Taraxia subacaulisRydb.

diffuseflower evening primrose

WFO wfo-0001235249 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h · 8 separate observations

Taraxia subacaulis, photographed by Trevor Van Loon
fig. a Trevor Van Loon, CC BY 4.0 / 2022-05-31 / obs. 202327141
Taraxia subacaulis, photographed by Drew Meyer
fig. b Drew Meyer, CC0 1.0 / obs. 134872620
Taraxia subacaulis, photographed by Drew Meyer
fig. c Drew Meyer, CC0 1.0 / obs. 133933727
Taraxia subacaulis, photographed by Mitch Van Dyke
fig. d Mitch Van Dyke, CC BY 4.0 / obs. 134197455
Taraxia subacaulis, photographed by joergmlpts
fig. e joergmlpts, CC BY 4.0 / obs. 19552135
Taraxia subacaulis, photographed by Wendy McCrady
fig. f Wendy McCrady, CC BY 4.0 / obs. 176042955
Taraxia subacaulis, photographed by Wendy McCrady
fig. g Wendy McCrady, CC BY 4.0 / obs. 176036641
Taraxia subacaulis, photographed by Matt Berger
fig. h Matt Berger, CC BY 4.0 / obs. 203383547

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 9 botanical countries

Regions where Taraxia subacaulis is native: California, Colorado, Idaho, Montana, Nevada, Oregon, Utah, Washington, Wyoming CaliforniaColoradoIdahoMontanaNevadaOregonUtahWashingtonWyoming
Native distribution of Taraxia subacaulis, 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
Colorado COL
Idaho IDA
Montana MNT
Nevada NEV
Oregon ORE
Utah UTA
Washington WAS
Wyoming WYO

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.

  • Camissonia subacaulis (Pursh) P.H.Raven
  • Jussiaea subacaulis Pursh
  • Oenothera heterantha Nutt.
  • Oenothera heterantha var. taraxacifolia S.Watson
  • Oenothera primuloidea H.Lév.
  • Oenothera subacaulis (Pursh) Jeps.
  • Oenothera subacaulis var. taraxacifolia (S.Watson) Jeps.
  • Oenothera taraxacifolia H.Lév. & Guffroy
  • Oenothera taraxacifolia var. caulescens H.Lév.
  • Oenothera triloba Hook.
  • Taraxia heterantha (Nutt.) Small
  • Taraxia heterantha var. taraxacifolia (S.Watson) Small
  • Taraxia taraxacifolia (S.Watson) A.Heller

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.