Lotus seed Hunan Province where the origin of the most authentic. Lotus seed is a nutritious ingredient, widely used in cooking and medicinal purposes, in China, the lotus seed in Hunan Province is known as the best, Hunan is located in the subtropical monsoon climate zone, the climate is warm and humid, suitable for the growth of lotus seed. In addition, there are more lakes and rivers in Hunan Province, which are rich in water resources, providing a favorable environment for the growth of lotus seeds. In Hunan Province, the quality of lotus seed in Xiangtan City is the best, especially in Yutang District of Xiangtan City, which is considered to be of the best quality. Lotus seeds are small nuts. It is oval, ovate or ovoid, its size varies according to varieties, generally 1.6-1.8 cm long, 1.1-1.2 cm wide, 1,100-1,400 g per thousand grains, the pericarp is green and leathery in the young fruit stage, and then turns from green to brown, and brown, grayish-brown and blackish-brown when it is ripe. There are fine longitudinal lines and wider veins. The center of one end is nipple-like protruding, dark brown, more cracks, and its periphery is slightly sunken. The texture is hard. Seed coat thin, not easily peeled. Cotyledons 2, yellowish-white, plump, with gaps, with green rosette heart. Odorless, taste sweet, slightly astringent.