Psorothamnus polydenius(Torr.) Rydb.

Nevada dalea

WFO wfo-0000169528 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h · 8 separate observations

Psorothamnus polydenius, photographed by Tim Messick
fig. a Tim Messick, CC BY 4.0 / 2022-05-20 / obs. 202511544
Psorothamnus polydenius, photographed by Tim Messick
fig. b Tim Messick, CC BY 4.0 / obs. 153961633
Psorothamnus polydenius, photographed by Tim Messick
fig. c Tim Messick, CC BY 4.0 / obs. 128287015
Psorothamnus polydenius, photographed by Quinn Campbell
fig. d Quinn Campbell, CC0 1.0 / obs. 67640084
Psorothamnus polydenius, photographed by Ken-ichi Ueda
fig. e Ken-ichi Ueda, CC BY 4.0 / obs. 47158074
Psorothamnus polydenius, photographed by Dominic Gentilcore
fig. f Dominic Gentilcore, CC BY 4.0 / obs. 83294721
Psorothamnus polydenius, photographed by Jim Morefield
fig. g Jim Morefield, CC BY 4.0 / obs. 102576852
Psorothamnus polydenius, photographed by Marcus Tamura
fig. h Marcus Tamura, CC0 1.0 / obs. 22569181

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Native range 3 botanical countries

Regions where Psorothamnus polydenius is native: California, Nevada, Utah CaliforniaNevadaUtah
Native distribution of Psorothamnus polydenius, after Kew’s World Checklist of Vascular Plants. Introduced, extinct and doubtful records are excluded, so this is where the plant is from, not everywhere it now grows.
RegionTDWG codeContinent
California CAL NORTHERN AMERICA
Nevada NEV
Utah UTA

Region boundaries approximated from Natural Earth (public domain) and mapped to TDWG World Geographical Scheme for Recording Plant Distributions (WGSRPD) level-3 botanical countries (Brummitt 2001). Indicative, not the official WGSRPD geometry.

Also published as 8 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

  • Dalea nummularia M.E.Jones
  • Dalea polydenia Torr.
  • Dalea polydenia S.Watson
  • Dalea polydenia var. subnuda S.Watson
  • Parosela polydenia (Torr.) A.Heller
  • Parosela polydenia var. subnuda (S.Watson) Parish
  • Psorothamnus nummularius (M.E.Jones) S.L.Welsh
  • Psorothamnus subnudus (S.Watson) Rydb.

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
  3. Wikidata. common name (P1843), joined on the World Flora Online identifier (P7715). CC0. Retrieved 2026-07-13.
  4. Kew, World Checklist of Vascular Plants (WCVP v16). native distribution by TDWG level-3 botanical country, and life form. CC BY 3.0. Retrieved 2026-06-04.

We publish what we can source and we say so when we cannot. This page has no care advice and no toxicity claim, because we do not yet have those from a source we can cite.