Castilleja tenuifloraBenth.

Santa Catalina Paintbrush

WFO wfo-0000590579 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Castilleja tenuiflora, photographed by Scott Yarger
fig. a Scott Yarger, CC0 1.0 / 2022-02-23 / obs. 181993331
Castilleja tenuiflora, photographed by Oscar Alejandro Morales Juárez
fig. b Oscar Alejandro Morales Juárez, CC BY-SA 4.0 / obs. 147857101
Castilleja tenuiflora, photographed by José Gerardo Velasco
fig. c José Gerardo Velasco, CC BY-SA 4.0 / obs. 137070452
Castilleja tenuiflora, photographed by Oscar Alejandro Morales Juárez
fig. d Oscar Alejandro Morales Juárez, CC BY-SA 4.0 / obs. 147851793
Castilleja tenuiflora, photographed by José Gerardo Velasco
fig. e José Gerardo Velasco, CC BY-SA 4.0 / obs. 137079939
Castilleja tenuiflora, photographed by Juan Rafael Rodríguez Razgado
fig. f Juan Rafael Rodríguez Razgado, CC BY 4.0 / obs. 105966143
Castilleja tenuiflora, photographed by Alexis López Hernández
fig. g Alexis López Hernández, CC BY 4.0 / obs. 87346590
Castilleja tenuiflora, photographed by Andrew Tree
fig. h Andrew Tree, CC BY 4.0 / obs. 122565971

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 = 2,358 observations

Peak flowering in Oct, from 2,358 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 9 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 anthemidifolia Benth.
  • Castilleja canescens Benth.
  • Castilleja integrifolia Kunth
  • Castilleja laxa A.Gray
  • Castilleja retrorsa Standl.
  • Castilleja scabridula Eastw.
  • Castilleja setosa Pennell
  • Castilleja tancitaroana G.L.Nesom
  • Castilleja xylorrhiza Eastw.

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.