Climber or trailing shrub. Branchlets densely lenticellate. Leaves: petiole 5-13 mm long; blade papery, ovate or elliptic, 3.5-13.5 by 1.2-6.2 cm, 1.7-2.8 times as long as wide, apex abruptly acuminate, base rounded to cuneate, 5-9 pairs of veins anastomosing before margin. Inflorescence 3.5-13 cm long, 3-80-flowered; peduncles (4-)13-38 mm long; pedicels 2-4.5 mm long; bracts ovate, 1.5-5 by 1-2 mm. Sepals glabrous or, rarely, slightly puberulent, ovate, 1.5-3.2 by 1.5-2.5 mm, 1.1-1.3 times as long as wide. Corolla yellow at the base and reddish turning purplish at the mouth outside, lobes reddish or purplish, sometimes with a yellow edge; tube 5-10 mm long, widening in upper half, glabrous outside, puberulous inside; lobes ovate, 4-8.5 mm long, apex acuminate or apiculate, glabrous; corona lobes narrow triangular, 1.8-4 mm long. Stamens inserted at 3.2-6.5 mm from corolla base; anthers narrowly triangular, 4.3-4.8 mm long of which acumen 1.8-2 mm. Ovaries 0.8-1.5 mm high, glabrous or minutely pubescent; style and style head 4-8 mm long. Fruit tapering to a narrow apex, 15-21 by 1.3-2.3 cm, glabrous, sparsely lenticellate or not. Seeds: grain 15-20 by 1.5-3 mm; pubescent; beak glabrous for 3-12 mm and bearing a coma for 15-38 mm, coma 58-70 mm long.
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