Golden Parcel 40-102-01-032, 2751. 6/10/2022. Tom Schweich 3567. 6/8/2024. .

- DeLong Park (City of Golden), In bloom. Likely to be native here, other likely natives seen: Opuntia macrorhiza, Comandra umbellata ssp. pallida and Carex inops ssp. heliophila. 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. Tom Schweich 3011. 29 Jun 2023. ( Golden ) .

- Golden, Roadside. Junction of HWY6 and HWY58, west of Golden. 13N 0478751E 4399196N. Janet L. Wingate 61. 17 Jul 1978. ( COLO00095042^‡ KHD447^‡ ) .

- Grampsas North, 3912. 12/7/2024. .

- Heritage Square, 1/2 mi WSW of Peabody Museum project, W of E end of shallow canyon of Apex Ck. T R70W S10. Ernest H. Brunquist & J Friedlander 111. 16 Jul 1960. ( CS38391^‡ ) .

- Magpie Gulch, Tom Schweich, with Cindy Trujillo 3070. 5/22/2023. .

- Mount Vernon Canyon, In gulch of old US 40 just below turn off to Cabrini Shrine. 13N 0480473E 4394143N. Berta Anderson 1056. 28 Jun 1979. ( KHD25845^‡ ) .

- North Table Mountain, 1061. 1061. Zeise, Larry Steven, 1976 1243. 1243. Kilburn, Paul D., and Sally L. White, 1992 .

- 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. Tom Schweich 1210. 13 Jul 2015. ( JCOS s.n. KHD00062161^‡ UCR267451^‡ ) 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. Tom Schweich 1523. 5 Aug 2016. ( COLO02347920^‡ JCOS s.n. KHD00063462^‡ UC ) .

- Schweich Hill, Determination tentative Tom Schweich 1508. 3/27/2017. East-facing slope near center of parcel. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1704. 14 Jul 2017. ( CAS CDA0052323^‡ KHD00065458^‡ ) Tom Schweich 3043. 5/21/2023. .

- South Table Mountain, South facing, clay soil, recent burn site. South Table Mountain, below mesa edge. 13N 0483009E 4400494N. Loraine Yeatts 610. 27 Jun 1983. ( KHD19326^‡ ) Lava -capped mesa. Few plants on steep E. facing roadcut. S. Table Mt. Along Quaker rd. UTM: 84269932 Loraine Yeatts 771. 7 Aug 1983. ( COLO00095232^‡ ) .

- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2282. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 Tom Schweich, with Ann Norton 2206. 6/12/2021. .

- Tin Cup Ridge, Among shrubs and grasses typical of Front Range foothills. 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. Tom Schweich 2106. 30 Jun 2019. ( CAS JCOS s.n. KHD00070544^‡ OBI183233^‡ UCR ) . .

Heliomeris multiflora Nutt. var. multiflora.  Showy Golden Eye. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Apex Gulch, dry. bed of Apex Ck within 1/2 - 1 mi WSW of Peabody Museum project. T R70W S10. Ernest H. Brunquist 131. 4 Aug 1960. ( CS38192^‡ KHD323^‡ ) . [ KHD34255 is determined Viguiera multiflora, a synonym of Heliomeris m.. ]

- Apex Park - Northern Parcel, In shade of ponderosa pines, growing in Rhus trilobata. 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. Tom Schweich, with Cindy Trujillo 2737. 1 Sep 2021. ( Golden ) .

- Golden, Earl L. Johnston 393.2 28 Aug 1916. ( RM482632^‡ ) .

- Lookout Mountain, Above Golden. Mrs. Ella Bailar 1905. ( COLO00095463^‡ ) .

- Magpie Gulch, Floor of gulch, full sun and high shade, with Symphyotrichum porteri, Cynoglossum officinale, Hypericum perforatum, Mentha spicata, Monarda fistulosa, and Rubus deliciosus. Mouth of Magpie Gulch on the southeast flank of Mount Galbraith, 1.72 km. (geodesic) west northwest of the GNIS location of Golden. Tom Schweich 3228. 19 Sep 2023. ( Undist. ) . .

Heterotheca foliosa (Nutt.) Shinners.  (Syn: Heterotheca villosa (Pursh) Shinners var. foliosa (Nutt.) V.L. Harms ) Hairy False Goldenaster. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Perennial, to 40 cm.; Stem, spreading hairy, glandular; Leaves, cauline, alternate, 33 mm. × 9 mm. wide, oblong, margin entire, tip acute, appressed hairy; Peduncle, 15 mm.; Bracts, leafy, 10-16 mm. × 2.5 mm., lanceolate, some exceeding heads by 4-7 mm.; Involucre, 9 mm. × 14 mm. wide; Phyllaries, in 4+ graduated series, 4-9 mm. × 1 mm. wide, lanceolate, slightly keeled proximally, mostly green, abaxial surface glandular and hairy, margin hairy; Receptacle, epaleate, short (0.5 mm.) scales; Flowers, 2 kinds; Rays, sterile, corolla, 11 mm., yellow; Disk flowers, corolla, 7 mm., yellow; Pappus, short (0.6 mm.) and long (6 mm.) bristles, ≥disk corolla; cypsela, 1.3 mm., hairy. Described from Coll. No. 1258, 26 Jul 2015.

- Apex Gulch, Possibly an intergrade between H. foliosa and H. villosa. Beside the Apex Gulch Trail, 100-110 m. west of the trailhead, 5.86 km. south of the GNIS location of Golden. Tom Schweich 2733.1 25 Aug 2021. ( Golden ) .

- Heritage Square, Habitat: gentle slope, open grassy field, 6125 ft USA, Colorado, Jefferson, South facing slope about 100 yds from Peabody Museum of Harvard Univ. Verbatim Coordinates: 13N 0477154E 4386895N E. H. Brunquist 118. 28 Jul 1960. ( KHD8534^‡ ) .

- South Table Mountain, Growing under elm tree next to road in clay soil of volcanic origin; plant branched from base with several almost erect stems. S. Table Mt. UTM: 843993 Loraine Yeatts 743. 27 Jul 1983. ( COLO00096321^‡ ) [ Originally ID as Heterotheca villosa var. foliosa. Annotations: Heterotheca fulcrata, det. by W. A. Weber 1984. / Heterotheca foliosa (Nutt.) Shinners; A fairly distinct race of H. villosa, common in the Colorado Front Range. This has nothing to do with H. fulcrata; det. By W. A. Weber 1996. ] Along Quaker Rd, just N. of Golden Hills Rd growing under elm tree; only plant in area.. 13N 0483009E 4400494N. Loraine Yeatts 753. 27 Jul 1983. ( CS85522^‡ KHD19395^‡ ) . [ CS 86622 is determined H. foliosa, KHD8541 is determined H. fulcrata. H. fulcrata misapplied, per Ackerfield (2015). ] .

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. All infra-specific taxa treated here as synonyms.

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.

