Ceanothus cordulatusKellogg

mountain whitethorn

WFO wfo-0000591804 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Ceanothus cordulatus, photographed by Andy Kleinhesselink
fig. a Andy Kleinhesselink, CC0 1.0 / 2022-05-28 / obs. 201612923
Ceanothus cordulatus, photographed by Dominic Gentilcore
fig. b Dominic Gentilcore, CC BY 4.0 / obs. 205304734
Ceanothus cordulatus, photographed by Drew Meyer
fig. c Drew Meyer, CC0 1.0 / obs. 205176150
Ceanothus cordulatus, photographed by Alexander Wentworth
fig. d Alexander Wentworth, CC BY 4.0 / obs. 155044367
Ceanothus cordulatus, photographed by Zoltán Stekkelpak
fig. e Zoltán Stekkelpak, CC0 1.0 / obs. 165179245
Ceanothus cordulatus, photographed by Tim Messick
fig. f Tim Messick, CC BY 4.0 / obs. 144238170
Ceanothus cordulatus, photographed by stinger
fig. g stinger, CC BY 4.0 / obs. 148097249
Ceanothus cordulatus, photographed by Zac Peterson
fig. h Zac Peterson, CC BY 4.0 / obs. 153669970

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 = 383 observations

Peak flowering in Jun, from 383 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.

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.