Synonymous Fistula, King Chicken Feet, and Hornet Seven (List of Medicinal Plants in Guangxi). The source is the rhizome of Polygonum cuspidatum of Polygonaceae. Plant morphology Polygonum leatherleaf perennial herb, up to 1 m. The rhizome is thick, curved, the skin is dark brown, hard, hairy and the meat is pink. The stems are hollow and jointed. Rooted leaves are large and long, with narrow wings at the base and red petiole; Cauline leaves are small. Spike terminal, dense lilac florets; Perianth 4 ~ 6-lobed; Stamens 2 ~ 8; Ovary triangular or protruding on both sides. Achene Born in a wet ravine on a high mountain. Distributed in Yunnan, Guangxi and other places. Collect in autumn, dig, wash and dry selenium. Nature and taste "New Selection of Guangxi Practical Chinese Herbal Medicine": astringent, slightly bitter, flat and non-toxic. Indications-With the effect of snake lotus, it can clear away heat, detoxify, astringe and promote granulation. Treat dysentery, diarrhea, carbuncle swelling, hemorrhoids, soup fire injury. ① New Selection of Guangxi Practical Chinese Herbal Medicine: detoxification, convergence and granulation. Treat poisonous snake bite, soup fire injury, dysentery and diarrhea. ② List of Guangxi Medicinal Plants: clearing away heat, astringing, removing stasis and replenishing blood after delivery. Treat gastrointestinal damp-heat, dysentery, chyme, carbuncle, hemorrhoids and fire injury.