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Stems creeping; submersed lvs none; floating lvs long-petioled, shallowly 3–5-lobed; fls white, 5–7 mm wide; receptacle glabrous; 2n=16. Shallow water and wet shores; coastal plain from se. Pa. to S.C.; also Nf. and Europe. May–Aug.
| Life form | perennial | ||||||||||||
| Growth form | herb | ||||||||||||
| Growth support | aquatic | ||||||||||||
| Foliage retention | deciduous | ||||||||||||
| Sexuality | hermaphrodite | ||||||||||||
| Pollination | autogamy | ||||||||||||
| Spread | hydrochory | ||||||||||||
| Mature width (meter) | - | ||||||||||||
| Mature height (meter) | 0.1 - 0.35 | ||||||||||||
| Root system | - | ||||||||||||
| Rooting depth (meter) | - | ||||||||||||
| Root diameter (meter) | - | ||||||||||||
| Flower color | |||||||||||||
| Blooming months |
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| Fruit color | - | ||||||||||||
| Fruiting months | - | ||||||||||||
| Nitrogen fixer | - | ||||||||||||
| Photosynthetic pathway | c3 |
| 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 | 
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| Hardiness (USDA) | 
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| Uses | medicinal |
| Edible | - |
| Therapeutic use | - |
| Human toxicity | - |
| Animal toxicity | - |
| Mode | - |
| Germination duration (days) | 30 - 90 |
| Germination temperacture (C°) | 10 |
| Germination luminosity | - |
| Germination treatment | - |
| Minimum temperature (C°) | - |
| Optimum temperature (C°) | - |
| Size | - |
| Vigor | - |
| Productivity | - |
| LSID | urn:lsid:ipni.org:names:712875-1 |
| WFO ID | wfo-0000461100 |
| COL ID | 4RGHV |
| BDTFX ID | 55056 |
| INPN ID | 117056 |
| Wikipedia (EN) | |
| Wikipedia (FR) | Link |