Herbs. Rhizomes elongate, to 1 cm in diam. Stems 35-50 cm. Leaves basal and cauline; stipules caducous, narrowly ovate to ovate, to 9.7 × 3.6 mm, glabrous, margin entire, apex acuminate; petiole often reddish, to 16(-20) cm, hispid or villosulous; blade narrowly ovate to ovate, asymmetric, 7-16(-25) × 5-9(-14) cm, pilose to pilose-sericeous, venation palmate, 7-10-veined, base oblique, shallowly cordate, margin irregularly serrulate to denticulate, apex acuminate to cuspidate. Inflorescences to 25 cm, hispid; peduncle to 15 cm; bracts caducous, narrowly ovate, to 7.5 × 3.5 mm, papery, glabrous, margin entire, apex acuminate. Staminate flowers: tepals 4, white to pinkish, outer 2 broadly ovate to ovate, 0.7-2 × 0.6-1.7 cm, abaxially hairy, inner 2 oblanceolate to narrowly obovate, 0.8-1.7 cm × 4-9 mm; stamens 46-81; filaments free, 0.7-1.6 mm; anthers narrowly oblong to oblanceolate, 0.8-1.4 mm. Pistillate flowers: tepal 5, unequal to subequal, narrowly obovate to broadly obovate, largest 1-1.9 × 0.9-1.7 cm, abaxially hairy, smallest 6-19 × 5-14 mm; ovary hairy, 2-loculed; placentae axile, bilamellate; styles 2, 4-5(-5.7) mm, fused at base, stigmas 2-cleft, spiraled. Capsules nodding, trigonous, unequally 3-winged; abaxial wing triangular to ligulate, 1.3-2.8 × 0.9-1.9 cm; lateral wings smaller. 2n = 38*.
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