- Apex Park - Northern Parcel, Grasslands below foothills scrub, collected nearby: Carduus nutans, Helianthus pumilus, Sphaeralcea coccinea, Linaria dalmatica, and Thinopyrum intermedium. Lower slopes of the Front Range foothills, northeast quadrant of Apex Park, 4.45 km. south of the GNIS location of Golden. Tom Schweich 2549. 7 Jul 2021. ( Golden OBI183415^‡ ) .

- Colorado School of Mines Survey Field, Foothills grassland below shrubland; also here: Astragalus crassicarpus, Helianthus pumilus, and Hymenopappus filifolius. 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 Tom Schweich 2368. 20 Jun 2020. ( CAS CDA0053755^‡ CS EIU ) .

- Dakota Ridge, Open herbaceous vegetation, ponderosa pines and mountain mahogany shrubland nearby. Also collected here: Koeleria macrantha, Hesperostipa comata, and Eriogonum umbellatum var. umbellatum. Hogback at the northern city limits of Golden, dry and more or less flat area on top of ridge, 4.38 km. north northwest of the GNIS location of Golden. Tom Schweich 2358. 12 Jun 2020. ( COLO2434165^‡ REGIS ) .

- City of Golden Parcel 40-102-01-032, 2777. 6/10/2022. .

- Cottonwood Natural Area, 3953. 12/27/2024. .

- DeLong Park (City of Golden), 2836. 6/16/2022. .

- Golden, Plains. Golden. Base of Lookout Mt. J. H. Ehlers 8103. 3 Jul 1941. ( COLO00098749^‡ ) Roadside. Junction of hwy 6 & hwy 58 West of Golden. 13N 0479795E 4400337N. Janet L. Wingate 60. 17 Jul 1978. ( KHD446^‡ ) .

- Golden History Park, Tom Schweich 2989. 4/25/2023. .

- Golden Reservoir, SE-facing slope, sandy soil. Lariat Loop Rd., 1 mi. NW of I-70, 1/4 mi. SW of Golden Reservoir, SW of Golden. T4S R70W S5. J Hutchison 8. 1 Sep 1996. ( CS82048a^‡ ) .

- 407 Garden Street, Kathy Hansen-Stamp 2518. 4/28/2022. .

- Heritage Square, 125 yds archeological excavation of Peabody museum E by NE. T R70W S10. Ernest H. Brunquist 1 Jul 1960. ( CS37647^‡ KHD607^‡ ) .

- Kinney Run, Var. minor if infraspecific names are to be applied. West slope of the hogback on the east side of Kinney Run, between the Cambria Lime Kiln and Tripp Ranch, 3.20 km. south southeast of the GNIS location of Golden. Tom Schweich 1967. 6 Jul 2018. ( COLO02348571^‡ KHD00068682^‡ OBI UC ) .

- Magpie Gulch, Tom Schweich, with Cindy Trujillo 3154. 5/22/2023. Tom Schweich, with Cindy Trujillo 3213. 5/31/2023. .

- North Table Mountain, 1062. 1062. Zeise, Larry Steven, 1976 1244. 1244. Kilburn, Paul D., and Sally L. White, 1992 .

- 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. Tom Schweich 1209. 13 Jul 2015. ( CS JCOS s.n. KHD00062155^‡ OBI83171^‡ ) Mixed grasses and forbs upslope of North Table Loop. 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. Tom Schweich 1521. 29 Jul 2016. ( EIU028181^‡ JCOS s.n. KHD00063461^‡ OBI83315^‡ ) .

- Schweich Hill, Tom Schweich 1513. 3/27/2017. Top of hill, center of parcel. Somewhat ambiguous as to var. minor vs. var. nana. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1664. 16 Jun 2017. ( CDA0050017^‡ EIU KHD00065487^‡ ) .

- South Table Mountain, Uniformly covering S. facing slope below mesa edge; very common. Front Range, S. Table Mountain, Golden. 13N 0484200E 4399300N. Loraine Yeatts 605. 27 Jun 1983. ( COLO00098665^‡ KHD19408^‡ ) .

- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2283. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 Tom Schweich, with Ann Norton 2207. 6/12/2021. .

- Tin Cup Ridge, 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. 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. Tom Schweich 2097. 30 Jun 2019. ( CAS CS JCOS s.n. KHD00070808^‡ ) .

- Tucker Gulch (lower), Common within the city limits of Golden, along the creek of Tucker Gulch and the Tucker Gulch Trail, about 250 m. north of the First Street Bridge, and 350 m. south southwest of Ford Street. Tom Schweich 1055. 10 Aug 2014. ( CAS UC2045980^‡ UCR266872^‡ ) . .

Hymenopappus filifolius Hook. var. polycephalus (Osterh.) B.L. Turner.  Many-Headed Fine-Leaved Wooly-White. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Perennial herb, to 60 cm., ±tomentose throughout; Leaves, basal, petiole 35 mm. + blade 75-105 mm. × 30-50 mm. wide, oblanceolate in shape, base conspicuously tomentose, bipinnately dissected to filiform segments, ultimate leaf divisions (8)12-19 mm., cauline, similar, reduced above, #(4)5-8; Inflorescence, heads borne singly on peduncles, 22-45 mm.; Heads, (5)7-16 per stem; Involucre, 8 mm. × 15 mm. wide; Phyllaries, 1-2 series (vague what is a series and what not), 6-7 mm. × 2.5-4.0 mm. wide, inner > outer, green, tomentose, margins chartaceous, tips broad; Receptacle, epaleate, flat; Flowers, 1 kind; Disk flowers, corollas, 3.5 mm., yellow; Pappus, crown of scales, 0.8-1.2 mm.; Cypsela, 3-5 mm., hairy all over, more so on the angles. (Described from Coll. No. 1427, 15 June 2016, and Coll. No. 1504, 13 July 2016.)

- Colorado School of Mines Survey Field, Tom Schweich 1614. 5/28/2018. East-facing slope with low forbs and grasses in foothills grassland below shrubland; also collected here: Astragalus crassicarpus, Helianthus pumilus, and Heterotheca villosa. 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 Tom Schweich 2369. 20 Jun 2020. ( CAS COLO2434314^‡ CS OBI149311^‡ REGIS ) .

- Dakota Ridge, Tom Schweich 1717. 6/14/2019. .

- Deadman Gulch, East-facing grassy slope. Deadman Gulch is often referred to by the locally euphemistic name of “Kinney Run.” High plains between US Hwy 6 and Lookout Mountain, about 145 m. northwest of the Deadman Gulch undercrossing of US Hwy 6, 2.3 km. south of the GNIS location of Golden. Tom Schweich 1427. 15 Jun 2016. ( KHD00063989^‡ UC UCR278000^‡ ) .

- City of Golden Parcel 40-102-01-032, 2766. 6/10/2022. .

- Golden, U.S.A., Colorado, Jefferson, 3 mi E of Golden. Alan A. Beetle 2034. 6 Jul 1937. ( RM153770^‡ ) .

- Heritage Square, sandy-loam S-facing slope. 100 yds ENE of archeological dig of Peabody Museum. T R70W S10. Ernest H. Brunquist 97. 1 Jul 1960. ( CS37648^‡ ) .

