Trapa natans L.
var. bispinosa (Roxb.) Makino

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Photo: Bart Wursten
Katombora, Zambia

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Synonyms:
Common names:	Water chestnut (English)
Frequency:
Status:	Native
Description:	Floating aquatic herb. Leaves in floating rosettes, diamond-shaped with margins near the apex coarsely toothed, green above, red below, long petioles reddish, fleshy, swollen in the middle. Submerged leaves finely dissected, root-like. Flowers solitary in leaf axils, small, white. Fruit a triangular hard nut with 2-4 sharp horns.
Notes:
Derivation of specific name:	natans: floating or swimming
Habitat:	In deep permanent water in slow moving backwaters of rivers and lakes.
Altitude range: (metres)
Flowering time:	Mar - Apr
Worldwide distribution:	As for the family
Zimbabwe distribution:	W
Growth form:
Endemic status:
Red data list status:
Insects (whose larvae eat this species):
Spot characters:	Display spot characters for this species
Literature:

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Other sources of information about Trapa natans:

Flora of Mozambique: Trapa natans
African Plant Database: Trapa natans
Biodiversity Explorer (Biodiversity of southern Africa): Trapa natans
EOL (Encyclopedia of Life): Trapa natans
ePIC (electronic Plant Information Center): Trapa natans
Flora Zambesiaca web site: Trapa natans
Google: Web - Images - Scholar
GRIN (Germplasm Resources Information Network) taxonomy for plants report for Trapa natans
IPNI (International Plant Names Index): Trapa natans
JSTOR Plant Science: Trapa natans
Kew Herbarium catalogue: Trapa natans
Tropicos: Trapa natans
West African Plants database: Trapa natans

Trapa natans L. var. bispinosa (Roxb.) Makino