Perennial tubers, often cultivated as annual crops. The leaf is shield-shaped, the petiole is long and hypertrophy, green or purple; the base of the plant forms a shortened stem, which gradually accumulates nutrients and grows into a fleshy bulb, called ” taro ” or “mother taro”, spherical, oval, elliptical or massive Wait. The mother taro has a brain bud in each node, but the axillary buds in the middle and lower nodes have the strongest activity. The first tillering occurs and the small bulbs are called “child taro”. Under suitable conditions, great-grandson or great-grandson taro can be formed.