Lianas to 5 m, densely to sparsely pubescent when young, glabrescent. Petiole 1-4 cm; leaf blade oblong to broadly ovate, 5-13 × 2-7 cm, thin papery, bluish when dry, base rounded to cordate, apex acuminate; lateral veins 5-7 (-10) pairs. Inflorescences dense, globose to long racemelike clusters of cymules, (1.5-)3-15 cm; peduncle (0.5-)2.5-5 cm. Pedicel 3-5 mm. Sepals suborbicular, ca. 2 mm. Corolla yellowish white, dark blue when dry, urceolate, 3.5-4(-6) mm long, throat with a ring of hairs, otherwise glabrous; tube ca. 2.5 mm; lobes ovate, 1-1.5 mm, apex rounded. Corona lobes 5, lanceolate, as long as anthers. Pollinia narrowly oblong. Stigma head discoid, slightly convex at apex. Follicles oblong-lanceolate, 5-10 cm × 8-10 mm, pilose to subtomentose. Seeds ovate, ca. 10 × 3 mm; coma 1-2 cm. Fl. Mar-Nov, fr. Jul-Dec.
Humid mixed woods at elevations of 400-1,000 metres in S. China. Climbing on trees or over rocks in primary and secondary forests at low and medium elevations. Also in thickets and on open ground, possibly as remnants of former cultivation.
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