Jacobaea vulgarisGaertn.

ragwort

WFO wfo-0000031875 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Jacobaea vulgaris, photographed by David Lazarus
fig. a David Lazarus, CC0 1.0 / 2022-06-11 / obs. 205158160
Jacobaea vulgaris, photographed by Anastasia_Surkova
fig. b Anastasia_Surkova, CC BY 4.0 / obs. 204189065
Jacobaea vulgaris, photographed by Jason Grant
fig. c Jason Grant, CC BY 4.0 / obs. 203585291
Jacobaea vulgaris, photographed by David Sankey
fig. d David Sankey, CC0 1.0 / obs. 203159112
Jacobaea vulgaris, photographed by Yann Kemper
fig. e Yann Kemper, CC0 1.0 / obs. 203012422
Jacobaea vulgaris, photographed by Anastasia_Surkova
fig. f Anastasia_Surkova, CC BY 4.0 / obs. 203669333
Jacobaea vulgaris, photographed by Stephen James McWilliam
fig. g Stephen James McWilliam, CC0 1.0 / obs. 202453191
Jacobaea vulgaris, photographed by Pavel Kacl
fig. h Pavel Kacl, CC BY 4.0 / obs. 202113511

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 = 4,455 observations

Peak flowering in Jul, from 4,455 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 13 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.

  • Jacobaea vulgaris var. vulgaris
  • Senecio dunensis Dumort.
  • Senecio erucaefolius Ledeb.
  • Senecio flosculosus Jord.
  • Senecio foliosus Salzm. ex DC.
  • Senecio jacobaea L.
  • Senecio jacobaea subsp. dunensis (Dumort.) Kadereit & P.D.Sell
  • Senecio jacobaea subsp. jacobaea
  • Senecio jacobaea subsp. nudus (Weston) Soják
  • Senecio jacobaea var. jacobaea
  • Senecio jacobaeoides Willk.
  • Senecio nemorosus Jord.
  • Senecio praealtus subsp. foliosus (DC.) Cout.

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.