Fremontodendron californicum(Torr.) Coville

California flannelbush

WFO wfo-0000692260 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Fremontodendron californicum, photographed by Brendan Black
fig. a Brendan Black, CC BY-SA 4.0 / 2022-05-24 / obs. 200397350
Fremontodendron californicum, photographed by velodrome
fig. b velodrome, CC BY 4.0 / obs. 202092546
Fremontodendron californicum, photographed by markhl
fig. c markhl, CC0 1.0 / obs. 201738329
Fremontodendron californicum, photographed by George Williams
fig. d George Williams, CC BY 4.0 / obs. 190479116
Fremontodendron californicum, photographed by paulexcoff
fig. e paulexcoff, CC BY-SA 4.0 / obs. 189693508
Fremontodendron californicum, photographed by Trevor Van Loon
fig. f Trevor Van Loon, CC BY 4.0 / obs. 193607442
Fremontodendron californicum, photographed by Tom and T Herman
fig. g Tom and T Herman, CC BY 4.0 / obs. 183070037
Fremontodendron californicum, photographed by Henrik Kibak
fig. h Henrik Kibak, CC BY 4.0 / obs. 181758107

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 = 654 observations

Peak flowering in May, from 654 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 21 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.

  • Cheirostemon californicus (Torr.) Martínez
  • Chiranthodendron californicum (Torr.) Baill.
  • Fremontia californica Torr.
  • Fremontia californica subsp. crassifolia (Eastw.) Abrams
  • Fremontia californica subsp. napensis (Eastw.) Munz
  • Fremontia californica subsp. obispoensis (Eastw.) Munz
  • Fremontia californica var. diegensis M.Harv.
  • Fremontia californica var. integra M.Harv.
  • Fremontia californica var. napensis (Eastw.) McMinn
  • Fremontia californica var. typica M.Harv.
  • Fremontia californica var. viridis M.Harv.
  • Fremontia crassifolia Eastw.
  • Fremontia napaense Eastw.
  • Fremontia napensis Eastw.
  • Fremontia obispoensis Eastw.
  • Fremontodendron californicum subsp. crassifolium (Eastw.) J.H.Thomas
  • Fremontodendron californicum subsp. napense (Eastw.) Munz
  • Fremontodendron californicum subsp. obispoense (Eastw.) Munz
  • Fremontodendron californicum var. obispoense (Eastw.) Hoover
  • Fremontodendron decumbens R.M.Lloyd
  • Fremontodendron napense (Eastw.) R.M.Lloyd

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.