Scandent or trailing perennial herb or softly woody deciduous climber to 20 m; rootstock tuberous. Leaf-blade broadly ovate in outline, cordate, sinuate-dentate with glandular usually reddish teeth, punctate above, glabrous, 3.5–11.5 x 3.5–15.5 cm, obscurely pentagonal to deeply palmately 3–5-lobed, lobes triangular to elliptic or rhombic in outline, often lobulate, sometimes deeply so; petioles 0.5–5 cm long, glabrous. Tendrils simple. Male flowers solitary or 2–4 in shortly pedunculate clusters. Pedicels 7–70 mm long. Hypanthium obconic, expanded above, glabrous, 3–7 mm long. Sepals lanceolate, 2.5–6.5 mm long, often red at the apex. Corolla pale yellow with green veins, campanulate; petals 14–25 mm long, united in lower half. Female flowers solitary. Pedicels 4–25 mm long. Ovary ellipsoid, 3–14 mm long. Hypanthium cylindrical, 2–7 mm long. Sepals oblong-lanceolate, 2–4 mm long, red-tipped. Petals similar to those of male flowers, 20–35 mm long. Fruit globose to ellipsoid, green with paler green stripes, red when ripe, 3–7 x 1.5–3.5 cm. Pedicel 0.4–4 cm long. Seeds asymmetrically ovate in outline, compressed, c. 6 x 2.5–3 x 1.5 mm, fibrillose.
