Comandra umbellata(L.) Nutt.

bastard toadflax

WFO wfo-0000615918 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Comandra umbellata, photographed by Carol Ann Vermeer
fig. a Carol Ann Vermeer, CC BY 4.0 / 2022-06-11 / obs. 205438368
Comandra umbellata, photographed by Alec McClay
fig. b Alec McClay, CC BY 4.0 / obs. 205247076
Comandra umbellata, photographed by Mary Krieger
fig. c Mary Krieger, CC BY 4.0 / obs. 205025319
Comandra umbellata, photographed by Braden J. Judson
fig. d Braden J. Judson, CC0 1.0 / obs. 205923431
Comandra umbellata, photographed by Mary Krieger
fig. e Mary Krieger, CC BY 4.0 / obs. 205038148
Comandra umbellata, photographed by Mary Krieger
fig. f Mary Krieger, CC BY 4.0 / obs. 204544874
Comandra umbellata, photographed by Braden J. Judson
fig. g Braden J. Judson, CC0 1.0 / obs. 205920489
Comandra umbellata, photographed by Eric Lamb
fig. h Eric Lamb, CC BY 4.0 / obs. 203730369

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 = 1,826 observations

Peak flowering in May, from 1,826 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 26 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.

  • Comandra californica Eastw. ex Rydb.
  • Comandra cuneifolia Raf.
  • Comandra elegans Rchb.f.
  • Comandra elliptica Raf.
  • Comandra linearis Rydb.
  • Comandra media Raf.
  • Comandra nudiflora Davidson
  • Comandra obovata Raf.
  • Comandra obtusifolia Raf.
  • Comandra pallida A.DC.
  • Comandra pallida var. angustifolia A.DC.
  • Comandra richardsiana Fernald
  • Comandra umbellata subsp. richardsiana (Fernald) Á.Löve & D.Löve
  • Comandra umbellata subsp. umbellata
  • Comandra umbellata var. angustifolia (A.DC.) Torr.
  • Comandra umbellata var. californica (Eastw. ex Rydb.) C.L.Hitchc.
  • Comandra umbellata var. decumbens E.J.Hill
  • Comandra umbellata var. lanceolata Nutt.
  • Comandra umbellata var. pallida M.E.Jones
  • Comandra umbellata var. umbellata
  • Comandra umbellulata Raf.
  • Hamiltonia elegans Rchb.f.
  • Hamiltonia umbellata Spreng.
  • Thesium corymbosulum Michx.

and 2 more.

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.