Herbs, deciduous. Tubers globose, 1.9-2.9 × 1-1.5 cm. Leaves basal or cauline (on very short stem); stipules small, caducous; petiole 6.5-24.6 cm, glabrous or hairy on upper part; blade ovate, slightly asymmetric, 10-25 × 6-22 cm, subglabrous to abaxially sparsely hirsute, adaxially hispidulous, venation palmate, 5-7-veined, base slightly oblique, cordate, margin unequally serrate, apex acuminate to acute. Inflorescences terminal, racemose at base, 2-6.5 cm tall, glabrous; bracts oblong, 3-4 × ca. 1.5 mm, margin remotely denticulate, apex acute. Staminate flowers: pedicel ca. 1 mm; tepals 4, pink, outer 2 oblong or ovate-oblong, ca. 1 × 6-7 mm, glabrous or abaxially hairy, apex rounded or acute, inner 2 elliptic, ca. 7 × 5 mm, apex obtuse or acute; stamens numerous; filaments fused to halfway or more, ca. 1 mm; anthers oblong, ca. 1.5 mm. Pistillate flowers: pedicel 8-9 mm; tepals 3(or 4), outer 2 broadly elliptic, 9-10 × ca. 6 mm, glabrous or abaxially hairy, apex rounded or obtuse, inner 1(or 2) narrowly oblong, 6-7 × 2-3 mm, apex rounded or obtuse; ovary glabrous or hairy, 3-loculed; placentae axile, bilamellate; styles 3, fused to halfway or more; stigmas 3, 2-cleft or U-shaped, spiraled or not. Capsule pendulous, oblong-obovoid, ca. 10 × 6-7 mm, unequally 3-winged; abaxial wing triangular; lateral wings much smaller, 0-3 mm. Fl. Aug, fr. Sep. 2n = 24*.
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