Grass Rhizome Grass Rhizome (Jiangsu Botanical Herbology), Lalang Grass Rhizome (Notes on Materia Medica), Lalang Grass Rhizome, Isatis indigotica, Rugen Rhizome (Classic), Dijian Rhizome, Biandu Rhizome (Other Records), Baihua Rhizome (Rihuazi Materia Medica) and Dijie Rhizome (Qinghai Medicinal Materials). The chemical composition contains a large amount of sucrose and glucose, a small amount of fructose, xylose, citric acid, oxalic acid and malic acid, and also contains 2 1% starch. It is reported that anemonin is separated from this product. The rhizome contains mannitol, glucose, fructose, sucrose, citric acid, malic acid, Coicis Semen, Arundo donax, indirubin, etc. Processed hay rhizome: clean impurities, wash, slightly moisten, cut into sections, dry in the sun and dust off impurities. Reed root charcoal: take reed root, put it in a pot and fry it with strong fire until it is black, spray clean water, take it out and dry it. Sweet and cold in nature. The dried rhizome of medicinal materials is slender and cylindrical, sometimes branched, with different lengths, generally 30 ~ 60 cm long and about 65438 0.5 mm in diameter, with milky white or yellowish white surface, light brownish yellow and slightly raised nodes; The spacing is about 3 cm. Lightweight and tough, not easy to break. The section is fibrous, with a yellow-white center and a small hole. The outer ring is white and full, or there are countless gaps like wheels, and the outer ring and center are easy to peel off. Slight breath, slightly sweet taste. It is best to be thick and fat, white in color, rootless and sweet.