Four-angled Bean Flower

Photos of four-angled bean (or a winged bean) flower. The Winged bean (Psophocarpus tetragonolobus), also known as the Goa bean (kacang botol in Malaysia) and Asparagus Pea and Winged Pea (Lotus tetragonolobus), is a tropical legume plant native to Papua New Guinea. It grows abundantly in hot, humid equatorial countries, from the Philippines and Indonesia to India, Burma, Thailand and Sri Lanka. It does well in humid tropics with high rainfall. There are also varieties that can be grown in most areas of the U.S.