Water chestnuts in the Cyperaceae family are shallow watery perennial herbs, which are eaten as vegetables with bulbs. The ancient name was Jici (凫茈), commonly known as horseshoe, also known as ground chestnut, because it is shaped like a horseshoe and resembles a chestnut . Calling it a horseshoe only refers to its appearance; it is called a chestnut , not only in its shape, but also in its nature, flavor, composition, and function. It is also called a chestnut because it results in mud. Water chestnut skin color purple black, white flesh, sweet and juicy, crisp and delicious, since ancient times to snow pear reputation of northerners regarded as southern ginseng . Water chestnuts can be used as a fruit or as a vegetable. It is a popular seasonal product.