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Lakes and ponds in central and southern Japan. Swamps and ponds from near sea level to 1,000 metres, occasionally to 2,000 metres in southern China.
Lakes and ponds in central and southern Japan.
| Life form | annual |
| Growth form | herb |
| Growth support | - |
| Foliage retention | - |
| Sexuality | hermaphrodite |
| Pollination | - |
| Spread | - |
| Mature width (meter) | - |
| Mature height (meter) | - |
| Root system | - |
| Rooting depth (meter) | - |
| Root diameter (meter) | - |
| Flower color | - |
| Blooming months | - |
| Fruit color | - |
| Fruiting months | - |
| Nitrogen fixer | - |
| Photosynthetic pathway | - |
| Light |
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| Soil humidity | 
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| Soil texture | 
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| Soil acidity | 
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| Soil nutriment | - |
| Hardiness (USDA) | 
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| Uses | medicinal |
| Edible | fruits seeds |
| Therapeutic use | - |
| Human toxicity | - |
| Animal toxicity | - |
| Mode | seedlings |
| Germination duration (days) | - |
| Germination temperacture (C°) | - |
| Germination luminosity | - |
| Germination treatment | - |
| Minimum temperature (C°) | - |
| Optimum temperature (C°) | - |
| Size | - |
| Vigor | - |
| Productivity | - |
| LSID | urn:lsid:ipni.org:names:614402-1 |
| WFO ID | wfo-0001142843 |
| COL ID | 57XTH |
| BDTFX ID | - |
| INPN ID | - |
| Wikipedia (EN) | |
| Wikipedia (FR) |