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Scientific classification
- Kingdom: Plantae
- Division: Magnoliophyta
- Class: Magnoliopsida
- Order: Myrtales
- Family: Trapaceae
- Genus: Trapa
- Species: T. natans
Water caltrop
Water caltrop's Chinese name is Ling-Jiao.
The water caltrop or water chestnut refers to two species of the genus Trapa - T. natans and T. bicornis. Both species are floating annual aquatic plants, growing in slow-moving water up to 5 meters deep, native to warm temperate parts of Eurasia and Africa. They bear ornately shaped fruits that resemble the head of a bull, each containing a single very large starchy seed. It has been cultivated in China for at least 3,000 years for these seeds, which are boiled and sold as an occasional streetside snack in the south of that country.
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Stem of water caltrop |
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Leaf of water caltrop |
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The small white point is a flower of water caltrop |
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Fruit of water caltrop |
- Bibliography：
- ◎Wikipedia-water caltrop
http://zh.wikipedia.org/wiki/%E8%8F%B1 - ◎How to plant water caltrop
http://book.tndais.gov.tw/Brochure/tech79.htm