<b>DeLong Park (City of Golden)</b>, Jefferson County, Colorado.

Eastern Mojave Vegetation

DeLong Park (City of Golden), Jefferson County, Colorado.

Query:

New park in Golden, at 23rd Street and Vernon Drive.

Some descriptions of this location:

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

Latitude: 39.748646 Longitude: -105.208176 (° decimal)
Elevation: 5778ft, 1761m.

Articles that refer to this location:

23rd Street, Golden, Jefferson County, Colorado: at DeLong Park;
Checklist Flora of Native and Naturalized Vascular Plants of Golden and Vicinity, Jefferson County, Colorado: Comandra umbellata ssp. pallida; Solanum elaeagnifolium; Cenchrus longispinus; Linaria dalmatica; Bothriochloa bladhii;
Field Notes: 6 May 2022; 7 Jun 2022; 18 Aug 2022; 30 Mar 2023; 22 Apr 2023; 25 May 2023; 15 Jun 2023; 29 June 2023; 6 Jul 2023; 22 Jul 2023; 30 Jul 2024; Obs. No. 3817, 30 Jul 2024.; 13 Aug 2024; 20 Aug 2024; Coll. No. 3384, 24 Sep 2024;

Literature Referring To This Location:

Fernald, M. L. 1943. Virginian Botanizing Under Restrictions. Rhodora; Journal of the New England Botanical Club. 45(538):357-412. https://www.biodiversitylibrary.org/page/609801#page/404/

Area Plant Lists that contain this location:

Area Plant List for Golden.
Area Plant List for DeLong Park (City of Golden).

Species collected at or near this location.

This list summarizes plants collected or observed at this specific, named location. It does not include plants collected or observed at nearby named or unnamed locations. It may be more instructive to use the Area Lists that contain this location.

TAS – The plant was collected by Tom Schweich.
Oth – The plant was collected by someone, but not Tom.
Obs – The plant was observed, but not collected.

Apiaceae

Conium maculatum L. Common Poison Hemlock (TAS)

Asteraceae

Ambrosia acanthicarpa Hook. Flat-Spine Burr-Ragweed (TAS)

Ambrosia psilostachya DC. Western Ragweed (TAS)

Arctium minus Bernh. Lesser Burdock (Obs)

Cirsium arvense (L.) Scop. Canada Thistle (TAS)

Conyza canadensis (L.) Cronquist. Canadian Horseweed (Obs)

Ericameria nauseosa (Pall. ex Pursh) G.L.Nesom & G.I.Baird graveolens (Nutt.) Reveal & Schuyler. Goldy-Locks (Obs)

Ericameria nauseosa (Pall. ex Pursh) G. I. Nesom & G. I. Baird nauseosa. Rubber Rabbitbush (Obs)

Helianthus pumilus Nutt. Little Sunflower (TAS)

Heterotheca villosa (Pursh) Shinners. Hairy False Goldenaster (Obs)

Lactuca serriola L. Prickly Lettuce (TAS)

Onopordum acanthium L. Scotch Cottonthistle (TAS)

Sonchus arvensis L. Field Sowthistle (Obs)

Taraxacum officinale F. H. Wigg. Common Dandelion (Obs)

Boraginaceae

Ellisia nyctelea (L.) L. Aunt Lucy (Obs)

Brassicaceae

Capsella bursa-pastoris (L.) Medik. Shepherd's Purse (TAS)

Chorispora tenella (Pall.) DC. Crossflower (TAS)

Descurainia incisa (Engelm.) Britton incisa. Mountain Tansymustard (TAS)

Hesperis matronalis L. Dame's Rocket (Obs)

Lepidium draba L. White Top, Hoary Cress (TAS)

Cactaceae

Opuntia macrorhiza Engelm. Western Pricklypear (Obs)

Campanulaceae

Campanula rapunculoides L. Rampion Bellflower (Obs)

Caprifoliaceae

Knautia macedonica Griesb. Macedonian scabious (TAS)

Lonicera tatarica L. Tatarian Honeysuckle (TAS)

Chenopodiaceae

Cycloloma atriplicifolium (Spreng.) J. M. Coult. Winged-Pigweed (TAS)

Chenopodium album L. Lambsquarters (TAS)

Kochia scoparia (L.) Schrad. Common Red Sage (TAS)

Salsola tragus L. Tumbleweed (Obs)

Convolvulaceae

Convolvulus arvensis L. Field Bindweed (TAS)

Euphorbiaceae

Euphorbia esula L. Leafy Spurge (Obs)

