Staphylea trifoliaL.

American bladdernut

WFO wfo-0001140500 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Staphylea trifolia, photographed by Ryan Sorrells
fig. a Ryan Sorrells, CC BY 4.0 / 2022-05-26 / obs. 200863153
Staphylea trifolia, photographed by Craig Martin
fig. b Craig Martin, CC0 1.0 / obs. 203969643
Staphylea trifolia, photographed by Craig Martin
fig. c Craig Martin, CC0 1.0 / obs. 203342226
Staphylea trifolia, photographed by Joseph Aubert
fig. d Joseph Aubert, CC BY 4.0 / obs. 196195645
Staphylea trifolia, photographed by Howard Williams
fig. e Howard Williams, CC BY-SA 4.0 / obs. 199154383
Staphylea trifolia, photographed by Mike B
fig. f Mike B, CC BY-SA 4.0 / obs. 199736921
Staphylea trifolia, photographed by Craig Martin
fig. g Craig Martin, CC0 1.0 / obs. 201062859
Staphylea trifolia, photographed by John Abrams
fig. h John Abrams, CC BY 4.0 / obs. 192437024

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 = 3,409 observations

Peak flowering in Apr, from 3,409 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 8 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.

  • Staphylea brighamii J.F.Macbr.
  • Staphylea trifolia f. pyriformis Dore
  • Staphylea trifolia f. trifolia
  • Staphylea trifolia var. pauciflora (Zabel) Rehder
  • Staphylea trifolia var. typica C.K.Schneid.
  • Staphylea trifoliata (Crantz) Weston
  • Staphylea trifoliata var. pauciflora Zabel
  • Staphylodendron trifoliatum Crantz

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.