Stems twining, up to 5 m; young parts shortly hairy, later glabrescent to glabrous. Leaves ovate ornarrowly elliptic, 4-10 by 2-6 cm, base rounded, apex acutish, obtuse or shortly acuminate, mucronulate, margins subrevolute; upper surface glabrous or with hairs on midrib; lower surface shortly pilose with laxly appressed hairs; midrib and 6-8 nerves on either side prominent beneath; petiole 1-2(-6) cm, shortly pilose. Peduncles in the axils of the upper leaves, exceeding the petioles, 2—5(-15) cm, sparsely pilose to glabrous, sulcate or angular, umbellately cymose at the apex, many-flowered. Pedicels 2-3 mm, thickened towards the apex. Bracts oblong or linear, crisped, lower ones ca 1 cm (or longer, up to 2 cm), caducous. Sepals glabrous or sparsely short-pilose outside, 2 outer ones broadly ovate to ovate-oblong, not or slightly crisped, rounded (or obtuse) at the apex, with inflexed margins, ca 7-9(-10) mm long; sepal 3 broader, 5-6 mm long; 2 inner sepals ca 5-5½ mm long, strongly concave and cucullate, finally deeply emarginate at the apex (always?). Corolla campanulate to funnel-shaped, ca 3 cm long, violet, paler to white at the margin, shallowly lobed, lobes soon reflexed; midpetaline bands sub-hirsute, rest of corolla glabrous. Stamens and style included. Base of filaments thickened, glabrous. Ovary glabrous, 2-celled. Fruit ellpsoid, apiculate, ca 17 mm long, pink.
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