Eleocharis dulcis, the chinese water chestnut or water chestnut, is a grass-like sedge native to asia, tropical africa, and oceania. it is grown in many countries for its edible corms.the water chestnut is not a nut, but an aquatic vegetable that grows in marshes, under water, in the mud. it has stem-like, tubular green leaves that grow to about 1.5 m (5 ft). the water caltrop, which also is referred to by the same name, is unrelated and often confused with the water chestnut. the small, rounded corms have a crisp, white flesh and may be eaten raw, slightly boiled, or grilled, and often are pickled or tinned. they are a popular ingredient in chinese dishes. in china, they are most often e...

Source: Wikipedia