Water caltrop
सिंघाड़ाகுரலிകാക്കമുള്ള്
Trapa natans L.
- light
- Full sun
- water
- Plenty
- tall
- —
- wide
- 51 cm
Lythraceae
Also called Water-caltrop, European water chestnut, Water nut, Water chestnut, Jesuit's nut
When it flowers
Not known yet in the tropics: too few flowering observations to read a season from.
Read from iNaturalist photographs of it in flower. A month counts at 50% of the best month's flowering share (smoothed over three months) and 10% of its flowering count, from at least 100 flowering observations in the band.
If a child, a pet or anyone may have eaten a plant, contact a doctor or vet straight away, or call the National Poisons Information Centre (AIIMS, New Delhi) on 1800 116 117, free and open 24 hours.
Something wrong with it?About it
- Grows as
- HydroannualKew's checklist, not yet checked
- Climate
- TemperateKew's checklist, not yet checked
- Wild in
- Old WorldKew's checklist, not yet checked
- Light
- Full sun (6 h or more)Read from Wikipedia, one source
- Spread
- 51 cmRead from Wikipedia, one source
- Water
- Plenty: wet or constantly moistRead from Wikipedia, one source
- Flowers
- White, pinkRead from Wikipedia, one source
Not known yet: height, coldest it survives, heat, hottest it survives.
In other languages (12)
- root
- TRANAT, eKota
- German
- Wassernuss, Wasserkastanie, Gewöhnliche Wassernuss
- Italian
- Castagna d'acqua, Tribolo acquatico
- French
- Mâcre nageante, Châtaigne d'eau, Châtaigne d'Eau
- Czech
- kotvice plovoucí
- Chinese
- 菱角, 四角野菱, 欧菱 (红菱、乌菱）
- Russian
- Рогульник плавающий, Чилим, орех водяной
- Danish
- Hornnød
- Lithuanian
- Plūduriuojantysis agaras
- Korean
- 네마름
- Polish
- Kotewka orzech wodny
- Japanese
- オニビシ (広義), メビシ (広義), ヒシ
Where this comes from
- iNaturalist, read 2026-10-25, CC0-1.0 (observation counts)
- Wikidata, read 2026-10-26, CC0-1.0
- Kew's checklist, read 2026-10-24, CC-BY-4.0
- Wikipedia, read 2026-10-25, fact, cited
- Wikimedia Commons, read 2026-10-25, CC BY 3.0
- iNaturalist, read 2026-10-25, CC BY-SA
- iNaturalist, read 2026-10-25, CC BY
- iNaturalist, read 2026-10-25, CC BY
- 3D model: Trapa natans (built for Vanagrha) by Vanagrha, own
A fact “checked by a majority of its sources” was settled by a vote of the pages it was read from, not by a person reading it; one marked “one source” rests on that page alone. Anything else not marked checked has not been checked yet. Where nothing is known, the page says so rather than guess.