- Kinney Run, Tom Schweich 1631. 7/6/2018. .

- 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. Tom Schweich 1504. 13 Jul 2016. ( EIU028681^‡ JCOS s.n. KHD00063468^‡ OBI83338^‡ ) .

- Schweich Hill, In a slightly more exposed area on the south side of the hill where there are fewer non-natives and less disturbance. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1663. 16 Jun 2017. ( CDA50018^‡ KHD00065488^‡ ) .

- South Table Mountain, large patch of Chrysothamnus also present. Survey of Golden Gate Canyon State Park. Colorado native Plant society. South Table Mountain, at base of E. facing shallow gully near Quaker Rd. 13N 0483009E 4400494N. Loraine Yeatts 589. 27 Jun 1983. ( KHD19409^‡ ) .

- Tin Cup Ridge, Mixed grasses and forbs with: Rhus trilobata, Artemisia ludoviciana, Heterotheca villosa, Amelanchier alnifolia, and Bromus japonicus. 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. Tom Schweich 2815. 28 Jun 2022. ( Golden ) . .

Lactuca serriola L.  Prickly Lettuce. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Annual herb, Stems erect, Leaves basal 0 at flowering, cauline coarsely lobed, margins prickly-toothed, Fruit beak slender, many-ribbed, ~8 adaxial, ~5 abaxial (Described from Collection No. 911, 4 Oct 2012).

- 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. Tom Schweich, with Carol Cameron & David Chavez 2778. 6 May 2022. ( Golden ) .

- Golden History Park, Tom Schweich 3002. 4/25/2023. .

- Heritage Square, disturbed open gnd. 2 1/2 mi S of Golden. 13N 0481825E 4396310N. Ernest H. Brunquist 3. 14 Aug 1959. ( CS23942^‡ KHD16980^‡ ) .

- North Table Mountain, 1069. 1069. Zeise, Larry Steven, 1976 .

- North Table Mountain Park, Growing in cracks in the basalt of the upper flow, plentiful in rocks and in soil below. Introduced. 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. Tom Schweich 1548. 1 Sep 2016. ( CS EIU JCOS s.n. KHD00064004^‡ ) .

- Schweich Hill, Determination tentative Tom Schweich 1500. 3/27/2017. Large, against neighbor's fence, maybe getting watered with neighbor's landscaping. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1749. 31 Aug 2017. ( CDA0052329^‡ JCOS s.n. KHD00065360^‡ ) .

- South Table Mountain, In gravel at edge of roadbed. South Table Mountain. 13N 0484200E 4399600N. Loraine Yeatts 774. 9 Aug 1983. ( COLO00100529^‡ KHD19405^‡ ) .

- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2208. 6/12/2021. . .

Liatris ligulistylis (A. Nelson) K. Schum.  Northern Plains Gayfeather. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Lookout Mountain Park, Lookout Mt Park Ellsworth Bethel 18 Sep 1915. ( CS20125^‡ ) . .

Liatris punctata Hook.  Dotted Blazing Star. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Perennial herb, to 32 cm.; Leaves, cauline, alternate, 78 mm. × 3.5 mm. wide, gradually reduced above, linear, glandular punctate, margins, entire, revolute, sparsely hairy; Inflorescence, single heads in axils on short pedicels; Involucre, 16 mm. × 7 mm. wide, ±cylindrical; Phyllaries, in 2+ series, inbricate, 14 mm. × 3.8 mm. wide, glandular-punctate abaxially distally, margin, ciliate, scarious, tip acute; Receptacle, epaleate; Flowers, one kind; Disk flowers; Corolla, tube white 8 mm. + lobes purple 2.5 mm.; Pappus, bristles, one series, 10 mm., plumose; Cypsela, 7 mm., hairy. Described from Coll. No. 1264, 29 Jul 2015.

- Apex Park - Northern Parcel, Foothills grassland, with both foothills and riparian shrubland nearby, open southeast-facing slope with Heterotheca villosa, and Hesperostipa comata. 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. Tom Schweich 2428. 19 Aug 2020. ( CAS CDA0053778^‡ JCOS s.n. UCR ) .

- Colorado School of Mines Survey Field, Tom Schweich 2539. 4/29/2022. 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. Small divide between two unnamed streams, southeast quadrant of Survey Field, 2.23 km. (geodesic) south of the GNIS location of Golden. Tom Schweich 3195. 27 Aug 2023. ( Undist. ) Tom Schweich 3362. 8/27/2023. .

- Dakota Ridge, Foothills grassland with a few Rhus trilobata. Cercocarpus montanus higher up the slope. Also collected here: Cerastium arvense, Scutellaria brittonii, Castilleja integra, and Alyssum simplex. Northwesternmost city limits of Golden, west side of Dakota Ridge (North Hogback), about half way up the slope above Cressmans Gulch, 2.60 km. north northwest of the GNIS location of Golden. Tom Schweich 2405. 29 Jul 2020. ( CDA0053770^‡ ) .

- Golden, LOWER MONTANE, ROADSIDE EMBANKMENT, SOIL DRY AND ROCKY. Donor: Herbarium, University of Colorado, Denver Center HWY 6 & 58, Golden. 13 0479810E 4400337N. Cynthia Shephers 9. 23 Sep 1977. ( KHD40961^‡ ) LOWER MONTANE, ALONG ROADSIDE. Donor: Herbarium, University of Colorado, Denver Center JUNCTION OF #6 AND #58, W OF GOLDEN. 13N 0479810E 4400337N. L Harvill 14. 20 Sep 1977. ( KHD40960^‡ ) United States of America, Colorado, Golden N. L. Britton 8 Oct 1882. ( NY3043812^‡ ) .

- Golden Reservoir, SE-facing slope, sandy soil. Lariat Loop Rd., 1 mi. NW of I-70, 1/4 mi. SW of Golden Reservoir, SW of Golden. T4S R70W S5. J. Hutchison 16. 1 Sep 1996. ( CS82049^‡ ) .

- 407 Garden Street, WNS seed 2680. 1/1/2019. WNS seed 2701. 3/21/2019. 2949. 9/20/2022. Kathy Hansen-Stamp 2497. 4/27/2022. .

- Grampsas North, 3920. 12/7/2024. .

- Heritage Square, Open grassy field. 2.5 mi S of Golden. T R70W S10. Ernest H. Brunquist 49. 25 Aug 1959. ( CS23934^‡ ) .

- Lookout Mountain, Dry rocky timber. Golden: Lookout Mountain. Ira W. Clokey 2652. 18 Sep 1915. ( RM491886^‡ ) Above Golden. Mrs. Ella Bailar 1905. ( COLO00103143^‡ ) .

- Magpie Gulch, Tom Schweich, with Cindy Trujillo 3101. 5/22/2023. .

- North Table Mountain, 1072. 1072. Zeise, Larry Steven, 1976 1252. 1252. Kilburn, Paul D., and Sally L. White, 1992 .

