Climber 5-15 (?) m, glabrous to glabrescent. Leaves spirally arranged, thinly coriaceous, glabrous, ovate-elliptic, mostly ± semi-orbicular, apex truncate to 3-lobed, mostly 1-2 mm mucro-nate, rarely acutish, base rounded to broadly cordate, 6-12 by 5-13 cm, sub-5-plinerved and with 1-2 pairs of smaller nerves higher up, ascending or straight, the upper two main nerves ending in the lobes, reticulation distinct; petiole 2-6½ cm. Glands on lamina absent or 1-2, small, ½-1 mm ø, submarginal in the sinusses between the lobes; petiolar glands 2, 1-2 mm ø, at 1/5-⅓ from the base. Stipules linear, ½(-1) mm. Inflorescences sessile with a central tendril, the two lateral main branches up to 8 mm stalked, 2-14-flowered; pedicels 5-15 mm; bracts and bracteoles linear, acute, ½-1½ mm. Tendrils 10-20 cm. Flowers glabrous, 3-4 cm ø; stipe c. 8-12 mm; hypanthium saucer-shaped, c. 2½ by 7 mm. Sepals lanceolate, 13-15 by 4-6 mm, with a minute subapical horn or wart c. ½ mm. Petals lanceolate, 10-13 by 3 mm. Corona double, outer corona filaments 5-8 mm, inner filaments 2-3 mm; inner corona 2 by 2-2½ mm, consisting of a densely plicate, ± inward curving 'collar' with subentire edge; disk c. ¼ mm. Androgynophore 7-8 mm. Filaments free, c. 7 mm; anthers oblong, obtuse, c. 4 by 1½ mm. Ovary sessile, ellipsoid, glabrous, c. 4 by 1½ mm; styles free, c. 7 mm; stigmas 1-1½ mm ø. Fruits c. 1-4 per inflorescence, subglobose to ellipsoid, (2-)2½ by 2 cm, glabrous; pericarp coriaceous, ½-1 mm ø. Seeds c. 60, obovate, c. 4½ by 3 by 1½ mm, 6-8 pits per ø.
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