Robinia pseudoacaciaL.

black locust

WFO wfo-0000213931 Accepted WFO 2026-06 7 photographs CC0 / CC BY

Plate 1 figs. a–g

Robinia pseudoacacia, photographed by Alexis Tinker-Tsavalas
fig. a Alexis Tinker-Tsavalas, CC BY 4.0 / 2022-06-11 / obs. 205408903
Robinia pseudoacacia, photographed by Benoit Renaud
fig. b Benoit Renaud, CC BY 4.0 / obs. 205233017
Robinia pseudoacacia, photographed by Pavel Kacl
fig. c Pavel Kacl, CC BY 4.0 / obs. 205684245
Robinia pseudoacacia, photographed by Alexis Tinker-Tsavalas
fig. d Alexis Tinker-Tsavalas, CC BY 4.0 / obs. 205535139
Robinia pseudoacacia, photographed by Bex Goreham
fig. e Bex Goreham, CC BY 4.0 / obs. 205328363
Robinia pseudoacacia, photographed by Natalie Waddell-Rutter
fig. f Natalie Waddell-Rutter, CC BY 4.0 / obs. 205319709
Robinia pseudoacacia, photographed by Pete Bradshaw
fig. g Pete Bradshaw, CC BY 4.0 / obs. 204424425

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 = 5,410 observations

Peak flowering in May, from 5,410 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 117 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.

  • Aeschynomene pseudoacacia Roxb. ex DC.
  • Derris robusta var. assamica Thoth.
  • Pseudacacia odorata Moench
  • Pseudacacia vulgaris Tourn. ex Greene
  • Pseudo-acacia vulgaris Medik.
  • Robinia acacia L.
  • Robinia amorphifolia K.Koch
  • Robinia angulata K.Koch
  • Robinia aurea K.Koch
  • Robinia bessoniana K.Koch
  • Robinia bullata K.Koch
  • Robinia camusetii Leroy ex K.Koch
  • Robinia coluteoides K.Koch
  • Robinia cornigera K.Koch
  • Robinia crispa K.Koch
  • Robinia cylindrica K.Koch
  • Robinia decaisneana Verl.
  • Robinia dissecta Verl.
  • Robinia echinata Mill.
  • Robinia edwardsiifolia Verl.
  • Robinia fastigiata Verl.
  • Robinia fastigiataaureovariegata Jacob-Makoy
  • Robinia fragilis Salisb.
  • Robinia inermis Jacq.

and 93 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.