Woody climber to over 25 m high. Branchlets glabrous. Leaves: petiole 6-19 mm long, glabrous; blade coriaceous, elliptic to obovate, 5.1-14.1 by 1.5-5 cm, 2.1-4.1 times as long as wide, apex shortly acuminate with a blunt apex, apiculate, rounded or weakly emarginate, base attenuate onto petiole, glabrous above and beneath, 22-35 pairs of secondary veins, weakly ascending, clearly visible above and beneath, tertiary venation of only slightly weaker intercalcated veins. Inflorescence axillary and terminal, delicate, ultimately umbelliform by contraction of terminal nodes, 4-7 cm long, axes sparsely and minutely puberulent; peduncle 1-3.7 mm long; pedicels 1.3-3.5 mm, glabrous, with 0 or 1 bracteoles. Calyx 0.7-1.1 mm long, connate at base, lobes ovate, 0.5-0.9 by 0.6-1.1 mm, 0.6-0.9 times as long as wide, apex rounded, glabrous, ciliate. Corolla yellow, tube 3.4-3.7 mm long, 3.1-4.9 times as long as sepals, 0.7-0.9 times as long as lobes, constricted above anthers, glabrous outside, densely pubescent below stamens inside; lobes falcate, 3.9-5 by 1.2-1.9 mm, 2.6-3.3 times as long as wide, apex acute to rounded, glabrous outside and inside. Stamens inserted at 2-2.4 mm from corolla base which is 0.6-0.7 of tube length; filaments 0.5-0.6 mm long; anthers 0.9-1 by 0.3-0.4 mm. Ovary 1.2-1.4 mm high; style and style head 1.1-1.6 mm long. Fruit ripening orange, linear, torulose, often distinctly twisted, 15-45 cm by 6-15 mm wide across dilations, dehiscing longitudinally into two. Seeds c. 6-10 by 6 by 4.5 mm.
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