Dioscorea oppositifolia

Dioscorea oppositifolia is a type of yam (Dioscorea) native to Myanmar (Burma) and to the Indian Subcontinent (India, Sri Lanka, Bangladesh).

Taxonomy
The plant previously called D. opposita is now considered to be the same species as D. oppositifolia. However Dioscorea polystachya is often incorrectly called Dioscorea opposita as well. Botanical works that point out that error may list, e.g., Dioscorea opposita auct. non Thunb. as a synonym of D. polystachya.