Herbs, rhizomatous. Rhizomes stout, 6-30 mm in diam.; internodes 6-12 mm. Leaves all basal; stipules ovate-triangular, apex obtuse or emarginate; petiole terete, 15-35 × 4.5-7 mm; blade green throughout, broadly ovate or suborbicular, 16-38 × 12-26 cm, slightly rugose, basally 6-8-veined, base deeply cordate, margin denticulate-ciliolate, apex shortly acuminate or acute. Inflorescences axillary, flowers 25-57 in a dichasial cyme; peduncle 14-28 cm; bracts broadly ovate to orbicular, 2-5.5 × 2-5 mm, margin denticulate and ciliate. Staminate flowers: pedicel 1-3 cm, pilose; tepals 4, outer 2 suborbicular; inner 2 oblong or obovate; androecium zygomorphic; stamens 28-40; anthers oblong-obovoid, apex subemarginate. Pistillate flowers: pendent, pedicel 1.3-1.9 cm; tepals 3, outer 2 suborbicular or oblate; ovary ellipsoid or ovoid-ellipsoid, 3-winged, 1-loculed with parietal placentation; styles 3, slightly spiraled. Capsule nodding, 13-14 × 5-6 mm. Fl. Dec-Mar, fr. 2n = 30*.
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