Euphorbia myrsinites L. Myrtle Spurge (TAS)

Fabaceae

Lathyrus latifolius L. Perennial Pea Vine (TAS+Obs)

Melilotus officinalis (L.) Lam. Yellow Sweet Clover (TAS+Obs)

Securigera varia (L.) Lassen. Purple Crownvetch (TAS+Obs)

Trifolium repens L. White Clover (TAS)

Geraniaceae

Erodium cicutarium (L.) L'Her. ex Aiton. Hemlock-leav'd Crane's-bill (TAS)

Grossulariaceae

Ribes cereum Douglas. Wax Currant (Obs)

Lamiaceae

Lamium amplexicaule L. Henbit (TAS)

Nepeta racemosa Lam. Persian Catmint (TAS)

Malvaceae

Malva neglecta Wallr. Common Mallow (Obs)

Oleaceae

Fraxinus pennsylvanica Marshall. Green Ash (TAS)

Onagraceae

Oenothera suffrutescens (Ser.) W. L. Wagner & Hoch. Linda Tarde (Obs)

Papaveraceae

Eschscholzia californica Cham. California Poppy (TAS+Obs)

Plantaginaceae

Linaria dalmatica (L.) Mill. Dalmatian ToadFlax (Obs)

Plantago lanceolata L. Narrowleaf Plantain (Obs)

Polygonaceae

Polygonum aviculare L. Prostrate Knotweed (TAS)

Rumex crispus L. Curley Dock (TAS)

Ranunculaceae

Ranunculus testiculatus Crantz. Bur Buttercup (TAS)

Rubiaceae

Galium aparine L. Sticky Willy, Cleavers (Obs)

Santalaceae

Comandra umbellata (L.) Nutt. pallida (A. DC.) Piehl. Pale Bastard Toadflax (Obs)

Scrophulariaceae

Scrophularia lanceolata Pursh. Lanceleaf Figwort (Obs)

Solanaceae

Solanum elaeagnifolium Cav. Silverleaf Nightshade (Obs)

Solanum rostratum Dunal. Buffalo Bur Nightshade (Obs)

Solanum triflorum Nutt. Cutleaf Nightshade (Obs)

Ulmaceae

Ulmus pumila L. Siberian Elm (Obs)

Verbenaceae

Verbena bracteata Lag. & Rodr. Large Bract Vervain (Obs)

Zygophyllaceae

Tribulus terrestris L. Puncture Vine (Obs)

Cyperaceae

Carex inops L.H. Bailey heliophila (Mack.) Crins. Sun Sedge (Obs)

Poaceae

Agropyron cristatum (L.) Gaertn. Crested Wheat Grass (TAS)

Andropogon gerardii Vitman. Big Bluestem (TAS+Obs)

Bromus japonicus Thunb. Japanese Cheat Grass (TAS+Obs)

Bromus tectorum L. Cheat Grass (Obs)

Bothriochloa bladhii (Retz.) S.T. Blake. Australian bluestem, Caucasian Bluestem (TAS)

Cenchrus longispinus (Hack.) Fern. Longspine Sandbur (TAS)

Dactylis glomerata L. Orchard Grass (TAS+Obs)

Elymus canadensis L. Canadian Wildrye (TAS)

Echinochloa crus-galli (L.) P. Beauv. Barnyardgrass (TAS)

Eragrostis cilianensis (All.) Vignolo ex Janch. Stinkgrass (TAS)

Hesperostipa comata (Trin. & Rupr.) Barkworth. Needle and Thread (Obs)

Lolium multiflorum Lam. Annual Ryegrass (TAS)

Nassella viridula (Trin.) Barkworth. Green Needlegrass (TAS)

Panicum miliaceum L. Proso Millet (TAS)

Poa annua L. Annual Blue Grass (Obs)

Poa bulbosa L. Bulbous Bluegrass (Obs)

Secale cereale L. Cereal Rye (TAS)

Setaria viridis (L.) P. Beauv. Green Bristlegrass (Obs)

Triticum aestivum L. Wheat (Obs)

Total number of taxa:	77
Native Taxa: (serif, italic, bold)	23
Exotic Taxa: (sans-serif, italic)	54
Nativity Undetermined: (default font, italic)	0
Listed Weeds: Identified as Weed	0

If you have a question or a comment you may write to me at: tomas@schweich.com I sometimes post interesting questions in my FAQ, but I never disclose your full name or address.

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Date and time this article was prepared:3:01:24 PM, 5/12/2025.