Dioscorea cirrhosa
Dioscorea cirrhosa, commonly known as the dyeing yam, is a species of flowering plant in the family Dioscoreaceae. It is a perennial, dioecious climbing vine native to Southeast Asia.
Description
Dioscorea cirrhosa is a right-twining vine that grows annually from a tuberous rhizome. Its stems can reach lengths of up to 10 meters. The plant features heart-shaped leaves and is dioecious, meaning male and female flowers are borne on separate plants.
Distribution and habitat
This species is native to regions of Indo-China, including northeastern Thailand, Laos, and Vietnam, as well as southeastern China, Hong Kong, Taiwan, and the southern Ryukyu Islands. It typically grows in subtropical forest understories, where it climbs over other vegetation to access sunlight.
Uses
Dioscorea cirrhosa has historically been used as a source of dye. The plant's tuber was once traded internationally for its dyeing properties, making it an important economic resource in certain regions.