Herbs, scandent. Stem slender, angular-sulcate, glabrous. Leaves pedately 3-7-foliolate; petiole 2.5-5 cm; leaflets lanceolate or oblong-elliptic, median leaflets 4-10 cm, lateral leaflets shorter, glabrous or setose only on veins, base attenuate, margin irregularly crenate, apex acuminate. Tendrils slender, 2-fid. Male flowers in a panicle; rachis slender; calyx segments oblong-lanceolate, acute; corolla segments lanceolate, 1-veined, caudate-acuminate; anthers ovoid, 1-celled. Female flowers in a raceme; calyx and corolla as in male flowers; ovary globose, villous; ovules 2; styles 3, ca. 0.5 mm; stigmas half-moon-shaped, margin dentate. Capsule globose or subcampanulate, ca. 8 mm in diam., apex truncate. Seeds broadly cordate, 4.2-5 mm in diam., slightly compressed, both surfaces rugose-verrucose, margin narrowly winged. Fl. Jun-Aug, fr. Aug-Oct.
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