Elatine hydropiperL.

eight-stamened waterwortwaterwort

WFO wfo-0000665333 Accepted WFO 2026-06 6 photographs CC BY / CC BY-SA

Plate 1 figs. a–f · 6 separate observations

Elatine hydropiper, photographed by Grzegorz Grzejszczak
fig. a Grzegorz Grzejszczak, CC BY-SA 4.0 / 2019-09-22 / obs. 53260984
Elatine hydropiper, photographed by Grzegorz Grzejszczak
fig. b Grzegorz Grzejszczak, CC BY-SA 4.0 / obs. 45737805
Elatine hydropiper, photographed by Andre Hosper
fig. c Andre Hosper, CC BY 4.0 / obs. 49994183
Elatine hydropiper, photographed by Andre Hosper
fig. d Andre Hosper, CC BY 4.0 / obs. 49994164
Elatine hydropiper, photographed by Andre Hosper
fig. e Andre Hosper, CC BY 4.0 / obs. 49994120
Elatine hydropiper, photographed by Andre Hosper
fig. f Andre Hosper, CC BY 4.0 / obs. 49994235

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 37 botanical countries

Regions where Elatine hydropiper is native: Altay, Amur, Buryatiya, Chita, Irkutsk, Kamchatka, Krasnoyarsk, Manchuria, Primorye, Transcaucasus, West Siberia, Austria, Baltic States, Belarus, Belgium, Bulgaria, Central European Russia, Czechia-Slovakia, Denmark, East European Russia, Finland, France, Germany, Great Britain, Hungary, Ireland, Italy, Netherlands, Northwest European Russia, Norway, Poland, Romania, South European Russia, Spain, Sweden, Switzerland, Ukraine AltayAmurBuryatiyaChitaIrkutskKamchatkaKrasnoyarskManchuriaPrimoryeTranscaucasusWest SiberiaAustriaBaltic StatesBelarusBelgiumBulgariaCentral European RussiaCzechia-SlovakiaDenmarkEast European RussiaFinlandFranceGermanyHungaryIrelandItalyNetherlandsNorthwest European RussiaNorwayPolandRomaniaSouth European RussiaSpainSwedenSwitzerlandUkraine
Native distribution of Elatine hydropiper, 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
Austria AUT EUROPE
Baltic States BLT
Belarus BLR
Belgium BGM
Bulgaria BUL
Central European Russia RUC
Czechia-Slovakia CZE
Denmark DEN
East European Russia RUE
Finland FIN
France FRA
Germany GER
Great Britain GRB
Hungary HUN
Ireland IRE
Italy ITA
Netherlands NET
Northwest European Russia RUW
Norway NOR
Poland POL
Romania ROM
South European Russia RUS
Spain SPA
Sweden SWE
Switzerland SWI
Ukraine UKR
Altay ALT ASIA-TEMPERATE
Amur AMU
Buryatiya BRY
Chita CTA
Irkutsk IRK
Kamchatka KAM
Krasnoyarsk KRA
Manchuria CHM
Primorye PRM
Transcaucasus TCS
West Siberia WSB

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 37 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.

  • Alsinastrum gyrospermum (Fr.) Rupr.
  • Alsinastrum octandrum Bubani
  • Alsine elatina Crantz
  • Elatine conjugata Lam.
  • Elatine gyrosperma (Fr.) Meinsh.
  • Elatine gyrosperma E.H.L.Krause
  • Elatine hardyana Dumort.
  • Elatine hexandra prol. major (A.Braun) Rouy & Foucaud
  • Elatine hexandra subsp. major (A.Braun) Arcang.
  • Elatine hydropiper Schkuhr
  • Elatine hydropiper f. intermedia Seub.
  • Elatine hydropiper f. submersa (Hartm.) Seub.
  • Elatine hydropiper f. terrestris Seub.
  • Elatine hydropiper prol. major (A.Braun) Rouy & Foucaud
  • Elatine hydropiper subsp. gyrosperma Fr.
  • Elatine hydropiper subsp. orthosperma F.Herm.
  • Elatine hydropiper var. emersa Hartm.
  • Elatine hydropiper var. gyrosperma (Fr.) Lange
  • Elatine hydropiper var. schkuhriana Gaudin
  • Elatine hydropiper var. submersa Hartm.
  • Elatine major A.Braun
  • Elatine majuscula Dumort.
  • Elatine nodosa Arn.
  • Elatine oederi Moesz

and 13 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.
  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.