Cardamine hirsutaL.

hairy bittercress

WFO wfo-0000586924 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Cardamine hirsuta, photographed by Pavel Kacl
fig. a Pavel Kacl, CC BY 4.0 / 2022-05-26 / obs. 200803246
Cardamine hirsuta, photographed by Pavel Kacl
fig. b Pavel Kacl, CC BY 4.0 / obs. 202554501
Cardamine hirsuta, photographed by Pavel Kacl
fig. c Pavel Kacl, CC BY 4.0 / obs. 199431539
Cardamine hirsuta, photographed by Jon Sullivan
fig. d Jon Sullivan, CC BY 4.0 / obs. 195887627
Cardamine hirsuta, photographed by Leanne Dempsey
fig. e Leanne Dempsey, CC BY 4.0 / obs. 196384908
Cardamine hirsuta, photographed by Pavel Kacl
fig. f Pavel Kacl, CC BY 4.0 / obs. 197196345
Cardamine hirsuta, photographed by John G. Phillips
fig. g John G. Phillips, CC BY 4.0 / obs. 198920157
Cardamine hirsuta, photographed by Dilrukshan Priyantha Wijesinghe
fig. h Dilrukshan Priyantha Wijesinghe, CC BY 4.0 / obs. 199246748

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.

Flowering n = 5,785 observations

Peak flowering in Mar, from 5,785 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 38 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.

  • Arabis heterophylla Forst. ex DC.
  • Cardamine angulata Regel
  • Cardamine borbonica Bojer
  • Cardamine fagetina Schur
  • Cardamine hirsuta f. apetala Soó
  • Cardamine hirsuta f. glabra Schweinf.
  • Cardamine hirsuta f. grandiflora O.E.Schulz
  • Cardamine hirsuta f. litoralis (Svalund) O.E.Schulz
  • Cardamine hirsuta f. pilosa (O.E.Schulz) Kuusk
  • Cardamine hirsuta f. umbrosa Chiov.
  • Cardamine hirsuta f. unicaulis (O.E.Schulz) Jovan.-Dunj.
  • Cardamine hirsuta subsp. hirsuta L.
  • Cardamine hirsuta subsp. puberula (Rouy & Foucaud) O.E.Schulz
  • Cardamine hirsuta var. apetala Soó
  • Cardamine hirsuta var. exigua O.E.Schulz
  • Cardamine hirsuta var. hirsuta L.
  • Cardamine hirsuta var. litoralis Svalund
  • Cardamine hirsuta var. maxima Fisch.
  • Cardamine hirsuta var. montana Macoun
  • Cardamine hirsuta var. petiolulata O.E.Schulz
  • Cardamine hirsuta var. pilosa O.E.Schulz
  • Cardamine hirsuta var. tetrandra Stokes
  • Cardamine hirsuta var. unicaulis O.E.Schulz
  • Cardamine humilis Kit.

and 14 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.