Herbaceous creeper or climber to 5 m, perennial, essentially glabrous throughout; stem terete. Leaves 3-lobed to about half-way, subÂorbicular in outline, 4—10 X 4—11 cm, (3-) 5-plinerved, herbaceous, base rounded, truncate or cordate, subpeltate; lobes elliptic to oblong, up to 5 cm, apex obtuse or acutish, c. 1 mm mucronate; margin entire except for a few gland-teeth in or near the lobe-sinuses; petiole 3-6 cm; glands on petiole 2-5, scattered or ± paired at about the middle, slender, up to 1 mm long; blade-glands absent. Stipules ovate-oblong, straight, 1,5-4 cm long, entire or with a few minute gland-teeth, apex mucronulate. Inflorescences 1-flowered, the straight peduncle 3-6 cm, inserted besides a simple tendril 4—12 cm; bracts and bracteoles (broadly) ovate 1-1,5 cm, acute, entire or with a few minute gland-teeth at base, forming an involucre. Flowers 4-5,5 cm diam., white; hypanthium broadly cup-shaped, 7-10 mm wide; sepals oblong, 2-2,5 cm, obtuse, with a subapical horn 0,5-1 cm; petals oblong, 1,5-2 cm, acutish; corona composed of 4 or 5 series of threads, those of the outer 2 series 1 (-1,5) cm long, those of inner series 2-6 mm; operculum subplicate, fimbriate-laciniate for about half or less, and with a fringe of inward curved dentiform proÂcesses; disc annular; limen with lobulate edge, erect or ± reflexed at the top, closely surroundÂing androgynophore. Androgynophore 10-12 mm; filaments 5-6 mm, dilated; anthers 5-7 mm; ovary ellipsoid, c. 4 mm, glabrous; styles 8-10 mm. Fruit ± leathery, ellipsoid or sub-globose, excluding the 1,5-2 cm long gynophore 3,5-4,5 cm long, greenish turning yellow; seeds many, ellipsoid, 4-5 mm.
