Dioscorea bulbifera

Dioscorea bulbifera (commonly known as the air potato, air yam, bitter yam, cheeky yam, potato yam, aerial yam, and parsnip yam) is a species of true yam in the yam family, Dioscoreaceae. It is native to Africa, Asia and northern Australia. It is widely cultivated and has become naturalized in many regions (Latin America, the West Indies, the southeastern United States, and various oceanic islands).

It is also known as the up-yam in Nigerian Pidgin English, since the plant is cultivated more for its bulbils than for its tubers.