This herb is the dried root of Stemona sessilifolia (Miq.), S. japonica Miq., or S. tuberosa Lour. of the family Stemonaceae. It is mainly grown in the Anhui, Hubei, Jiangsu, Shandong, and Zheziang provinces of China, where it is collected in the autumn. The rootlets are removed, sliced, and dried, and the result is known as dried stemona root. If the root is briefly steamed, dried, and sliced, it is called processed stemona root. The plant is related to A. lucidus and is sometimes called wild asparagus.
Traditionally, stemona root was used as a carminative, anthelmintic, and as an insecticide. Today, stemona root is used to relieve cough due to acute or chronic bronchitis, bronchial asthma, and used externally as an anthelmintic and as an insecticide for enterobiasis and lice.
For external application, the decoction is used as an enema or applied on the affected area of the skin in a paste form with wine.