Lotus is also called lotus. Perennial aquatic herbs of Nymphaeaceae. There is a horizontal rhizome, which is the lotus root that we eat every day. The leaves are round, above the water, with long petioles and thorns, and are shield-shaped. The flower at the top of the pedicel is solitary, with a diameter of10 ~ 20 cm; Sepals 5, caducous; Petals are mostly red, pink or white; Stamens are numerous; Carpels are numerous, free and embedded in sponge-like receptacle points. Nuts are ovoid or ovoid, commonly known as lotus seeds, and are 1.5 ~ 2.5 cm long. It is widely cultivated in the northern and southern provinces of China. Lotus is full of treasures. Lotus root, leaf, petiole, lotus whisker and rosette can all be used as medicine to clear away heat and stop bleeding. Lotus plumule (the germ of seeds) has the effects of clearing away heart fire, strengthening heart and lowering blood pressure; Lotus seeds (nuts) have the effects of strengthening the spleen, stopping diarrhea, nourishing the heart and benefiting the kidney. Lotus root can be used as a vegetable or to extract starch (lotus root powder). Lotus is one of the top ten famous flowers in China.