Ceanothus thyrsiflorusEschsch.

blueblossom

WFO wfo-0000592092 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Ceanothus thyrsiflorus, photographed by Cricket Raspet
fig. a Cricket Raspet, CC BY 4.0 / 2022-05-10 / obs. 196707477
Ceanothus thyrsiflorus, photographed by rappman
fig. b rappman, CC BY 4.0 / obs. 200353174
Ceanothus thyrsiflorus, photographed by paulexcoff
fig. c paulexcoff, CC BY-SA 4.0 / obs. 194820867
Ceanothus thyrsiflorus, photographed by Garth Harwood
fig. d Garth Harwood, CC BY 4.0 / obs. 193993971
Ceanothus thyrsiflorus, photographed by Chuck Wilson
fig. e Chuck Wilson, CC0 1.0 / obs. 191022355
Ceanothus thyrsiflorus, photographed by Adam J. Searcy
fig. f Adam J. Searcy, CC BY 4.0 / obs. 186992554
Ceanothus thyrsiflorus, photographed by Garth Harwood
fig. g Garth Harwood, CC BY 4.0 / obs. 190435143
Ceanothus thyrsiflorus, photographed by Alex
fig. h Alex, CC BY 4.0 / obs. 195747058

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 = 1,620 observations

Peak flowering in Apr, from 1,620 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 5 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.

  • Ceanothus elegans Lem.
  • Ceanothus thyrsiflorus var. chandleri Jeps.
  • Ceanothus thyrsiflorus var. repens McMinn
  • Ceanothus thyrsiflorus var. thyrsiflorus
  • Forrestia thyrsoides Raf.

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.