Herb cordata (English name HERBA HOUTTUYNIAE) is China's pharmacopoeia collected herbs, herbal source for saururaceae plants houttrynia cordata Thunb (Latin name, Houttuynia cordata Thunb.) the dry above ground.H. cordata mainly grows in the three provinces cold wet mountainous areas in southwestern China, stem leafiness flowers ear for cutting in the summer, to remove impurities, dry.