- North Table Mountain Park, Mixed grasses and forbs. 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. Tom Schweich 1536. 18 Aug 2016. ( COLO02348639^‡ CS EIU JCOS s.n. KHD00063460^‡ OBI83314^‡ ) Grassy gentle slope, this plant is an early bloomer among its species here. 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. Tom Schweich 1736. 15 Aug 2017. ( JCOS s.n. KHD00065321^‡ UCR ^‡ ) .

- Schweich Hill, Tom Schweich 1524. 3/27/2017. Northeast section, in deep grasses (mostly smooth brome) and other weeds. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1747. 31 Aug 2017. ( CAS KHD00065355^‡ ) .

- South Table Mountain, Widespread and common on lava pavement. South Table Mountain. 13N 0484200E 4399700N. Loraine Yeatts 824. 29 Aug 1983. ( COLO00102848^‡ KHD19404^‡ ) .

- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2284. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 .

- 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. Tom Schweich, with Cindy Trujillo 2675. 10 Aug 2021. ( COLO2706562^‡ ) . .

Lygodesmia juncea (Pursh) D. Don ex Hooker.  Rush Skeletonplant. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora. FNANM preserves L. juncea (Pursh) D. Don ex Hooker, whereas Snow (2009) refers it to L. grandiflora (Nutt.) Torr & A. Gray var. dianthopsis (D. C. Eat.) S. L. Welsh.

Pappus of capillary bristles.

- Magpie Gulch, Tom Schweich, with Cindy Trujillo 3224. 5/31/2023. .

- North Table Mountain, 1075. 1075. Zeise, Larry Steven, 1976 1258. 1258. Kilburn, Paul D., and Sally L. White, 1992 .

- South Table Mountain, On steep clay slope. Jefferson County, Colorado, USA. S. Table Mt. On west side of Quaker road. UTM: 99308426. Loraine Yeatts 773. 7 Aug 1983. ( COLO00106021^‡ ) . [ One of two collections numbered #773, the other being Stephanomeria pauciflora. ] .

Mulgedium pulchellum (Pursh) G. Don in R. Sweet.  (Syn: Lactuca tatarica (L.) C.A.Mey. , Lactuca tatarica (L.) C.A.Mey. var. pulchella (Pursh) Breitung ) Blue Lettuce. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Golden, NW of Golden Brick Yards, Golden. Unknown 3 Jun 1934. ( CS48176^‡ CS48177^‡ ) .

- South Table Mountain, In fine sandy, silty, humus soil with Psoralea tenuiflora, Achillea lanulosa, Ambrosia psilostachya, Pascopyrum smithii, Poa pratensis, Bromus japonicus, Stipa viridula. Front Range, S. Table Mountain, W. side of mesatop near powerline at head of dry streambed in shallow swale. 13N 0482500E 4400600N. Stanley Smookler 20 Jul 1992. ( KHD29627^‡ ) . .

Nothocalais cuspidata (Pursh) Greene.  Prairie False Dandelion. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Apex Park - Northern Parcel, 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. 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. Tom Schweich 2283. 18 May 2020. ( COLO2433795^‡ JCOS s.n. KHD00073452^‡ ) .

- 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. Tom Schweich 1791. 24 Apr 2018. ( CAS KHD00068681^‡ OBI124856^‡ UCR ^‡ ) .

- Dakota Ridge, About ¼ up the west limb, sparsely vegetated soil; with Rhus trilobata, Yucca glauca, Linum lewisii, Eriogonum alatum, Poa sp., and Euphorbia esula. Lower western slope of hogback in northernmost Golden, 4.2 km. north northwest of the GNIS location of Golden. Tom Schweich 2759. 26 Apr 2022. ( Golden ) .

- North Table Mountain, 1267. 1267. Kilburn, Paul D., and Sally L. White, 1992 .

- North Table Mountain Park, “Wavy-leaved dandelion,” open prairie on top of mesa, common. Beside North Table Loop, just south of intersection with Tilting Mesa Trail. Tom Schweich 1095. 30 Apr 2015. ( JCOS s.n. KHD56903^‡ UC2045768^‡ ) .

- Schweich Hill, top of hill Tom Schweich, with Cathy Hansen-Stamp 3011. 4/27/2023. .

- South Table Mountain, S. facing slope; locally common in meadows; clay soil of volcanic origin. S. Table Mt. W. of Quaker rd. UTM: 842992 Loraine Yeatts 473. 9 May 1983. ( COLO 00110056^‡ ) On flats. South Table Mountain; Flats west of Quaker Rd. above gate. 13N 0484300E 4399500N. Loraine Yeatts 575. 1 Jun 1983. ( KHD19401^‡ ) .

- Tin Cup Ridge, mixed talus and soil, only one seen in bloom. Tom Schweich 1817. 4/30/2020. . .

Onopordum acanthium L.  Scotch Cottonthistle. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Dakota Ridge, Tom Schweich 1700. 6/14/2019. .

- Cottonwood Natural Area, 3956. 12/27/2024. .

- 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. Tom Schweich, with Carol Cameron & David Chavez 2772. 6 May 2022. ( Golden ) The leaves have been lightly brushed to remove sand, but this has affected the tomentum. Colorado Noxious Weed List B. 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. Tom Schweich, with Carol Cameron & David Chavez 2776. 6 May 2022. ( Golden ) .

- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2285. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 . .

Packera fendleri (A. Gray) W.A. Weber & Á. Löve.  (Syn: Senecio fendleri A. Gray ) Fendler’s Ragwort. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Deadman Gulch, Northeast-facing slope, more open stoney ground, on what appears to be a southeast to northwest trend approximating the trend of Eagle Ridge to the southeast. Above the watercourse locally named “Kinney Run,” between US Highway 6 and Eagle Ridge Drive, 110 m. northwest of Kinney Run Trail, 3.17 km. south of the GNIS location of Golden. Tom Schweich 2044. 2 Jun 2019. ( COLO2434769^‡ KHD00071096^‡ OBI ^‡ UCR ) .

- Golden, Dry Hills. Golden, CO. 13N 0481041E 4400338N. I. W. Clokey 4395. 9 Jun 1921. ( KHD3574^‡ RM492395^‡ RM492396^‡ ) .

- Magpie Gulch, ridge between Magpie and Nightbird gulches Tom Schweich, with Cindy Trujillo 3158. 5/22/2023. ridge between Magpie and Nightbird gulches Tom Schweich, with Cindy Trujillo 3161. 5/22/2023. .

- North Table Mountain, as Senecio fendleri 1292. 1292. Kilburn, Paul D., and Sally L. White, 1992 .

- North Table Mountain Park, North Table Mountain Mark Duff 83. 20 Jun 1992. ( COLO00114801^‡ ) .

- Schweich Hill, Near social trail just west of the top of hill. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1817. 12 May 2018. ( KHD00068678^‡ ) Tom Schweich 1838. 5/12/2020. budding Tom Schweich 3552. 4/30/2024. .

