The winged bean (Psophocarpus tetragonolobus), also known as the Goa bean, four-angled bean, four-cornered bean, Manila bean, and dragon bean, is a tropical legume plant native to New Guinea.
It grows abundantly in the hot, humid equatorial countries of South and Southeast Asia. In Southeast Asia and Papua New Guinea it is widely known, but only cultivated on a small scale. Winged bean is widely recognised by farmers and consumers in southern Asia for its variety of uses and disease resistance. Winged bean is nutrient-rich, and all parts of the plant are edible. Leaves can be eaten like spinach, flowers can be used in salads, tubers can be eaten raw or cooked, seeds can be used in similar ways as the soybean. The winged bean is an underutilised species but has the potential to become a major multi-use food crop in the tropics of Asia, Africa, and Latin America.