Ceratophyllum demersumL.

coontail

WFO wfo-0000831785 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Ceratophyllum demersum, photographed by Марина Садыкова
fig. a Марина Садыкова, CC BY 4.0 / 2022-06-12 / obs. 205692719
Ceratophyllum demersum, photographed by Марина Садыкова
fig. b Марина Садыкова, CC BY 4.0 / obs. 204433479
Ceratophyllum demersum, photographed by Евгений Егорейченков
fig. c Евгений Егорейченков, CC BY 4.0 / obs. 201805825
Ceratophyllum demersum, photographed by Samuel A Schmid, PhD, PWS
fig. d Samuel A Schmid, PhD, PWS, CC BY 4.0 / obs. 203294947
Ceratophyllum demersum, photographed by Марина Садыкова
fig. e Марина Садыкова, CC BY 4.0 / obs. 201324634
Ceratophyllum demersum, photographed by Марина Садыкова
fig. f Марина Садыкова, CC BY 4.0 / obs. 199601632
Ceratophyllum demersum, photographed by Marilynn Miller
fig. g Marilynn Miller, CC BY 4.0 / obs. 200831025
Ceratophyllum demersum, photographed by Марина Садыкова
fig. h Марина Садыкова, CC BY 4.0 / obs. 194689706

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.

Also published as 39 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.

  • Ceratophyllum apiculatum Cham.
  • Ceratophyllum aquaticum H.C.Watson
  • Ceratophyllum asperum Lam.
  • Ceratophyllum chilense Leyb.
  • Ceratophyllum cornutum Rich. ex S.F.Gray
  • Ceratophyllum cornutum Rich.
  • Ceratophyllum demersum f. papillosum Wilmot-Dear
  • Ceratophyllum demersum f. quadrispinum (Makino) Kitag.
  • Ceratophyllum demersum subsp. platyacanthum (Cham.) Nyman
  • Ceratophyllum demersum subvar. tricorne Nyman
  • Ceratophyllum demersum var. commune A.Gray
  • Ceratophyllum demersum var. inflatum R.E.Fr.
  • Ceratophyllum demersum var. missionis (Wall. ex Wight & Arn.) S.K.Srivast.
  • Ceratophyllum demersum var. notacanthum Foucaud
  • Ceratophyllum demersum var. oxyacanthum (Cham.) K.Schum.
  • Ceratophyllum demersum var. pentacanthum (Haynald) K.Schum.
  • Ceratophyllum demersum var. pentacorne Kitag.
  • Ceratophyllum demersum var. tricorne Van Haes.
  • Ceratophyllum gibbum Laforet ex Nyman
  • Ceratophyllum indicum Willd. ex Cham.
  • Ceratophyllum komarovii Kuzen.
  • Ceratophyllum missionis Wall.
  • Ceratophyllum missionis Wall. ex Wight & Arn.
  • Ceratophyllum oryzetorum Kom.

and 15 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.