- South Table Mountain, On south-facing slope. Golden, South Table Mountain; south-facing slope above Golden Hills Road. 13N 0484200E 4399200N. Loraine Yeatts 491. 16 May 1983. ( KHD19482^‡ ) Basalt flow in Denver Formation, common on s. facing slope. S. Table Mt., a lava capped mesa, near mesa top. UTM: 840997 Mary E. Edwards 415. 1 Jun 1983. ( COLO 00114918^‡ ) . .

Packera plattensis (Nuttall) W. A. Weber & Á. Löve.  (Syn: Senecio plattensis (Packera) Nutt. ) Prairie Groundsel. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Perennial herb, 14 cm., from taprooted caudix, sap not milky; Stem, light green, tomentose, densely so in axils; Leaves, mostly basal and few cauline, alternate, petiole 8 mm., blade 10 mm. × 5 mm. wide, oblanceolate, surface, upper thinly tomentose, lower moderately tomentose, especially the mid-vein, margin, crenulate; Inflorescence, head enclosed by involucre, showy; Heads, #10, pedicels, 12 mm.; Involucre, 7 mm. × 5-6 mm. wide, thinly tomentose; Phyllaries, equal, in 1 series, 5 mm. × 0.7 mm. wide, green, flat; Receptacle, epaleate; Flowers, of 2 kinds; Ray flowers, #10, tube 3 mm. + blade 7 mm., yellow, fertile; Disc flowers, many, tube 4 mm. + lobes 0.5 mm., yellow; Pappus, many, well-developed, bristles, 4 mm., ±equal, Style, 2-branched; Fruit, 1 mm., green, beak-less, glabrous. (Described from Coll. No. 1817, 12 May 2018).

- North Table Mountain, 1125. 1125. Zeise, Larry Steven, 1976 . .

Packera tridenticulata (Rydb.) W.A. Weber & Á. Löve.  (Syn: Senecio tridenticulatus Rydb. ) Three-Tooth Ragwort. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Perennial, to 25 cm., densely tomentose below, thinning above; Leaves, mostly basal, petiole 40 mm. + blade 24 mm. × 7 mm. wide, sparsely shallowly toothed, few cauline, tomentose in the axils, petiole 20 mm. + blade 24 mm. × 4 mm. wide, sparsely shallowly toothed, a few are 3-lobed at tip; Inflorescence, corymbiform, heads #12±, flowers of 2 kinds; Involucre, 6 mm. × 11 mm. wide, bowl-shaped; Phyllaries, 1 series (with little overlap), 4 mm. × 1.2 mm. wide, mostly green, 2+ veins, 1 margin chartaceous; Receptacle, epaleate; Rays, #11±, fertile, tube 2.5 mm. + blade 5.5 mm. × 2 mm. wide, yellow; Disc flowers, yellow; Pappus, capillary bristles, 4.5 mm.; Cypsela, 2.5 mm., glabrous. Described from Coll. No. 1643, 30 May 2017.

- Golden, United States of America, Colorado, Jefferson Co., Golden Ellsworth Bethel, with Ira W. Clokey 4398. 9 Jun 1921. ( NY3119713^‡ ) Dry meadow on rolling-hill topography. Verbatim Coordinates: 13 0481350E 4406445N USA, Colorado, Jefferson County, Between 58th and 64th Avenues, on east side of Colorado Hwy 93, 1.5 miles north of City of Golden. Collection site located on north side of a hill, just north of the Dairy, a known landmark. Linda Senser 125. 3 Jun 2001. ( KHD38233^‡ ) USA, Colorado, Jefferson County, SE corner of 68th St. and Hwy 93, Golden. Verbatim Coordinates: 13N 0481144E 4400434N Louise Wildeman 9 Jun 2005. ( KHD10531^‡ ) Abundant. Impressive display. SE corner of 68th St. and Hwy 93, Golden. 13N 0481144E 4400434N. Louise Wildeman 9 Jun 2005. ( KHD10531^‡ ) .

- Schweich Hill, Top of hill, among most intact area of native vegetation. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1643. 30 May 2017. ( CS KHD00065490^‡ ) . .

Picradeniopsis oppositifolia (Nutt.) Rydb. ex Britton.  (Syn: Bahia oppositifolia (Nutt.) A. Gray ) Opposite Leaf Bahia. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Golden, Gravelly hillsides. Foothills near Golden. H. N. Patterson 71. 2 Jul 1885. ( COLO 00120444^‡ NY1923126^‡ ) .

- South Table Mountain, Level area which catches water. South Table Mountain; along old road on Jefferson County open space land. 13N 0486260E 4399900N. Mary E. Edwards 395. 1 Jul 1983. ( COLO00120311^‡ KHD19705^‡ ) . .

Prenanthes racemosa Michx.  (Syn: Nabalus racemosus (Michx.) Hook. , Prenanthes racemosa Michx. var. multiflora (Cronquist) Dorn ) Purple Rattlesnake Root. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Golden, Ellsworth Bethel 22 Aug 1906. ( CS23267^‡ ) .

- Lookout Mountain, Lookout Mt Park. Ellsworth Bethel 31 Aug 1915. ( CS23268^‡ ) Lookout Mountain. William Huestis 2 Aug 1916. ( COLO00121137^‡ ) . .

Pseudognaphalium canescens (DC.) Anderberg.  (Syn: P. canescens (DC.) W. A. Weber [illeg.] ) Wright's Rabbit-Tobacco. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Perennial, to 25 cm.; Leaves, alternate, petiole 16 mm. + blade 30 mm. × 10 mm. wide, tomentose (slightly less so adaxially), sessile glandular beneath the tomentum; Inflorescence, terminal and axial on leafy stems; Phyllaries, 3 series, 3.7 mm. × 1 mm. wide, green center, mostly scarious, innermost glabrous; Receptacle, epaleate, flat; Flowers, 2 kinds (heads disciform); Rays, small, inconspicuous, sterile; Disk flowers, corolla, 2 mm., yellow; Pappus, capillary bristles, >corollas. (Described from Coll. No. 1549, 1 Sep 2016.)

- Dakota Ridge, Top of ridge, east side. Tom Schweich 1739. 6/14/2019. Sedimentary rock outcrops and foothills shrubland, also collected nearby: Linaria canadensis var. texana, Physaria montana, and Viola nuttallii. Northwesternmost city limits of Golden, west side of Dakota Ridge (North Hogback), base of rock outcrop at top of ridge, 2.65 km. north northwest of the GNIS location of Golden. Tom Schweich 2403. 29 Jul 2020. ( COLO2433837^‡ OBI149099^‡ ) .

- Golden, The plant grows out of a crack between the sidewalk and a wall. City of Golden: Just east of 1010 9th St. 13N 0480555E 4400715N. Stanley Smookler 350. 10 Aug 2002. ( COLO 00837567^‡ KHD40080^‡ ) .

- Magpie Gulch, determination tentative Tom Schweich, with Cindy Trujillo 3220. 5/31/2023. .

- North Table Mountain Park, Growing in cracks in the basalt of the upper flow, very few seen. 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. Tom Schweich 1549. 1 Sep 2016. ( KHD00064001^‡ ) .

