Herbs. Rhizomes elongate; 1.2-2 cm in diam. Leaves basal; stipules persistent, ovate-lanceolate, 1.3-2.6 cm, hairy, apex acuminate; petiole 11-35 cm, sulcate, densely villous; blade dark green, broadly ovate, asymmetric, 26-33 × 17-25 cm, herbaceous, abaxially pubescent, adaxially sparsely pubescent when young, venation palmate, base oblique, cordate, margin very shallowly lobed, apex acute to acuminate. Inflorescences 9-43 cm, villous; peduncle 4-28 cm, 3-6 mm in diam.; bracts caducous, ca. 2.3 × 1.6 cm. Staminate flowers: pedicel 1.1-4.2 cm; tepals 4, white or pinkish, glabrous, outer 2 ovate, 12-15 × 9-15 mm, inner 2 oblong, 12-18 × 7-12 mm; stamens 50-150; filaments fused to halfway; anthers narrowly ovoid to oblong, apex acute. Pistillate flowers: pedicel 2.8-4.2 cm; ovary glabrous, 2-loculed; placentae axile, bilamellate; tepals 5, white or pinkish, elliptic-oblong, glabrous, unequal, largest 10-15 × 8-13 mm, smallest 11-18 × 5-11 mm; styles 2, fused to halfway, 6.2-9.2 mm; stigmas 2-cleft, spiraled. Capsule nodding, ca. 2 cm, unequally 3-winged; abaxial wing ligulate, 1.5-2.4 cm; lateral wings 4-6 mm.
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