The source is from rhizome of Fagopyrum cymosum (Trev.) Meisn., family Polygonaceae. The medicinal material is produced in the provinces of Shaanxi, Jiangsu, Jiangxi, and Zhejiang, etc., dug and collected in autumn, dried in the sun, cut into segments or small pieces for being used.

Medicinal Properties:
Bitter in flavor, neutral in nature and attributive to the lung, spleen and stomach meridians.

Actions:
Clear away heat and eliminate toxin, clear the lung to resolve phlegm.

 

Application
1. It is indicated for cough due to lung-heat, pulmonary abscess with vomiting of pus and blood. It can clear away lung-heat and eliminate toxin and is as a common medicinal herb like Yuxingcao (Herba Houttuyniae) to treat cough due to lung-heat and pulmonary abscess. The both medicinal herbs can be combined with each other or with others that clear away lung-heat and resolve phlegm.
2. It is used for carbuncle of heat type, erisipelas, snake-bite poisoning. It can be used internally or externally. It is effective for the fresh leaves to be ground singly into pieces for external application, or they can be used together with others that clear away heat and eliminate toxin.

Usage and Dosage:
15 -25 g is used in decoction for oral use. For pulmonary abscess, it should be stewed with water in a separated container.