- Tin Cup Ridge, west base of cliff, vegetative 2852. 6/28/2022. . .

Pseudognaphalium macounii (Greene) Kartesz.  Macoun’s Rabbit-Tobacco. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Annual (?) to 45 cm.; Leaves, cauline, alternate, 40 mm. × 4 mm. wide, decurrent, lance-linear, entire, stalked glandular, tomentose abaxially; Inflorescence, branched axial and terminal; Heads in tight clusters, disciform; Involucre, 4 mm.; Receptacle, epaleate; Phyllaries in 4+ series, hyaline; Pappus, bristles. Described from Coll. No. 1257, 26 Jul 2015.

- Lookout Mountain Nature Center, Open Ponderosa forest, growing in patches, loacally common. Few plants., Jefferson County Nature Center, open Ponderosa forest. 13N 0478695E 4397078N. Stanley Smookler 5. 26 Aug 1986. ( KHD27038^‡ ) . [ Per FNANM, “Reports of Pseudognaphalium viscosum from the flora for states other than Texas are based on plants of P. macounii.” ] .

Ratibida columnifera (Nutt.) Woot. & Standl.  (Syn: Rudbeckia columnifera Nutt. ) Upright Prairie Coneflower. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Perennial herb, to 50 cm., tap-rooted; Leaves, cauline, to 11 cm. × 3 cm. wide, 1-pinnate, pinnae to 39 mm. × 4 mm. wide, some toothed; Inflorescence, single heads per stem, >> leaves; Involucre, 14 mm. diameter; Phyllaries, 1 series, lanceolate, hairy abaxially; Receptacle, cylindric, paleate; Rays, #5, 17 mm., × 13 mm. wide, elliptic-ovate, sterile, corolla yellow; Disk, cylindric, 20-45 mm. × 9-12 mm. wide; Palea, folded around but not enclosing disk flowers; Disk flowers, many, corolla greenish-yellow; Pappus, short crown of scales; Fruit, compressed, but maybe not strongly, ciliate adaxially(!). Described from Coll. No. 1198, 12 July 2015.

- Colorado School of Mines Survey Field, Highest plains at the base of Lookout Mountain. 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 Tom Schweich 1198. 12 Jul 2015. ( KHD56979^‡ OBI83170^‡ UC UCR267678^‡ ) .

- Eagle Ridge, On mesa slope in foothills. Notes: Transferred from USGS Herbarium, Denver, CO (2005). Colorado, Jefferson, Foothills of the Front Range, Junction of US 6 and road to Morrison, about 1 mile east of Golden. Handsford T. Shacklette 5876. 27 Jun 1959. ( COLO00857987^‡ ) .

- Golden, Plains. At base of Lookout Mt., Golden. J. H. Ehlers 8114. 5 Jul 1914. ( COLO00124321^‡ ) Roadside. Junction of Hwy 6 and Hwy 58, west of Golden, CO. 13N 0479779E 4400334N. Janet L. Wingate 62. 17 Jul 1978. ( KHD444^‡ ) .

- 407 Garden Street, WNS seed 2675. 1/1/2019. WNS seed 2705. 3/21/2019. Kathy Hansen-Stamp 2490. 4/27/2022. "Mexican Hat" Kathy Hansen-Stamp 2494. 4/27/2022. .

- 17000 block of Rimrock Drive, 3853. 9/10/2024. .

- Kinney Run, West slope of the hogback on the east side of Kinney Run, between the Cambria Lime Kiln and Tripp Ranch, 3.19 km. south southeast of the GNIS location of Golden. Tom Schweich 1966. 6 Jul 2018. ( COLO02348597^‡ KHD00068677^‡ OBI UC ) .

- North Table Mountain, 1111. 1111. Zeise, Larry Steven, 1976 1285. 1285. Kilburn, Paul D., and Sally L. White, 1992 .

- 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. Tom Schweich 1496. 13 Jul 2016. ( COLO2299725^‡ CS EIU028190^‡ JCOS s.n. KHD00063466^‡ ) .

- Schweich Hill, Southeast corner of parcel, between social trails. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1702. 14 Jul 2017. ( CAS CDA0052322^‡ KHD00065461^‡ ) .

- South Table Mountain, On S. facing clay slope below mesa edge. S. Table Mt. W of Quaker rd. UTM: 842992. Loraine Yeatts 625. 3 Jul 1983. ( COLO00124297^‡ ) South Table Mountain; east side of Quaker Road near Golden Hills road. 13N 0484200E 4398900N. Loraine Yeatts 679. 11 Jul 1983. ( BRY264320^‡ KHD19397^‡ ) .

- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2286. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 .

- White Ash Mine Park, On disturbed ground bordering the park path. A common erect herb., White Ash Park in Golden, CO, near base of foothills, west of Colo Hwy 93 and north of Colo Hwy 58. Access is by foot via the Golden trail, an urban trail within City of Golden, with its trailhead at 8th St. west of Cheyenne St; bordering park path. Stanley Smookler 240. 23 Sep 2001. ( KHD38242^‡ ) . .

Rudbeckia hirta L.  Black-Eyed Susan. CalPhotos. Jepson eFlora. SEINet Taxon.

- 407 Garden Street, WNS seed 2681. 1/1/2019. WNS seed 2709. 3/21/2019. . .

Scorzonera laciniata L.  (Syn: Podospermum laciniatum (L.) De Candolle ) Cutleaf Vipergrass. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

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).

- Apex Park - Northern Parcel, Also seen or collected nearby: Juniperus scopulorum, Eriogonum alatum, Turritis glabra, Physalis hederifolia, and Erigeron tracyi. 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 Tom Schweich 2299. 26 May 2020. ( JCOS s.n. UCR ) .

- 407 Garden Street, Kathy Hansen-Stamp 2515. 4/28/2022. .

- North Table Mountain, as Podospermum l. 1283. 1283. Kilburn, Paul D., and Sally L. White, 1992 Disturbed trailside with grasses and Tragopogon dubius. Southwest side of North Table Mountain, along City of Golden North Table Mountain Trail, 2.2 km. north of the GNIS location of Golden. Tom Schweich 1399. 8 Jun 2016. ( JCOS s.n. KHD00063987^‡ ) .

- Schweich Hill, Tom Schweich 1527. 3/27/2017. Western section of parcel, which has possibly been revegetated after adjacent home construction. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1623. 15 May 2017. ( CDA0050094^‡ KHD00065498^‡ ) .

- South Table Mountain, South Table Mountain; west side of Quaker Road on east facing roadcut. 13N 0484300E 4398200N. Loraine Yeatts 509. 5/24/1983. ( BRY0115671^‡ COLO00121087^‡ KHD19396^‡ ) Mesatop meadow, abundant and widespread. S Table Mt, near Quaker Rd gate. Mary E. Edwards 1 Jun 1984. ( CS81499^‡ ) .

- Stonebridge Homeowners Association, Tom Schweich, with Ann Norton 2209. 6/12/2021. . .

