Lotus seeds are small nuts. It is ovoid, ovoid or ovoid, and its size varies with varieties. General length 1.6- 1.8cm, width 1. 1.2cm, 1000-grain weight 1 1438. With thin longitudinal stripes and wide veins. The center of one end is papillary, dark brown, with many cracks and slightly concave periphery. It's hard. The seed coat is thin and not easy to peel. Cotyledons 2, yellow and white, plump, with gaps in the middle, with green germs. Odorless, sweet and slightly astringent.

Red lotus seed is a processed product of lotus seed, purple and rectangular. Compared with white lotus seeds, it retains more seed coat parts. Fruit characteristics: the fruit is purplish red and rectangular.

Lotus seed is the seed of lotus. When the fruit is ripe in autumn, cut the lotus, take out the fruit and peel it off. After drying, it becomes red lotus seeds, and after peeling, it becomes white lotus seeds.