Pontederia crassipesMart.

common water hyacinth

WFO wfo-0000501039 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Pontederia crassipes, photographed by Tom Riggle
fig. a Tom Riggle, CC BY-SA 4.0 / 2022-06-03 / obs. 203373295
Pontederia crassipes, photographed by Joseph Aubert
fig. b Joseph Aubert, CC BY 4.0 / obs. 201312298
Pontederia crassipes, photographed by Joseph Aubert
fig. c Joseph Aubert, CC BY 4.0 / obs. 201248759
Pontederia crassipes, photographed by Joseph Aubert
fig. d Joseph Aubert, CC BY 4.0 / obs. 199831254
Pontederia crassipes, photographed by Joseph Aubert
fig. e Joseph Aubert, CC BY 4.0 / obs. 200915781
Pontederia crassipes, photographed by Joseph Aubert
fig. f Joseph Aubert, CC BY 4.0 / obs. 199830780
Pontederia crassipes, photographed by Joseph Aubert
fig. g Joseph Aubert, CC BY 4.0 / obs. 201264113
Pontederia crassipes, photographed by Elizabete Marchante
fig. h Elizabete Marchante, CC BY 4.0 / obs. 199603924

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.

Confused withby our own model

These are not lookalikes we guessed at. Each one is a species our identification model genuinely mistook for this plant, and how many times. The error rate is published.

Also published as 14 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.

  • Eichhornia cordifolia Gand.
  • Eichhornia crassicaulis Schltr.
  • Eichhornia crassicaulis Schlecht.
  • Eichhornia crassipes (Mart.) Solms
  • Eichhornia speciosa Kunth
  • Heteranthera formosa Miq.
  • Oshuna crassipes (Mart.) A.Haines
  • Piaropus crassipes (Mart.) Raf.
  • Piaropus crassipes (Mart.) A.Haines
  • Piaropus mesomelas Raf.
  • Pontederia crassicaulis Schltr.
  • Pontederia crassicaulis Schlecht.
  • Pontederia crassipes Roem. & Schult.
  • Pontederia elongata Balf.

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.