A glabrous twiner. Adult stems woody, pale brown, terete, smooth or minutely verrucose; young branches green. Leaves orbicular or transverse-elliptic in outline, 6-12 by 6-12 cm, (3-)5(-7)-lobed mostly far beyond the middle, the middle lobe elliptic or lanceolate, 5-8 by 2-5 cm, attenuate towards both ends, acuminate at the apex with a narrow, acute or obtusish, mucronulate acumen; the lateral lobes slightly smaller, obliquely ovate to lanceolate, long-acuminate, the basal lobes much smaller; leaf-base cordate with broadly rounded sinus; rarely the leaf-margin is entire or coarsely dentate; petiole slender, 4½-12 cm. Inflorescences axillary, one-flowered, or dichasial or partly monochasial and few-flowered; peduncles 2-14 cm, terete, smooth. Pedicels more or less angular, thickened towards the calyx, 13-30 mm long. Sepals pale green, very unequal, the outer ones much snorter than the inner; sepals 1 & 2 coriaceous, broadly elliptic to orbicular, broadly rounded at the apex, mucronulate, 8-12 and 10-18 mm long; inner sepals coriaceous with scarious margin; sepal 3 broadly elliptic to orbicular, broadly rounded, mucronulate, ca 16-25 mm; sepals 4 & 5 broadly elliptic, rounded and mucronulate, ca 20-30 mm. Corolla white with reddish midpetaline bands, or entirely white, salver-shaped, 11-14 cm long, tube long and narrow, 8-9 cm, limb ca 10 cm diam. Stamens and style exserted. Filaments inserted near the base of the corolla, hairy at their base. Ovary glabrous. Capsule broadly ovoid to globose, 2½-3 cm long. Seeds 7-9 mm long, densely brown-tomentose and with long (10-12 mm) brownish sericeous patent hairs along the edges.
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