Castilleja exserta(A.Heller) T.I.Chuang & Heckard

purple owl's-clover

WFO wfo-0000590183 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Castilleja exserta, photographed by George Williams
fig. a George Williams, CC BY 4.0 / 2022-05-10 / obs. 196666065
Castilleja exserta, photographed by Leah Gardner
fig. b Leah Gardner, CC0 1.0 / obs. 199012644
Castilleja exserta, photographed by Chuck Wilson
fig. c Chuck Wilson, CC0 1.0 / obs. 198215222
Castilleja exserta, photographed by Miguel Vieira
fig. d Miguel Vieira, CC BY 4.0 / obs. 196101900
Castilleja exserta, photographed by Henrik Kibak
fig. e Henrik Kibak, CC BY 4.0 / obs. 195828999
Castilleja exserta, photographed by James C. Davis
fig. f James C. Davis, CC BY-SA 4.0 / obs. 194509455
Castilleja exserta, photographed by Henrik Kibak
fig. g Henrik Kibak, CC BY 4.0 / obs. 195239122
Castilleja exserta, photographed by Henrik Kibak
fig. h Henrik Kibak, CC BY 4.0 / obs. 200576333

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 = 3,908 observations

Peak flowering in Apr, from 3,908 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 11 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.

  • Castilleja exserta subsp. latifolia (S.Watson) T.I.Chuang & Heckard
  • Castilleja exserta subsp. venusta (A.Heller) T.I.Chuang & Heckard
  • Orthocarpus exsertus A.Heller
  • Orthocarpus purpurascens Benth.
  • Orthocarpus purpurascens var. latifolius S.Watson
  • Orthocarpus purpurascens var. multicaulis Jeps.
  • Orthocarpus purpurascens var. pallidus D.D.Keck
  • Orthocarpus purpurascens var. palmeri A.Gray
  • Orthocarpus purpurascens var. typicus D.D.Keck
  • Orthocarpus purpurascens var. venustus (A.Heller) D.D.Keck
  • Orthocarpus venustus A.Heller

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.