Thesium humifusumDC.

bastard toadflax

WFO wfo-0000454690 Accepted WFO 2026-06 8 photographs CC0

Plate 1 figs. a–h · 8 separate observations

Thesium humifusum, photographed by Robert H. Wardell
fig. a Robert H. Wardell, CC0 1.0 / 2020-10-05 / obs. 99079567
Thesium humifusum, photographed by Robert H. Wardell
fig. b Robert H. Wardell, CC0 1.0 / obs. 99079639
Thesium humifusum, photographed by Robert H. Wardell
fig. c Robert H. Wardell, CC0 1.0 / obs. 99079659
Thesium humifusum, photographed by Robert H. Wardell
fig. d Robert H. Wardell, CC0 1.0 / obs. 94737946
Thesium humifusum, photographed by Robert H. Wardell
fig. e Robert H. Wardell, CC0 1.0 / obs. 94738670
Thesium humifusum, photographed by Robert H. Wardell
fig. f Robert H. Wardell, CC0 1.0 / obs. 90742171
Thesium humifusum, photographed by Robert H. Wardell
fig. g Robert H. Wardell, CC0 1.0 / obs. 90742142
Thesium humifusum, photographed by Robert H. Wardell
fig. h Robert H. Wardell, CC0 1.0 / obs. 90742153

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.

Native range 5 botanical countries

Regions where Thesium humifusum is native: Belgium, France, Great Britain, Netherlands, Spain BelgiumFranceNetherlandsSpain
Native distribution of Thesium humifusum, after Kew’s World Checklist of Vascular Plants. Introduced, extinct and doubtful records are excluded, so this is where the plant is from, not everywhere it now grows.
RegionTDWG codeContinent
Belgium BGM EUROPE
France FRA
Great Britain GRB
Netherlands NET
Spain SPA

Not drawn on the map: Great Britain. We hold no public-domain boundary for this region, so it is listed rather than guessed at.

Region boundaries approximated from Natural Earth (public domain) and mapped to TDWG World Geographical Scheme for Recording Plant Distributions (WGSRPD) level-3 botanical countries (Brummitt 2001). Indicative, not the official WGSRPD geometry.

Also published as 4 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.

  • Linophyllum humifusum Bubani
  • Linosyris humifusa Kuntze
  • Thesium eifaliense Steud.
  • Thesium hussenotii Hussen.

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.
  3. Wikidata. common name (P1843), joined on the World Flora Online identifier (P7715). CC0. Retrieved 2026-07-13.
  4. Kew, World Checklist of Vascular Plants (WCVP v16). native distribution by TDWG level-3 botanical country, and life form. CC BY 3.0. Retrieved 2026-06-04.

We publish what we can source and we say so when we cannot. This page has no care advice and no toxicity claim, because we do not yet have those from a source we can cite.