Colocasia gigantea (also called giant elephant ear or Indian taro) is a 1.5–3 m tall herb with a large, fibrous, inedible corm, producing at its apex a whorl of large leaves. The leaf stalk is used as a vegetable in some areas in South East Asia and Japan. Known as bạc hà in southern Vietnam and by Vietnamese speakers in the U.S (while it is called dọc mùng and bạc hà refers to a culinary mint herb in northern Vietnam), it is often used in canh chua and bún (rice vermicelli soup). In northern Vietnam, it's known as dọc mùng or rọc mùng.