A plant (Psophocarpus tetragonolobus), also known as four-cornered bean, asparagus pea, goa bean, and manila bean, in the family Leguminosae. It is a climbing perennial that is usually grown as an annual. It has been suggested that it originated either in East Africa or Southeast Asia, but there is more evidence to support an African origin. However, Southeast Asia and the highlands of Papua New Guinea represent two foci of its domestication.