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Shrubby climber 2.5–8(–?15) m. high, with a deep brown sharply ribbed stem up to 3.8 cm. wide at base. Leaves imparipinnate, 5-foliolate, (5–)15–25 cm. long, 8–20 cm. wide; petiole up to 10 cm. long, it and the rhachis winged, the wing 0.5–1.3 cm. wide; leaflets sessile or shortly stalked, ovate, elliptic or rhomboid, the terminal one 7–15 cm. long, 3.5–8 cm. wide, the laterals 3.5–10 cm. long, 1.7–5 cm. wide, acuminate, acute or obtuse at the apex, cordate, cuneate or narrowed at the base, subentire (rarely in our area), distantly dentate, serrate or shallowly lobed, subcoriaceous, glabrous, shining, with hairs present beneath on the venation and in tufts in the nerve axils; lateral nerves strong. Inflorescence a racemoid thyrse axillary in each of the upper leaves, 5–10 cm. long; peduncle 1–3×the length of the fertile portion, with apical pair of tightly coiled tendrils, or occasionally inflorescence sessile; inflorescence-axes brown-puberulent; pedicels 0–3 mm. long; flowers (3–)5–9 in cymose clusters, the terminal one often female and the remainder male. Flowers yellowish, creamy white or pink, scented, 5–6 mm. long; sepals ovate, unequal, outermost 1.5 mm. long, innermost 4 mm. long, pubescent on their outer surfaces; petals white, tongue-shaped, subequal, 5 mm. long, scale asymmetrically crested, ciliate, 3/4 of the length of the petal, yellow-tipped; disk to one side of the androgynophore, ciliate, consisting mainly of 2 large, plus 2 minute, ear-shaped glands. Stamens 8, 5 long and 3 short; anthers white; staminodes 8. Ovary pubescent; style trifid; rudimentary ovary much reduced. Fruit green, turning red or rose-red, obovoid or obovoid-oblong, 2.4–3.6 cm. long, 1.1–1.4 cm. wide, rounded or emarginate at the apex, mucronate, strongly narrowed at the base, 3-grooved, at first pubescent but later glabrous and finely rugulose, ultimately dehiscent. Seeds black, oblong-ellipsoid, 1–1.1 cm. long, 7–8 mm. wide; aril white. Fig. 26.