Stem angular-sulcate, densely pubescent at nodes. Leaves papery, 3-foliolate, both surfaces hispidulous; petiole 3-6.5 cm, densely pubescent; median leaflet rhombic, (6-)8-12 × 3-5.5 cm, base broadly cuneate, margin crenate, apex shortly acuminate; lateral leaflets 4-9 × ca. 4 cm, outside subovate, base rounded, inside sublanceolate or oblanceolate, base attenuate, lateral veins 8 or 9; median petiolule 5-6 mm; lateral leaflets subsessile. Tendrils 2-fid. Male flowers in panicle; calyx segments oblong, ca. 0.75 × 0.3 mm, apex obtuse; corolla green; segments ± elliptic, apex acute or shortly acuminate; stamens ca. 1 mm, glabrous. Female flowers unknown. Fruit green, baccate, globose, 5-10 mm in diam., glabrous, 3-seeded. Seeds pale brown, broadly ovate, ca. 3(-5) × 3 mm, ca. 2 mm thick, compressed, both surfaces papillate, base subrounded, edges with furrow.
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