Plants 30-50 cm tall. Rhizomes brown, short, stout, with numerous fibrous roots. Stems erect, pale stramineous, 3-5 mm in diam., angulate, glabrous. Leaves alternate; petiole of lower leaves 12-22 cm, petiole of upper leaves 3-7 cm, all petioles angulate; leaf blade abaxially pale green, adaxially deep green, suborbicular or reniform in gross outline, sharply diversiform, 7-8 × 13-15 cm, thinly papery, abaxially on veins scurfy squamulate, sometimes mixed pubescent, adaxially glabrous, 5-8-lobed, lobe margin scarcely inconspicuously serrulate. Inflorescence 2-5-fascicled flowers. Pedicel nutant, 3-6 cm, glabrous. Flowers attached far from base of blade, purple or pink. Sepals narrowly oblong, 10-12 × 4-5 mm, glabrous. Petals obovate or suborbicular, 1.4-1.6 × 1-1.2 cm, apex rounded. Stamens ca. 8 mm; filaments flat, shorter than anthers; apex of anther connective not prolonged. Pistil ca. 8 mm; ovary subglobose; style ca. 1 mm; stigma disciform, margin rugosely undulate. Berry pale green (immature), subglobose, ca. 8 mm in diam. Seeds numerous. Fl. May-Jun, fr. Jun-Aug.