Lianas to 12 m. Stems pubescent along 2 lines, lenticellate. Petiole 2-3 cm; leaf blade ovate-oblong, 7-12 × 4.5-8 cm, papery, pubescent or glabrescent, base cordate, apex acuminate; lateral veins ca. 8 pairs. Cymes usually 2-4(-9)-flowered; peduncle 1.5-2 cm; bracteoles ovate, pubescent. Pedicel 2-3 cm. Sepals oblong, ca. 7 mm. Corolla white with purple juice; tube ca. 2 cm, glabrous outside; lobes falcate, ca. 3 cm × 5 mm, spreading. Gynostegium shorter than corolla tube. Corona lobes 5, shorter than anthers. Anthers apical appendages oblong-ovate, longer than stigma head; pollinia ellipsoid. Stigma head capitate, apex obscurely 2-lobed. Follicles lanceolate, ca. 12 × 1 cm, glabrous. Seeds oblong, ca. 1 cm; coma ca. 2.5 cm. Fl. May-Jun, fr. Sep-Nov.
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