Senecio eremophilus Richardson var. kingii (Rydb.) Greenm.  (Syn: S. eremophila ssp. kingii (Rydb.) G.W. Douglas & G. Ruyle-Douglas , S. kingii Rydb. ) Cut-Leaved Groundsel. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- North Table Mountain Park, North Table Mountain. Mark Duff 179. 20 Jun 1992. ( COLO00128652^‡ ) . .

Senecio integerrimus Nutt.  Columbia Ragwort. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora. Probably var. exaltatus (Nutt.) Cronquist if infraspecific names are to be applied.

- Apex Park - Northern Parcel, Mixed grass and foothill shrubland, around the edge of a thicket of Prunus americana and Rhus trilobata. Cynoglossum officinale also here. Along the eastern edge of the Apex Park - North parcel, in a little bowl, 4.70 km. south of the GNIS location of Golden. Tom Schweich 2281. 18 May 2020. ( CDA0053735^‡ JCOS s.n. KHD00073454^‡ REGIS ) .

- Colorado School of Mines Survey Field, North-facing slope, above a small stream. 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. Tom Schweich 1637. 25 May 2017. ( CDA0050035^‡ CS EIU KHD00065493^‡ ) Growing in deep grasses and forbs at the base of tall shrubs. 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. Tom Schweich 1897. 28 May 2018. ( COLO02347573^‡ CS ) .

- Eagle Ridge, Tom Schweich 3038. 5/9/2023. Tom Schweich 3173. 5/28/2023. .

- City of Golden Parcel 40-102-01-032, 2743. 6/10/2022. a couple of dense patches, competing with Canada thistle. Tom Schweich 3569. 6/8/2024. .

- Golden, Golden, CO. 13N 0481105E 4400440N. Will C. Ferril 16 May 1901. ( KHD17267^‡ ) .

- Lookout Mountain, In dry, rocky ponderosa pine forest. Transferred from USGS Herbarium, Denver, CO (2005). Lariat Trail, Lookout Mountain. Hansford T. Shacklette 6676. 19 May 1962. ( COLO00858126^‡ COLO00858142^‡ ) .

- Magpie Gulch, Tom Schweich, with Cindy Trujillo 3191. 5/31/2023. .

- North Table Mountain, 1293. 1293. Kilburn, Paul D., and Sally L. White, 1992 .

- North Table Mountain Park, Numerous plants among short grasses and forbs. Variety exaltatus (Nutt.) Cronquist if infraspecific names are to be applied. 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. Tom Schweich 1811. 10 May 2018. ( CDA0052345^‡ JCOS s.n. KHD00068673^‡ UC ) .

- Schweich Hill, Just a few plants on the eastern slope, in dense smooth brome. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.73 km. north northeast of the GNIS location of Golden. Tom Schweich 1847. 18 May 2018. ( KHD00068675^‡ ) .

- South Table Mountain, On east-facing hill. South Table Mountain; on east slope of hill 6020, northwest of junction of Quaker & Golden Hills Roads. 13N 0484200E 4398900N. Loraine Yeatts 510. 24 May 1983. ( KHD19481^‡ ) A lava capped mesa, basalt flow in Denver formation. Damp area on gentle slope S. of pond; occasional with Symphorcarpos and Rosa sp. S. Table Mt. UTM: 835997. Mary E. Edwards 418. 1 Jun 1983. ( COLO 00129890^‡ ) .

- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2287. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 Tom Schweich, with Ann Norton 2210. 6/12/2021. .

- Tin Cup Ridge, East across US Highway 40 from the Peabody Museum dig at Magic Mountain, which was collected by E. H. Brunquist (1959). 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. Tom Schweich 1108. 14 May 2015. ( CAS KHD56932^‡ OBI82130^‡ UC UCR266078^‡ ) Open grassland. 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. Tom Schweich 1858. 23 May 2018. ( CS EIU JCOS s.n. KHD00068676^‡ OBI149559^‡ UCR ^‡ ) .

- Windy Saddle Park, Tom Schweich 1826. 5/4/2020. Tom Schweich, with Cindy Trujillo 2642. 5/17/2022. . .

Senecio riddellii (Torr. & A. Gray) Greenm. ex L.O. Williams.  Riddell's Ragwort. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Heritage Square, open gnd ca 2 1/2 mi S of Golden. T R70W S10. Ernest H. Brunquist 41. 24 Aug 1959. ( CS23861^‡ ) . .

Senecio spartioides Torr. & A. Gray.  (Syn: S. multicapitatus Greenm. ex Rydb. ) Broomlike Ragwort. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Perennial herb, to 50 cm.; Leaves, basal, unknown, cauline, alternate, 90 mm. × 3 mm. wide, narrowly oblanceolate, reduced above to 30 mm. × 1 mm. wide, variously hairy in axils and ±lower surface; Involucre, 12.5 mm. × 6 mm., narrowly campanulate, bractlets not prominent; Phyllaries, 2 series? or 1 series with 2 forms? outer, 7.5 mm. × 0.7 mm. wide, all green, inner, 7.5 mm. × 1.3 mm. wide, centrally green with margins chartaceous, all tips dark; Receptacle, epaleate; Rays, fertile, corolla, tube 5 mm. + blade 9 mm. × 2 mm. wide, yellow, lobes 3; Disk flowers, corolla, 6 mm., yellow; Pappus, 1 series of fine capillary bristles, 5 mm.; Cypsela, 4 mm., 5-angled, dark gray, “hirtellous” throughout (not just the angles). Described from Coll. No. 1298, 23 Sep 2015.

- Apex Park - Northern Parcel, Flowers not open. Tom Schweich 1993. 8/19/2020. .

- Colorado School of Mines Survey Field, Tom Schweich 3366. 8/27/2023. iNaturalist Observation 183711336. Tom Schweich 3406. 9/17/2023. .

- Golden, United States of America, Colorado, Golden N. L. Britton 8 Oct 1882. ( NY3088845^‡ ) .

- 407 Garden Street, Kathy Hansen-Stamp 2519. 4/28/2022. .

- North Table Mountain, 1126. 1126. Zeise, Larry Steven, 1976 1294. 1294. Kilburn, Paul D., and Sally L. White, 1992 .

- North Table Mountain Park, Mixed grasses, forbs and small shrubs. 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. Tom Schweich 1538. 18 Aug 2016. ( JCOS s.n. KHD00063457^‡ ) Growing next to Coll. No. 1319, Ribes aureum, 4 May 2016. 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. Tom Schweich 1545. 1 Sep 2016. ( CS EIU JCOS s.n. KHD00063967^‡ OBI83344^‡ ) .

- Schweich Hill, Near top of hill, in some of the least-disturbed native vegetation. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 1.75 km. northwest of the GNIS location of Golden. Tom Schweich 1755. 31 Aug 2017. ( CAS CDA0052331^‡ KHD00065160^‡ ) Remnant mixed-grass prairie, also collected nearby: Hymenopappus filifolius, Oxytropis lambertii, Eriogonum effusum and Carex inops var. heliophila. Small (4 acre) fallow city-owned parcel in northern Golden, near the intersection of Colorado Highway 93 and Washington Avenue, 2.31 km. north northwest of the GNIS location of Golden. Near top of hill, central part of the parcel. Tom Schweich 2231. 12 Sep 2019. ( COLO2433589^‡ CS EIU REGIS ) .

