Dioscorea hispida

Dioscorea hispida, also known as the Indian three-leaved yam, is a species of yam in the genus "Dioscorea", native to South and Southeast Asia. Known to be poisonous when fresh, caution and careful process will be made to make the root crop edible. 
Culinary use.
Several people use the rootcrop as food. Due to being poisonous when fresh, they slice it to thin strips, place a sack full of them in running water for a few days, dehydrated then cooked.