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male flowers solitary or in 2–6 cm. pedunculate bracteate clusters, usually with a co-axillary solitary flower; bracts small, 2–4 mm. long, rounded; pedicels of clustered flowers up to 20 mm. long, of solitary flowers up to 45 mm. long. Receptacle-tube 2–5 mm. long, broad and shallow, lobes 12–25 mm. long, ovate-acuminate. Corolla orange-yellow, green-veined, urceolate, the lobes 4·8–6·2 × 1·4–2·1 cm., united to the middle or above.
A pumpkin family vine. It grows 12 m long. The stems are brownish-green. They are angular. The tendrils divide into 2. The leaves are broadly oval or heart shaped. They have 5 triangle lobes. The leaves are 8-24 cm long by 8-28 cm wide. The male flowers are in groups of 2-4 and the female flower occurs singly. The fruit are red and cylinder shaped. They are 9 cm long and 3 cm wide.
Leaf-lamina 8–24 × 8–28 cm., ovate or broadly ovate in outline, cordate, bullate, densely scabrid-punctate above, densely asperulous on veins beneath, palmately 5-lobed, the lobes triangular, ovate or lanceolate, sinuate-denticulate, rounded to obtuse, apiculate, the central largest.
Female flowers solitary; peduncle 20–34 mm. long; ovary 13–24 × 2·5–5 mm., pubescent, 10-ribbed; receptacle-tube 3–4 mm. long, lobes 6·5–19 mm. long; corolla similar to that of male flower.
Fruit 6–10 × 2–3 cm., ellipsoid-cylindrical, 10-angled, red; fruit-stalk expanded upwards.
Seeds ovate, lenticular, compressed, rather small, unknown in mature condition.
Stems vigorous, scandent to 12 m., puberulous.
Petioles 3–12 cm. long, densely pubescent.
Probracts 3–5 mm. long.
Tendrils 2-fid.
