Amorphophallus konjac is one of the largest flowers, a perennial exotic Asian plant. It grows a single, elongated center called a corm and a single large leaf that wraps around it. The corm is the part of the plant that is used, as well as its tuber, which is commonly called the konnyaku potato. It is one of the most exotic, bizarre flowers. Can be easily grown in a pot as a house plant. The single leaf dormant in winter, then in spring the plant shoots out a fantastic flower. See picture of a flowering plant.
The tubers are starchy and edible when cooked like a potato. It is commonly dried and ground into a flour and used in noodles and tofu. Can be toxic if eaten raw.