Descurainia pinnata(Walter) Britton

Western Tansymustard

WFO wfo-0000641952 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Descurainia pinnata, photographed by Millie Basden
fig. a Millie Basden, CC BY 4.0 / 2022-05-01 / obs. 193391189
Descurainia pinnata, photographed by Millie Basden
fig. b Millie Basden, CC BY 4.0 / obs. 193352537
Descurainia pinnata, photographed by Cleveland Powell
fig. c Cleveland Powell, CC BY 4.0 / obs. 192699827
Descurainia pinnata, photographed by Arvel Hernandez
fig. d Arvel Hernandez, CC BY-SA 4.0 / obs. 180360463
Descurainia pinnata, photographed by James Fowler
fig. e James Fowler, CC BY 4.0 / obs. 121932858
Descurainia pinnata, photographed by Sam Kieschnick
fig. f Sam Kieschnick, CC BY 4.0 / obs. 122647339
Descurainia pinnata, photographed by Nick Loveland
fig. g Nick Loveland, CC0 1.0 / obs. 66431200
Descurainia pinnata, photographed by Dan Horowitz
fig. h Dan Horowitz, CC0 1.0 / obs. 66858766

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.

Confused withby our own model

These are not lookalikes we guessed at. Each one is a species our identification model genuinely mistook for this plant, and how many times. The error rate is published.

Flowering n = 1,158 observations

Peak flowering in Mar, from 1,158 community-annotated observations worldwide. This is a global aggregate, not a forecast for your garden: the same species flowers on different dates in different hemispheres, and citizen-science records cluster near cities, at weekends, and in spring. Where a species has fewer than 30 annotated records we do not draw this chart at all.

Also published as 58 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.

  • Cardamine menziesii DC.
  • Cardamine multifida Pursh
  • Crucifera multifida E.H.L.Krause
  • Descurainia andrenarum (Cockerell) Cory
  • Descurainia brachycarpa O.E.Schulz
  • Descurainia brachycarpa var. eglandulosa (Thell.) O.E.Schulz
  • Descurainia canescens (Nutt.) Prantl
  • Descurainia canescens var. andina Hauman
  • Descurainia halictorum O.E.Schulz
  • Descurainia intermedia Daniels
  • Descurainia magna (Rydb.) F.C.Gates
  • Descurainia menziesii (DC.) O.E.Schulz
  • Descurainia menziesii var. glandulosa O.E.Schulz
  • Descurainia menziesii var. ochroleuca (Wooton) O.E.Schulz
  • Descurainia menziesii var. villosa O.E.Schulz
  • Descurainia multifida (Pursh) O.E.Schulz
  • Descurainia multifoliata Cory
  • Descurainia pinnata f. simplex O.E.Schulz
  • Descurainia pinnata subsp. halictorum (Cockerell) Detling
  • Descurainia pinnata subsp. intermedia (Rydb.) Detling
  • Descurainia pinnata var. brachycarpa (Richardson) Fernald
  • Descurainia pinnata var. glabra (Wooton & Standl.) Shinners
  • Descurainia pinnata var. intermedia (Rydb.) C.L.Hitchc.
  • Descurainia pinnata var. ochroleuca (Wooton) Shinners

and 34 more.

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.

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