Herbs. Rhizome 1-1.5 cm in diam. Stems 3-5 cm tall, 1-2 mm in diam. Leaves solitary or binary, basal; stipules caducous; petiole 7-20 cm, densely villous when young; blade asymmetric, narrowly ovate or ovate-oblong, 7-16.5 × 5.4-12.5 cm, abaxially setulose, adaxially sparsely setulose, venation palmate, 6-or 7-veined, base oblique, margin irregularly sharply serrate and irregularly shallowly lobed; lobes 5-7, apex acuminate. Inflorescence 11-15 cm tall, villous when young; pedicel 0.8-1.8 cm; bracts oblong, ca. 8 × 5 mm, abaxially pubescent, margin serrate, apex acute. Staminate flowers: tepals 4, outer 2 larger, broadly ovate, 8-10 × 5-6 mm, abaxially villous, inner 2 smaller, oblong, ca. 5 × 1.5 mm; stamens numerous; filaments free; anthers oblong or obovate-oblong, ca. 1 mm. Pistillate flowers: tepals 3(or 4), outer 2 broadly ovate, 8-9 × 6-7 mm, inner 1 oblong, 5-6 × 2.5-3 mm; ovary villous, unequally 3-winged, 3-loculed; placentae bilamellate; styles 3, free, ca. 2 mm; stigmas globose. Capsule unequally 3-winged; abaxial wing falcate, ca. 2.3 × 0.8 cm; lateral wings smaller. Fl. Aug-Sep, fr. Sep.
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