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| September 2008 at Ohsaka City University Botanical Garden |
September 2008 at Ohsaka City University Botanical Garden |
September 2008 at Ohsaka City University Botanical Garden |
| Family | Lythraceae (also placed in Trapaceae and Onagraceae) |
| Scientific name | Trapa natans L. var. quadrispinosa (Roxburgh) Makino |
| Synonyms | Trapa gracilipes Sugimoto; Trapa japonica Flerow var. rubeola (Makino) Ohwi; Trapa natans auct., non L.; Trapa natans L. forma quadrispinosa (Roxburgh) Makino; Trapa natans L. var. japonica Nakai; Trapa natans L. var. rubeola Makino; Trapa natans L. var. rubeola Makino forma viridis Sugimoto; Trapa quadrispinosa Roxburgh, non Franchet & Savatier |
| Common name | (Japanese common name) oni-bishi (オニビシ, 鬼菱 [meaning: tiger hishi (hishi = Trapa japonica Flerow)]) |
| (English common name) none | |
| Distribution | (Japan) Hokkaido, Honshu, Shikoku, Kyushu |
| (Other nations) none | |
| Habitat | Pond, swamp |
| Chromosomal number | 2n=48 |
| Description | Leaves 3-6cm across. Flowers white ca. 1cm across, flowering in July to October. Fruits ca. 3-5cm wide, 4 spikes. Annual plants. |
| Reference | Trapa natans var. quadrispinosa |
| Trapa natans L. | |
| Trapa natans Linnaeus | |
| Karyomorphology of Some Trapaceae in Japan | |
| Cosmetic (US Patent 5538731/1996) | |
| Composition having physiological activity and production method thereof (US Patent 6953580/2005) | |
| Method for detecting proteins under mutual interaction (US Patent 7122382/2006) | |
| Note | Endemic to Japan. |
| Fruits of Trapa natans var. quadrispinosa (2n=48) has 4 spikes; fruits of Trapa japonica Flerow (2n=96) has 2 spikes. | |
| Flora of China has described that Trapa natans L. var. quadrispinosa (Roxburgh) Makino is a synonym of Trapa natans L. (var. natans). |
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|---|---|---|
| September 2008 at Ohsaka City University Botanical Garden |
September 2008 at Ohsaka City University Botanical Garden |
September 2008 at Ohsaka City University Botanical Garden |
