Aconitum columbianumNutt.

Columbian Monkshood

WFO wfo-0000517097 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Aconitum columbianum, photographed by Diego Blanco
fig. a Diego Blanco, CC0 1.0 / 2021-08-11 / obs. 154790924
Aconitum columbianum, photographed by Diego Blanco
fig. b Diego Blanco, CC0 1.0 / obs. 154790970
Aconitum columbianum, photographed by rappman
fig. c rappman, CC BY 4.0 / obs. 148869269
Aconitum columbianum, photographed by Diego Blanco
fig. d Diego Blanco, CC0 1.0 / obs. 148692714
Aconitum columbianum, photographed by Leanne Stacy Reitan
fig. e Leanne Stacy Reitan, CC0 1.0 / obs. 147413574
Aconitum columbianum, photographed by Reid Hardin
fig. f Reid Hardin, CC BY 4.0 / obs. 144561466
Aconitum columbianum, photographed by Drew Meyer
fig. g Drew Meyer, CC0 1.0 / obs. 144260865
Aconitum columbianum, photographed by joergmlpts
fig. h joergmlpts, CC BY 4.0 / obs. 143475151

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 = 1,026 observations

Peak flowering in Jul, from 1,026 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 34 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.

  • Aconitum arizonicum Greene
  • Aconitum bakeri Greene
  • Aconitum bulbiferum Howell
  • Aconitum columbianum f. ochroleucum (A.Nelson) H.St.John
  • Aconitum columbianum subsp. columbianum
  • Aconitum columbianum subsp. pallidum Piper
  • Aconitum columbianum subsp. viviparum (Greene) Brink
  • Aconitum columbianum var. bakeri (Greene) H.D.Harr.
  • Aconitum columbianum var. bakeri (Greene) Harr.
  • Aconitum columbianum var. columbianum
  • Aconitum columbianum var. glaberrimum (Rydb.) Kearney & Peebles
  • Aconitum columbianum var. lutescens (A.Nelson) M.E.Jones
  • Aconitum delphinifolium var. ramosum K.C.Davis
  • Aconitum geranioides Greene
  • Aconitum glaberrimum Rydb.
  • Aconitum hansenii Greene
  • Aconitum howellii A.Nelson & J.F.Macbr.
  • Aconitum leibergii Greene
  • Aconitum lutescens A.Nelson
  • Aconitum macilentum Greene
  • Aconitum mogollonicum Greene
  • Aconitum nivatum A.Nelson
  • Aconitum obtusiflorum Greene
  • Aconitum ochroleucum Rydb.

and 10 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.