Moist herbs. Tubers are usually ovoid, often grow many small bulbs, all rich in starch. Leaves 2-3 or more. The petiole is longer than the leaf, 20-90 cm long, green, ovate, 20-50 cm long, the apex is short and acute or short and acuminate, 4 pairs of lateral veins extend obliquely to the leaf margin, the posterior lobes are rounded, the connate length is 1/2-1/3, the curvature is blunt, 3-5 cm deep, the basal veins intersect at an angle of 30 degrees, the lateral veins are 2-3, and the internal veins are 1-2, not obvious. Inflorescence petiole often solitary, shorter than petiole. The length of the spathe varies, generally about 20 cm: the tube is green, about 4 cm long, 2.2 cm thick, and long oval; The eaves are lanceolate or oval, about 17 cm long, spreading into a boat shape, with the edges rolled inside, yellowish to greenish white. Spike inflorescence is about 10 cm long, shorter than the flame bud: female inflorescence is long panicle, 3-3.5 cm long, 1.2 cm thick at the lower part; The neutral inflorescence is about 3-3.3 cm long, thin cylindrical; Male inflorescences cylindrical, 4-4.5 cm long, 7 mm thick, apex abruptly narrow; The appendages are subulate, about 1 cm long and less than 1 mm thick. The flowering period is from February to April (Yunnan) to August to September (Qinling).