Perennial twining herbs. The underground conductor stems are spherical or cylindrical year by year, with brown-black skin and dense fibrous roots. The stem is cylindrical, smooth, light green and reddish purple; Spherical or oval beads (or Reiyoshi) often appear in leaf axils, with different sizes and yellowish brown epidermis. Leaves alternate, heart-shaped, oval, 7-15cm long, 6-14cm wide, acute at the apex, heart-shaped at the base, entire, dark green above, light green below, obvious veins, 7-9, basal; Petiole base twisted, slightly wider, as long as leaves or slightly shorter. Flowers are unisexual and dioecious; Spikes axillary; Male inflorescence is slender, 1-5, pendulous, 3- 10 cm long, 6 perianth, lanceolate, 6 stamens and very short filaments; Female inflorescence 10-25 cm long, pendulous. Female flowers erect, 6 staminodes, inferior ovary, 3-loculed, irregularly 2-3-lobed stigma. Capsule pendulous, oblong, 3-winged, 3-valved. The seeds are diamond-shaped. It is sickle-shaped, brown and has membranous wings. The flowering period is August-September, and the fruiting period is 9-65438+1October.