Oxalis strictaL.

upright yellow woodsorrel

WFO wfo-0000387064 Accepted WFO 2026-06 8 photographs CC0 / CC BY In the accuracy benchmark

Plate 1 figs. a–h

Oxalis stricta, photographed by Aleksei Baushev
fig. a Aleksei Baushev, CC BY 4.0 / 2022-06-11 / obs. 205247210
Oxalis stricta, photographed by Pavel Kacl
fig. b Pavel Kacl, CC BY 4.0 / obs. 203180961
Oxalis stricta, photographed by Pavel Kacl
fig. c Pavel Kacl, CC BY 4.0 / obs. 205682979
Oxalis stricta, photographed by Ryan Sorrells
fig. d Ryan Sorrells, CC BY 4.0 / obs. 203401764
Oxalis stricta, photographed by aga_l_
fig. e aga_l_, CC BY 4.0 / obs. 202991943
Oxalis stricta, photographed by aga_l_
fig. f aga_l_, CC BY 4.0 / obs. 199111715
Oxalis stricta, photographed by Liubov Ilminska
fig. g Liubov Ilminska, CC0 1.0 / obs. 201684866
Oxalis stricta, photographed by Dave Behm
fig. h Dave Behm, CC0 1.0 / obs. 201252835

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 = 3,080 observations

Peak flowering in Aug, from 3,080 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 86 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.

  • Acetosella chinensis (Haw. ex G.Don) Kuntze
  • Acetosella fontana (Bunge) Kuntze
  • Acetosella stricta (L.) Kuntze
  • Ceratoxalis coloradensis (Rydb.) Lunell
  • Ceratoxalis cymosa (Small) Lunell
  • Ceratoxalis stricta (L.) Lunell
  • Oxalis ambigua Salisb.
  • Oxalis bushii Small
  • Oxalis chinensis Haw. ex G.Don
  • Oxalis coloradensis Rydb.
  • Oxalis corniculata prol. navieri (Jord.) Rouy
  • Oxalis corniculata prol. stricta (L.) Rouy
  • Oxalis corniculata subsp. navieri (Jord.) Tourlet
  • Oxalis corniculata subsp. stricta (L.) Bonnier & Layens
  • Oxalis corniculata subvar. piletocarpa (Wiegand) Farw.
  • Oxalis corniculata var. longepedunculata (Sennen) R.Knuth
  • Oxalis corniculata var. stricta (L.) Sav.
  • Oxalis corniculata var. stricta (L.) C.C.Huang & L.R.Xu
  • Oxalis cymosa Small
  • Oxalis dillenii var. piletorum (Wiegand) Priszter
  • Oxalis europaea Jord.
  • Oxalis europaea f. cymosa (Small) Wiegand
  • Oxalis europaea f. pallidiflora Fernald
  • Oxalis europaea f. pilosella Wiegand

and 62 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.