Lianas to 8 m. Branchlets pubescent along 2 lines, glabrescent. Petiole 1-2 cm; leaf blade ovate or broadly ovate-oblong, 7-11 × 4-6.5 cm, papery, glabrescent, base cordate, apex acuminate; lateral veins 6 or 7 pairs. Cymes shorter than leaves, to 12-flowered; peduncle 1-1.5 cm. Pedicel ca. 1.5 cm, densely pubescent. Sepals oblong, ca. 5 × 2 mm, pubescent, ciliate. Corolla white; tube 7-8 mm, glabrous outside, with 5 pairs of longitudinal lines of hairs inside; lobes oblong-falcate, ca. 7 mm, ciliate. Corona lobes minute, flat, shorter than anthers; pollinia ovoid. Stigma head capitate, apex obtuse. Follicles ovoid-lanceolate, ca. 13 × 2 cm, glabrous. Seeds oblong-ovate, margin membranous, ca. 10 × 5-6 mm; coma ca. 5.5 cm. Fl. May-Jun, fr. Aug-Dec.
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