Herbs. Rhizomes elongate, 4-6 mm in diam. Leaves basal; stipules ovate or broadly triangular, 8-9 × 5.6-8 mm, abaxially brown hairy, apex cuspidate; petiole 10-14.5(-20) cm, brown hairy; blade green or red-purple on veins or with red-purple veins on green lamina, sometimes with white spots between veins, broadly ovate, strongly asymmetric, 5-11.6 × 4-9.4 cm, densely villous, venation palmate, 5-7-veined, base strongly oblique, deeply cordate, margin densely and minutely denticulate, apex shortly acuminate or shortly caudate. Inflorescences 14-20 cm tall, sparsely brown villous; bracts broadly oblong or oblong-ovate, 5-6.8 × 1.5-2 mm, abaxially brown villous, apex obtuse or acute. Staminate flowers: pedicel ca. 7 mm; tepals 4(or 5), pink, outer 2 suborbicular, 8-9 × 7-8 mm, abaxially villous, inner 2(or 3) oblong, 4-5 × 1.5-2 mm, apex acute; stamens numerous; filaments ca. 1.5 mm; anthers obovoid-oblong, ca. 1 mm. Pistillate flowers: pedicel 1-1.4 cm; tepals 5, unequal, largest suborbicular, ca. 10 × 9.3 mm, abaxially villous, smallest broadly obovate, ca. 6.5 × 3 mm; ovary oblong, ca. 4.5 × 2.5 mm, villous, 2-loculed; placentae axile, bilamellate; styles 3, fused at base; stigmas 2-cleft, spiraled. Capsule nodding, obovoid-oblong, unequally 3-winged; abaxial wing triangular or ligulate, 1.3-1.4 × ca. 1 cm, apex obtuse; lateral wings smaller. Fl. Jun-Sep, fr. Jul. 2n = 22*.
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