Lianas to 10 m, most parts densely yellowish tomentose. Petiole 1-4.5 cm; leaf blade ovate, 9-19 × 4-12 cm, subleathery, base cordate, apex acute and mucronate; lateral veins 7-10 pairs. Peduncle ca. 2 cm. Pedicel ca. 1 cm. Sepals oblong-lanceolate, ca. 2.6 × 0.8 mm, leaflike. Corolla white, salverform, ca. 4.5 cm in diam.; tube ca. 5 cm, dilated at base, puberulent outside, with 5 longitudinal lines of hairs inside; lobes oblong-falcate, ca. 3.5 × 1.3 cm, puberulent outside, glabrous inside. Corona absent. Anthers subquadrangular, apical appendages oblong, covering stigma head; pollinia oblong. Stigma head conical. Follicles lanceolate, ca. 21 × 2.7 cm, glabrous. Seeds ovate, ca. 2 × 1 cm, margin membranous; coma ca. 4 cm. Fl. summer.
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