Stem slender, angular-sulcate, glabrous or pubescent at nodes. Leaves pedately 5-7-foliolate; petiole 2-2.5 cm, glabrous; leaflets obovate-elliptic, median leaflets 3-3.5 × ca. 1.5 cm, lateral leaflets smaller, membranous, abaxially glabrous, adaxially sparsely pubescent, lateral veins 6-9 pairs, base obtuse, margin crenate, apex obtuse-rounded, cuspidate; petiolule 2-5 mm, glabrous. Tendrils filiform, 2-fid. Male flowers unknown. Female flowers in a small 3-or 4-flowered panicle; bracts capillary; calyx segments very small, subulate; corolla segments lanceolate, ca. 1 mm, apex shortly acuminate; ovary globose, ca. 1 mm in diam., villous; styles 3, free, ca. 0.75 mm; stigma 2-lobed. Capsules aggregated in a dense 1.5-2 cm spike; fruit broadly campanulate, ca. 5 mm in diam., white pubescent, apex truncate. Seeds gray-brown, ovoid, ca. 3 × 2 mm, ca. 1 mm thick, verruculose, margin dentate. Fl. Jul-Aug, fr. Sep-Oct.
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