Lianas to 9 m. Young branchlets puberulent, soon glabrous. Petiole 1-1.5 cm; leaf blade elliptic, narrowly elliptic, or ovate, 6-14 X 2.5-5.5 cm, leathery, glabrous or puberulent when young, base cuneate or broadly so, apex acute to acuminate; lateral veins ca. 10 pairs. Cymes terminal, 3-branched, 4-9 X 6.5-15 cm, pubescent. Calyx pubescent, with several basal glands inside margin of sepals; sepals 1-1.2 cm, longer than corolla tube. Corolla white, tube 5-9 mm, slightly dilated at base, glabrous at throat; lobes obovate, 4-16 mm, apex rounded to obtuse. Stamens inserted at base of corolla tube; disc cup-shaped or 5-lobed. Ovary pubescent, shorter than disc. Follicles 2, cylindric, to 30 cm X 5-10 mm, pubescent when young, glabrous when older. Seeds oblong, flat, ca. 2 cm, coma 3.5-5 cm. Fl. Mar-Jul, fr. Aug-Dec.
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