Liana. Twigs glabrous; branchlets brown, with many minute lenticels. Leaves oblong(-ovate), 6.5-18 by 3½-9 cm, chartaceous, glabrous, base cuneate to rounded, sometimes slightly attenuate, apex blunt or gradually blunt-to acute-acuminate; 5-plinerved; petioles 0.5-1 cm long. Inflorescences axillary, 6-8 cm long, laxly branched, many-flowered, tomentose. Calyx 1.25-2 mm, sepals ovate, blunt to acute, glabrous. Corolla 5½-7 mm, inside from about halfway the tube to at least halfway the lobes woolly; tube 2-2.25 mm. Stamens inserted in the mouth, filaments 1-1.5 mm, glabrous, anthers oblong to ovate-lanceolate, 1.25-2 mm, apiculate, barbate. Pistil 5-6 mm, ovary woolly, style in the lower half with a few long woolly hairs. Fruit unknown.
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