Leaf-lamina 3·5–12 × 4–14 cm., ovate or broadly ovate in outline, deeply cordate, setulose on veins and setulose to strongly scabrid-punctate above, hispid-setulose especially on veins beneath, shallowly to moderately palmately 3–5-lobed, the lobes triangular, ovate-triangular or ovate to ovate-oblong, obovate or elliptic, subentire or remotely and obscurely sinuate-denticulate to coarsely sinuate-dentate, sometimes shortly lobulate, acute to rounded, sometimes shortly retuse, apiculate, the central largest.
male flowers in short sessile or 0·7–3 cm. pedunculate racemes, often with a co-axillary 8–28 mm. pedicellate solitary flower; pedicels of racemose flowers 2–6·5 mm. long. Receptacle-tube 2·8–6·5 mm. long, obconic to broadly campanulate, hispid or setulose, lobes 3·5–7 mm. long, lanceolate, acute. Corolla yellow, lobes 1·2 cm. long, united in lower 1/3.
Female flowers solitary; pedicels 9–12 mm. long; ovary 8·5–9 × 1·5 mm., cylindrical; receptacle-tube 2 mm. long, campanulate, lobes 3–4 mm. long, lanceolate, acute.
Stems scandent, sparsely pubescent, setulose on ridges, becoming white-punctate when older, thickened at the base and developing thin, pallid bark.
Petioles 0·4–2·0 cm. long, usually short (less than 1 cm.) except for the lowermost leaves, shortly setulose.
Fruits c. 3·2 × 1·7 cm., ellipsoid, smooth, shortly rostrate; fruit-stalk 1–2·1 cm. long, hispid.
Seeds 5·8 × 4·2 × 1·5 mm., ovate in outline, compressed, pallid, bordered; testa fibrillose.
Probracts small, 3–5 mm. long, oblanceolate-spathulate.
Tendrils simple.