Hibiscus trionumL.

flower-of-an-hour

WFO wfo-0000723167 Accepted WFO 2026-06 7 photographs CC0 / CC BY

Plate 1 figs. a–g

Hibiscus trionum, photographed by Jon Sullivan
fig. a Jon Sullivan, CC BY 4.0 / 2022-04-30 / obs. 195561192
Hibiscus trionum, photographed by Thomas Koffel
fig. b Thomas Koffel, CC BY 4.0 / obs. 204295847
Hibiscus trionum, photographed by Justin Ponder
fig. c Justin Ponder, CC BY 4.0 / obs. 192460820
Hibiscus trionum, photographed by Nicola van Berkel
fig. d Nicola van Berkel, CC BY-SA 4.0 / obs. 194242617
Hibiscus trionum, photographed by Shaun Swanepoel
fig. e Shaun Swanepoel, CC BY 4.0 / obs. 185175909
Hibiscus trionum, photographed by Grey Smith
fig. f Grey Smith, CC BY 4.0 / obs. 177856891
Hibiscus trionum, photographed by Haneef Tayob
fig. g Haneef Tayob, CC BY 4.0 / obs. 181288320

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 = 1,284 observations

Peak flowering in Sep, from 1,284 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 28 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.

  • Abelmoschus collinsianus Wood
  • Hibiscus africanus Mill.
  • Hibiscus armeniacus Bouché
  • Hibiscus collinsianus Nutt. ex Torr. & A.Gray
  • Hibiscus cuneifolius Garcke
  • Hibiscus dissectus Wall.
  • Hibiscus hastifolius E.Mey. ex Harv. & Sond.
  • Hibiscus hispidus Mill.
  • Hibiscus humboldtii Schrank ex Colla
  • Hibiscus humboldtii hort. ex Fisch. & C.A.Mey.
  • Hibiscus marchallianus hort. ex Fisch. & Mey
  • Hibiscus pallidus Raf. ex S.Watson
  • Hibiscus physodes E.Mey. ex Harv. & Sond.
  • Hibiscus ternatus Cav.
  • Hibiscus trionicus St.-Lag.
  • Hibiscus trionum var. cordifolius DC.
  • Hibiscus trionum var. ternatus DC.
  • Hibiscus trionum var. vesicarius (Cav.) Hochr.
  • Hibiscus trionum var. vesicarius (Cav.) Hochr.
  • Hibiscus uniflorus E.Mey. ex Harv. & Sond.
  • Hibiscus vesicarius Cav.
  • Ketmia trionum (L.) Scop.
  • Laguna ternata Willd.
  • Trionum annuum Medik.

and 4 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.