Plant glabrous. Stems twining, robust, terete, more or less woody, fistulose or with pith. Leaves broadly ovate to orbicular, sometimes oblong or rarely narrowly oblong, occasionally contracted about the middle, 8-18 by (3-)6—15 cm, broadly cordate at the base or in narrow leaves sometimes slightly cordate to truncate, more or less abruptly acuminate at the apex, with acute mucronulate point; often reddish brown when dry; nerves ca 7-8 on either side of the midrib; petiole thin, slender, 2-10 cm. Inflorescences one-to several-flowered. Peduncles shorter or longer than the petioles, 2-11 cm, terete at the base, applanate upwards. Pedicels 1-2(-3) cm long, clavate above, much thickened in fruit. Bracts oblong, 10-15 mm long, scarious. Sepals about equal in length, orbicular, broadly rounded or shallowly emargin-ate at the apex, 13-17 mm long, in fruit up to 20 mm; calyx in fruit cup-shaped and enclosing the capsule. Corolla broadly funnel-shaped, 4-5 cm long, pale yellow or rarely white; midpetaline bands densely sericeo-pilose outside. Filaments pubescent at the base as is the corolla inside below their insertion. Capsule 2½-3 cm diam.; seeds ca 7 mm long, dull black, with 2 pilose-papillose edges.
Thickets, edges of secondary forests, hedges, at low altitudes.
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