Astragalus atratusS.Watson

mourning milkvetch

WFO wfo-0000168893 Accepted WFO 2026-06 8 photographs CC BY

Plate 1 figs. a–h · 8 separate observations

Astragalus atratus, photographed by Matt Berger
fig. a Matt Berger, CC BY 4.0 / 2021-05-25 / obs. 131821188
Astragalus atratus, photographed by Matt Berger
fig. b Matt Berger, CC BY 4.0 / obs. 131806140
Astragalus atratus, photographed by Matt Berger
fig. c Matt Berger, CC BY 4.0 / obs. 130381299
Astragalus atratus, photographed by Matt Berger
fig. d Matt Berger, CC BY 4.0 / obs. 130381375
Astragalus atratus, photographed by Matt Berger
fig. e Matt Berger, CC BY 4.0 / obs. 130373633
Astragalus atratus, photographed by Matt Berger
fig. f Matt Berger, CC BY 4.0 / obs. 130373749
Astragalus atratus, photographed by Matt Berger
fig. g Matt Berger, CC BY 4.0 / obs. 86100878
Astragalus atratus, photographed by Matt Berger
fig. h Matt Berger, CC BY 4.0 / obs. 131807875

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 4 botanical countries

Regions where Astragalus atratus is native: California, Idaho, Nevada, Oregon CaliforniaIdahoNevadaOregon
Native distribution of Astragalus atratus, 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
Idaho IDA
Nevada NEV
Oregon ORE

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 13 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.

  • Astragalus atratus var. arctus E.Sheld.
  • Astragalus atratus var. mensanus M.E.Jones
  • Astragalus atratus var. phyllophorus M.E.Jones
  • Astragalus atratus var. stenophyllus M.E.Jones
  • Astragalus mensanus (M.E.Jones) Abrams
  • Astragalus mensarus (M.E.Jones) Abrams
  • Astragalus owyheensis A.Nelson & J.F.Macbr.
  • Hamosa atrata (S.Watson) Rydb.
  • Tium atratum (S.Watson) Rydb.
  • Tium mensanum (M.E.Jones) Rydb.
  • Tium mensarum (M.E.Jones) Rydb.
  • Tium owyheense (A.Nelson & J.F.Macbr.) Rydb.
  • Tragacantha atrata (S.Watson) Kuntze

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.