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Liana, provided with simple tendrils and spines. Twigs puberulous, early glabrescent. Leaves 3-12 by 1½-7 cm, ratio 1-2, widest below, sometimes about the middle, chartaceous to thin-coriaceous, smooth and glabrous; base rounded to cordate, exceptionally obtuse; apex not or tapering short-acuminate, acute to blunt, mucronate; 3-5-plinerved; petiole 4-10 mm. Inflorescences terminal on short axillary shoots, rather lax and fairly many-flowered, 2-4 cm long. Flowers 5-merous. Calyx outside puberulous, inside glabrous, sepals acute, 1-1.5 mm long. Corolla c. 1 cm long, the tube about as long as the lobes, outside papillose but not hairy, inside woolly in the mouth and on the lower part of the lobes. Stamens inserted about the mouth, filament 3-4 mm long, anther oblong, 1¾-2 mm long, glabrous, blunt. Pistil c. 1 cm long, glabrous. Pedicels in fruit only slightly thickened. Fruits globular, 2-4 cm ø, thin-walled. Seeds 1 or 2 (rarely more), disk-shaped, c. 1½-1¾ cm ø, sericeous.
