Mentzelia laevicaulis(Douglas ex Hook.) Torr. & A.Gray

Giant Blazingstar

WFO wfo-0001073680 Accepted WFO 2026-06 7 photographs CC0 / CC BY

Plate 1 figs. a–g

Mentzelia laevicaulis, photographed by velodrome
fig. a velodrome, CC BY 4.0 / 2021-11-20 / obs. 169757005
Mentzelia laevicaulis, photographed by Victor Heng
fig. b Victor Heng, CC BY 4.0 / obs. 164444480
Mentzelia laevicaulis, photographed by Daryl Nolan
fig. c Daryl Nolan, CC0 1.0 / obs. 168238316
Mentzelia laevicaulis, photographed by Daniel S.
fig. d Daniel S., CC BY 4.0 / obs. 162389880
Mentzelia laevicaulis, photographed by Steve Woodward
fig. e Steve Woodward, CC0 1.0 / obs. 152574209
Mentzelia laevicaulis, photographed by Dennis Eckhart
fig. f Dennis Eckhart, CC BY 4.0 / obs. 155701651
Mentzelia laevicaulis, photographed by Mitch Van Dyke
fig. g Mitch Van Dyke, CC BY 4.0 / obs. 141376360

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 = 897 observations

Peak flowering in Jul, from 897 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 15 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.

  • Bartonia laevicaulis Douglas ex Hook.
  • Bartonia parviflora Douglas ex Hook.
  • Hesperaster laevicaulis Cockerell
  • Mentzelia acuminata (Rydb.) Tidestr.
  • Mentzelia brandegeei S.Watson
  • Mentzelia douglasii H.St.John
  • Mentzelia laevicaulis var. acuminata (Rydb.) A.Nelson & J.F.Macbr.
  • Mentzelia parviflora (Douglas ex Hook.) J.F.Macbr.
  • Nuttallia acuminata Rydb.
  • Nuttallia brandegeei (S.Watson) Greene
  • Nuttallia laevicaulis (Douglas ex Hook.) Greene
  • Nuttallia parviflora (Douglas ex Hook.) Greene
  • Touterea brandegeei (S.Watson) Rydb.
  • Touterea laevicaulis (Douglas ex Hook.) Rydb.
  • Touterea parviflora (Douglas ex Hook.) Rydb.

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.