Herbs. Rhizomes elongate, 3-4 mm in diam. Leaves basal; stipules ovate-triangular, ca. 7 × 4 mm, glabrous, apex acuminate or acute; petiole 12-16 cm, brown hispidulous; blade ovate or oblate-orbicular, asymmetric, 7-8.5 × ca. 6.5 cm, abaxially hispidulous, adaxially glabrous or pilose, venation palmate, 6-veined, base oblique, cordate, margin irregularly denticulate, apex acute. Inflorescences 11-12 cm tall, brown hairy; peduncle 6.5-11.2 cm, subglabrous; bracts ovate-lanceolate, 1.3-1.4 cm × ca. 4 mm, glabrous, apex acuminate. Staminate flowers: pedicel ca. 1.8 cm; tepals 4, pale, outer 2 orbicular, ca. 1.7 × 1.6 cm, glabrous, inner 2 smaller, ca. 1.3 × 1 cm; stamens numerous; filaments ca. 1.8 mm, fused at base; anthers oblong, ca. 1.8 mm. Pistillate flowers: pedicel ca. 2.5 cm; tepals 5, glabrous, largest orbicular, ca. 1.2 cm, smallest elliptic, 1-1.2 cm × 4-6 mm; ovary glabrous, 3-loculed; placentae axile, bilamellate; styles 3; stigmas 2-cleft, spiraled. Capsule nodding, ellipsoid, ca. 1.4 × 1.2 cm, subequally 3-winged; abaxial wing broadly triangular, ca. 6 × 14 mm; lateral wings smaller. Fl. Apr, fr. Jul.
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