Herbs, rhizomatous. Leaves all basal; blade peltate, basally 6(or 7)-veined, tertiary veins percurrent, mostly opposite, ± concave, spiderweblike. Inflorescences axillary, dichasial cymose. Staminate flowers: pedicel 1.5-3 cm; tepals 4, outer 2 broadly ovate, 1.6-1.9 × 1.4-1.7 cm, base subrounded, apex obtuse or rounded, outside hairy, inner 2 elliptic, 7-10 × 4-6 mm, apex obtuse; stamens numerous; anthers obovoid-oblong, apex subtruncate. Pistillate flowers: pedicel 3-6 cm; tepals 3, outer 2 suborbicular or broadly ovate, 1.5-1.8 × 1.6-2 cm, apex and base rounded, inner 1 elliptic; ovary ovoid-oblong, unequally 3 winged, 1-loculed with parietal placentation; styles 3, fused at base. Capsule nodding, 14-26 × 5-8 mm.
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