- South Table Mountain, South-facing slope below mesa edge. South Table Mountain; below mesa edge, west of Quaker Road. 13N 0484200E 4399200N. Loraine Yeatts 833. 9 Sep 1983. ( KHD19480^‡ ) .

- 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. Tom Schweich 1298. 23 Sep 2015. ( JCOS s.n. KHD56980^‡ UC UCR267491^‡ ) . .

Senecio wootonii Greene.  Wooton's Ragwort. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

- Golden, Golden, Foothills north of Golden, CO. 13N 0481338E 4401747N. Helen Marsh Zeiner 5610. 24 May 1919. ( KHD4279^‡ ) . .

Perennial herbs; leaves alternate, simple; heads radiate; involucre bracts imbricate in several series or not much imbricate, more or less chartaceous at the base with green tips; receptacle naked; disk flowers yellow; ray flowers white; pappus of capillary bristles; achenes subterete or angled, short-pubescent to glabrous. (Croat, 1972; Nesom, 1993, 1999; Taylor &Taylor 1983; 1984)

1a. Involucre bracts with 3-5 parallel veins; heads in a flat-topped corymbiform inflorescence; plants densely pubescent with short, spreading hairs; leaves uninerved, elliptic-oblong to broadly ovate, Clear Creek Canyon, Ranson/Edwards ... S. rigida var. humilis

1b. Involucre bracts without parallel veins; heads in a paniculate or thyrsiform inflorescence; plants variously pubescent but usually not densely so with short, spreading hairs; leaves often trinerved, variously shaped ... 2

2a. Leaves glabrous or with ciliate leaf margins; stems glabrous or occasionally minutely hairy above or in the inflorescence... 3

2b. Leaves puberulent to hirsute (at least below), the margins ciliate or not; stems evenly short-hairy to hirsute, sometimes glabrate toward the base ... 6

3a. Leaves mostly 3-nerved (the middle nerve the strongest with 2 fainter lateral nerves from the leaf base, sometimes just the upper uninerved), narrowly elliptic to lanceolate or broadly linear ... 4

3b. Leaves uninerved, at least the lower oblanceolate to obovate or ovate to broadly lanceolate ... 5

4a. Leaf margins sharply serrate for at least 1/2 the length of the leaf; plants (5) 10-15 dm or more tall; achenes short-hairy, Wet soil Apex Gulch ... S. gigantea

4b. Leaf margins entire or (especially those of the lower leaves) remotely toothed (on the upper 1/3 of the leaf or less), rarely toothed for 1/2 of the margin or more; plants generally shorter, 1.5-9 dm; achenes glabrous or occasionally sparsely hairy, commonly collected around Golden, Ranson/Edwards ... S. missouriensis

5a. Lower and basal leaves oblanceolate to spatulate or obovate; disk flowers 8-17 (25); achenes hairy, Apex Gl., Lookout Mtn ... S. simplex var. simplex

5b. Lower and basal leaves ovate to broadly lanceolate or oblong; disk flowers usually 4 or 5 but rarely up to 11; achenes glabrous, North Table(?), Ranson/Edwards ... S. speciosa var. pallida

6a. Basal leaves well-developed and present at flowering time, the stem leaves smaller than the basal and progre reduced in size upward (note that specimens collected late in the season may have withered basal leaves) ... 7

6b. Leaves mainly all cauline without well-developed basal leaves present at flowering time, these not greatly reduced in size upward ... 8

7a. Disk flowers 8-20, greater than the number of ray flowers, commonly collected around Golden, Ranson/Edwards ... S. nana

7b. Disk flowers 3-6 (9), fewer than or equal to the number of ray flowers, Lookout Mountain ... S. nemoralis var. decemflora

8a. Leaves 1-nerved or rarely obscurely 3-nerved, the margins mostly entire; involucre bracts not viscid with granular or minutely stipitate glands ... S. nemoralis var. decemflora

8b. Leaves 3-nerved, rarely obscurely so, the margins serrate to irregularly toothed (at least remotely so); most leaves sharply serrate for 1/2 of the margin or more, linear-lanceolate to lanceolate; ray flowers mostly 13, ranging from (5) 10-18, cultivated, South Table ... S. canadensis

Abstracted from Ackerfield (2015) for taxa found in Golden and vicinity.

Solidago L.  Goldenrod. CalPhotos. Jepson eFlora. SEINet Taxon.

- 407 Garden Street, Kathy Hansen-Stamp 2520. 4/28/2022. .

- Stonebridge Homeowners Association, Susan Panjabi, Jessica Smith, Zac Wilson, and Tom Schweich 2288. 7/24/2020. Sovell, John R., and Susan S. Panjabi, 2021 . .

Solidago canadensis L.  Canada Goldenrod. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora. May not be native to Colorado, many differing opinions as to nomenclature.

- Golden, Golden. Flower garden. J. H. Ehlers 8337. 15 Sep 1941. ( COLO00134510^‡ MICH1006071^‡ ) .

- South Table Mountain, In ditch, roadside. South Table Mountain, along Quaker Road. 13N 0484300E 4399100N. Loraine Yeatts 818. 29 Aug 1983. ( BRYV278879^‡ KHD19478^‡ ) . [ BRYV278879 remains determined S. sparsiflora A. Gray. ] .

Solidago gigantea Aiton.  Giant Goldenrod. CalPhotos. Jepson eFlora. SEINet Taxon. Golden Flora.

Perennial herb, 60 cm. (growing on a steep stream bank); Stem, glabrous, becoming hairy in the inflorescence; Leaves, basal unknown, cauline, alternate, petiole, 5 mm. or subsessile, blade, 90 mm. × 15 mm. wide, distally reduced in size but abundant, lanceolate-elliptic, entire, ciliate with small curved hairs, distally widely-spaced serrate; Inflorescence, pyramidal, paniculate, ±secund; Peduncles, 3-5 mm.; Involucre, 3 mm. × 4 mm. wide, spheric(?), lightly glandular; Phyllaries, unequal, 2+ series, lower <rest of involucre, green to chartaceous, margins flat; Receptacle, very short scales(?), definitely not flat; Flowers, of 2 kinds; Rays, #11, tube 2 mm. + blade 1.5 mm. × 0.3 mm. wide, yellow, fertile; Disk flowers, #7 tube 2.8 mm. + lobes 0.9 mm., throat expanding gradually, yellow, open, bisexual; Pappus, bristles, 2.8 mm., equal; Stamens, not tailed; Style, 2-branched, ±brushlike appendages; Stigma, 0.5 mm., >style appendages (0.4 mm.); Fruit, 1 mm., hairy, beak-less (Described from Coll. No. 2422, 17 Aug 2020).