Herbs, deciduous. Tubers globose, 1.1-1.8 cm in diam. Leaves 1(or 2), basal or sometimes 1 cauline; stipules caducous, membranous; petiole 21-41 cm, subglabrous or pilose; blade purplish on veins, suborbicular or oblate-orbicular, slightly asymmetric, (10-)13-23 × (13-)17-26 cm, abaxially subglabrous or sparsely hirsute, adaxially sparsely hirsute, venation palmate, 7-9-veined, base cordate, margin irregularly serrate, distinctly lobed, divided to 2/3 of leaf length; lobes 7-9, apex acute to acuminate; lobule present. Inflorescences terminal, racemose at base, 19-30 cm tall, glabrous; bracts caducous, ovate-lanceolate, ca. 5 mm, membranous, apex obtuse. Staminate flowers: pedicel 1.2-2.5 cm; tepals 4, pinkish, outer 2 broadly ovate, ca. 1.2 × 1 cm, inner 2 oblong, ca. 7 × 3 mm; stamens numerous; filaments ca. 1.2 mm, free; anthers obovoid, ca. 1.1 mm, apex emarginate. Pistillate flowers: pedicel 1.2-2.5 cm; tepals 3, pinkish, outer 2 ovate, ca. 10 × 8 mm, inner 2 oblong, ca. 5.5 × 3 mm; ovary glabrous, veins distinct, 3-loculed; placentae axile, bilamellate; styles 3, fused at base; styles 3; stigmas 2-cleft, spiraled. Capsule pendulous, ovoid-oblong, 1.2-1.5 cm × 7-8 mm, unequally 3-winged; abaxial wing triangular, 2-2.4 × ca. 1.2 cm; lateral wings smaller, ca. 1.2 cm. Fl. Aug, fr. Sep.
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