Liana. Twigs glabrous; branches purplish-brown with many orbicular, small, light yellow lenticels. Leaves elliptic to oblong (to lanceolate), 5-10 by 2¼-5.5 cm, chartaceous to thin-coriaceous, glabrous, base broadly cuneate to rounded, apex tapering acute-acuminate; 3-plinerved at the base, nerves near the margin; petiole 5-7 mm. Young twigs sometimes sparsely minutely hairy; leaves up to 11 cm long. Inflorescences axillary and terminal or pseudo-terminal, axillary ones usually on a quadrangular 1-1.5 cm long peduncle, and often with a pair of strong basal branches, thyrse oblong, (2-) 5-6 cm long, laxly branched and fairly many-flowered, densely and shortly tomentose-pubescent. Calyx 0.9 mm, sepals broad-ovate, blunt to rounded, outside subglabrous, inside glabrous. Corolla rotate, 3-4 mm long, glabrous outside, inside in the mouth long woolly hairy, tube 0.5-1 mm, lobes linear, acute. Stamens inserted in the mouth, filaments 1.5-2 mm long, glabrous, anthers bifid at the base, oblong to lanceolate, 1 mm long, slightly acuminate, densely barbate to long-ciliate all around. Ovary ellipsoid, 0.5 mm, for the greater part sparsely shaggy hairy, grading into the style, the latter 2-2.5 mm long and fairly thick, hairy in the basal part; stigma semi-globular. Fruits fairly many, globular, c. 2.5 cm ø. Seeds 1-2.
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