Daphne genkwa Sieb. et Zucc

Yuanhua, Flos Genkwa, is the dry flower buds of Daphne genkwa Sieb. et Zucc. (Thymelaeaceae) collected in spring before blossom. It is officially listed in the Chinese Pharmacopoeia and is a traditional Chinese medicine used as a diuretic in treatment of ascites, edema, and asthma. Externally it is used against scabies and ulcer. In addition, the root bark of D. genkwa has also been used as a diuretic, especially in treatment of ascites in late-stage schistosomiasis.