Thunbergia alataBojer ex Sims

Black-eyed Susan vine

WFO wfo-0000410251 Accepted WFO 2026-06 6 photographs CC0 / CC BY

Plate 1 figs. a–f

Thunbergia alata, photographed by Greg Tasney
fig. a Greg Tasney, CC BY-SA 4.0 / 2022-05-31 / obs. 202367946
Thunbergia alata, photographed by Tony Rebelo
fig. b Tony Rebelo, CC BY-SA 4.0 / obs. 204665359
Thunbergia alata, photographed by ajott
fig. c ajott, CC BY 4.0 / obs. 201348341
Thunbergia alata, photographed by Tony Rebelo
fig. d Tony Rebelo, CC BY-SA 4.0 / obs. 204465614
Thunbergia alata, photographed by Justin Ponder
fig. e Justin Ponder, CC BY 4.0 / obs. 193829500
Thunbergia alata, photographed by Nick Schaller
fig. f Nick Schaller, CC BY 4.0 / obs. 195864120

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 = 2,474 observations

Peak flowering in Apr, from 2,474 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 22 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.

  • Endomelas alata (Bojer ex Sims) Raf.
  • Thunbergia alata var. alba Paxton
  • Thunbergia alata var. albiflora Hook.
  • Thunbergia alata var. minor S.Moore
  • Thunbergia alata var. retinervia Burkill
  • Thunbergia alata var. velutina Bremek.
  • Thunbergia alata var. vixalata Burkill
  • Thunbergia albiflora Gordon
  • Thunbergia aurantiaca Paxton
  • Thunbergia backeri E.Vilm.
  • Thunbergia bakeri Bosse
  • Thunbergia bikimaensis De Wild.
  • Thunbergia delamerei S.Moore
  • Thunbergia doddsii Paxton
  • Thunbergia fryeri E.Vilm.
  • Thunbergia fuscata T.Anderson ex Lindau
  • Thunbergia kamatembica Mildbr.
  • Thunbergia leucantha Van Houtte
  • Thunbergia manganjensis Lindau
  • Thunbergia nymphaeifolia Lindau
  • Thunbergia oculata S.Moore
  • Valentiana volubilis Raf.

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.