Lianas. Stems slender, to 5 m, glabrous, pubescent along 2 lines when young. Petiole 2-5 cm, flat, pubescent; leaf blade broadly ovate to oblong-ovate, 7-15 × 5-8 cm, papery, puberulent when young but soon glabrescent, base rounded to broadly cuneate, rarely subcordate, apex acuminate; basal veins 3-5, winged when young, lateral veins 3 or 4 pairs. Inflorescences umbel-like becoming racemelike, 2-6 cm, 10-20-flowered; peduncle 1.5-4.5 cm, puberulent. Pedicel (0.3-) 1-1.5 cm. Sepals ovate, ca. 1.5 mm. Corolla yellow, rotate to shallowly bowl-shaped, ca. 1 cm in diam.; tube 4-5 mm; lobes ovate-triangular, as long as tube. Corona lobes ligulate-oblong, base attenuate, apex obtuse, as long as corona tube. Anther appendages rounded; pollinia oblong, erect. Follicles narrowly divergent, linear-lanceolate, 10-15 cm × 5-10 mm, longitudinally striped. Seeds broadly ovate, ca. 1.5 × 1 cm; coma ca. 3 cm. Fl. Apr-Sep, fr. Jun-Dec.
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