Rotala indica(Willd.) Koehne

Indian toothcup

WFO wfo-0000405905 Accepted WFO 2026-06 3 photographs CC0

Plate 1 figs. a–c · 1 observation

This species has been photographed under an open licence only 1 time, so some figures below are different views of the same plant, taken on the same day, rather than different individuals. They are usually different parts of it: the leaf, the flower, the bark.

Rotala indica, photographed by 葉子
fig. a 葉子, CC0 1.0 / 2021-01-19 / obs. 111276828
Rotala indica, photographed by 葉子
fig. b 葉子, CC0 1.0 / obs. 111276829
Rotala indica, photographed by 葉子
fig. c 葉子, CC0 1.0 / obs. 111276827

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 30 botanical countries

Regions where Rotala indica is native: Afghanistan, China North-Central, China South-Central, China Southeast, Iran, Japan, Korea, Nansei-shoto, Tadzhikistan, Taiwan, Uzbekistan, Assam, Bangladesh, Cambodia, East Himalaya, India, Jawa, Laos, Lesser Sunda Is., Malaya, Myanmar, Nepal, Pakistan, Philippines, Sri Lanka, Sulawesi, Sumatera, Thailand, Vietnam, West Himalaya AfghanistanChina North-CentralChina South-CentralChina SoutheastIranJapanTadzhikistanTaiwanUzbekistanAssamBangladeshCambodiaEast HimalayaIndiaJawaLaosLesser Sunda Is.MalayaMyanmarNepalPakistanPhilippinesSri LankaSulawesiSumateraThailandVietnamWest Himalaya KoreaNansei-shoto
Native distribution of Rotala indica, 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. Regions too small to draw at this scale are marked with a dot.
RegionTDWG codeContinent
Assam ASS ASIA-TROPICAL
Bangladesh BAN
Cambodia CBD
East Himalaya EHM
India IND
Jawa JAW
Laos LAO
Lesser Sunda Is. LSI
Malaya MLY
Myanmar MYA
Nepal NEP
Pakistan PAK
Philippines PHI
Sri Lanka SRL
Sulawesi SUL
Sumatera SUM
Thailand THA
Vietnam VIE
West Himalaya WHM
Afghanistan AFG ASIA-TEMPERATE
China North-Central CHN
China South-Central CHC
China Southeast CHS
Iran IRN
Japan JAP
Korea KOR
Nansei-shoto NNS
Tadzhikistan TZK
Taiwan TAI
Uzbekistan UZB

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 20 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.

  • Ameletia acutidens Miq.
  • Ameletia elongata Blume
  • Ameletia indica (Willd.) DC.
  • Ameletia uliginosa Miq.
  • Ammannia acutidens Miq.
  • Ammannia elongata Blume
  • Ammannia indica (Willd.) Druce
  • Ammannia nana Roxb.
  • Ammannia peploides Spreng.
  • Ammannia polystachya Wall. ex Wight & Arn.
  • Ammannia polystachya Wall.
  • Ammannia ramosior Blanco
  • Ammannia repens Rottler ex Mart.
  • Peplis indica Willd.
  • Rotala densiflora var. formosana Hayata
  • Rotala elatinomorpha Makino
  • Rotala indica var. koreana Nakai
  • Rotala indica var. uliginosa (Miq.) Koehne
  • Rotala koreana (Nakai) Nakai
  • Rotala uliginosa (Miq.) Nakai

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.