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| July 2008 at Tsukuba Botanical Garden |
June 2008 at Kochi Prefecture Makino Botanical Garden |
June 2008 at Kochi Prefecture Makino Botanical Garden |
| Family | Nymphaeaeceae |
| Scientific name | Nymphaea tetragona Georgi |
| Synonyms | Castalia crassifolia Handel-Mazzetti; Castalia pygmaea Salisbury; Castalia tetragona (Georgi) G. Lawson; Leuconymphaea tetragona (Georgi) Kuntze; Nymphaea acutilboa de Candolle; Nymphaea alba L. subsp. tetragon (Georgi) Korsh; Nymphaea crassifolia (Handel-Mazzetti) Nakai; Nymphaea fennica Mela; Nymphaea jponokoreana Nakai; Nymphaea pygmaea (Salisbury) Aiton; Nymphaea tetragona Georgi subvar. indica Caspary; Nymphaea tetragona Georgi var. angusta Caspary ex Nakai; Nymphaea tetragona Georgi var. crassifolia (Handel-Mazzetti) Y. C. Chu; Nymphaea tetragona Georgi var. himalayense F. Henkel et al.; Nymphaea tetragona Georgi var. indica (Caspary) F. Henkel et al.; Nymphaea tetragona Georgi var. lata Caspary; Nymphaea tetragona Georgi var. wenzelii (Maack) F. Henkel et al.; Nymphaea wenzelii Maack |
| Common name | (Japanese common name) hituji-gusa (ヒツジグサ, 羊草 [meaning: sheep weed]) |
| (English common name) pygmy waterlily | |
| Distribution | (Japan) Hokkaido, Honshu, Shikoku, Kyushu, Okinawa |
| (Other nations) Russia, Korea, China, Taiwan, Mongolia, Vietnam, Myanmar, India, Kazakhstan, Finland, Canada, USA | |
| Habitat | Pond, swamp |
| Chromosomal number | 2n=112 |
| Description | Leaves 10-19cm long. Flowers white petals each 8-15cm long, flowering in June to September. Water plants. Perennial plants. |
| Reference | Nymphaea tetragona Georgi |
| Nymphaea tetragona Georgi | |
| Water purificant (US Patent 6254800/2001) | |
| Water purificant methods (US Patent 6478985/2002) | |
| Note | Rare species. |
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|---|---|---|
| July 2008 at Tsukuba Botanical Garden |
June 2008 at Kochi Prefecture Makino Botanical Garden |
June 2008 at Kochi Prefecture Makino Botanical Garden |
