Dioscorea wallichii

Dioscorea wallichii is a type of climbing tuberous geophyte of the family Dioscoreaceae. It is native to Bangladesh, China, India, Malaysia, Myanmar, and Thailand. It has one edible cylindrical tuber that is about 1 meter long and 3-6 centimeters wide. The tuber is white when young, becoming yellow and stringy once aged.

Uses
The tubers can be eaten after boiling and washing.