Korea Flora: Deciduous vine. Height up to 10m. Branchlets with indistinct ridges, reddish in color, covered with pubescence when young. Leaves alternate, broadly ovate, apex acute, base cordate, shallowly 5-lobed at the tip, size 8-20(25)cm × 10-15cm. Upper surface glabrous, lower surface almost hairless (except for main veins), pale green, turning red in autumn. Petiole length 5-10cm. Flowers in panicles opposite to leaves, often developing tendrils at the base of the peduncle. Inflorescence short, 6-8cm long. Flowers yellowish-green, calyx annular, 5 petals fused at the tip and separating from the calyx at the base, 5 stamens with nectaries between the filaments. Fruit a berry, in clusters hanging downwards, 8-10mm in diameter, black, containing 2-3 seeds.

Sporophyte chromosome number: 38.

Flowering : Mid-May to mid-July

Fruiting: Mid-August to early September

Distribution: Northeastern China (including coastal central China in Zhejiang), central Honshu in Japan; throughout Korea.