Woody vines. Branches light brownish yellow, striate; branchlets often slightly twining, puberulent. Petiole deeply grooved, 3-7 cm, glabrous, apex slightly swollen; leaf blade ovate to broadly ovate, sometimes broadly ovate-rotund, 6-18 × 3-12 cm, leathery, both surfaces glabrous, base subtruncate or slightly cordate, rarely cuneate or slightly rounded, apex often cuspidate, palmately 5(-7)-veined, reticulate veins thin, dense, raised on both surfaces, conspicuous abaxially. Inflorescences axillary or borne on old and leafless branches, solitary or paired, narrowly paniculate thyrses, branching shorter than 1 cm. Male flowers: bracteoles 2, lanceolate-ovate, ca. 0.6 mm, closely adnate to sepals; sepals in 2 whorls of 3, subrotund, broadly ovate to rhombic-rotund, deeply emarginate, ca. 1.5 mm, margin thin; petals 6, cuneate, ca. 0.6 mm, with apical auricles clasping opposite stamen; stamens 6, slightly longer than petals, pollen cells large, divaricate, dehiscing with a transverse slit. Female flowers: sepals and petals as in male flower but petals with margin inflexed on both sides; staminodes absent; carpels 3, ovate-semispheroidal, style curved outward. Drupes oblate, 1.7-1.8 cm; endocarp subhelicoid-reniform, crustaceous, ca. 1.5 × 1.2 cm, reticulately ornamented on surface; condyle conspicuously curved. Seeds rotund; endosperm almost absent. Fl. Apr, fr. Dec-Jan.
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