Shrubs 1-5 m tall, nearly climbing. Branches brown; branchlets with small yellow lenticels. Leaves unequal in pairs, easily deciduous; petiole robust, 0.5-6 cm; leaf blade elliptic to ovate, (3-)5-11 X (2-)4-8 cm, papery, abaxially tomentose, adaxially pubescent, base rounded to subcordate and oblique, margin entire or dentate below middle, apex acuminate to obtuse; veins (4 or) 5-7 pairs, abaxially elevated, 3-veined near base. Inflorescences 1.5-5(-6) cm across; peduncle 0.5-1.8 cm; bracts linear-lanceolate, 4-8 mm. CalyX campanulate, 2-3 mm, slightly 2-lipped, 5-dentate, outside minutely hirsute and glandular. Corolla white or yellowish green, tube longer than calyx, slightly 2-lipped, lower lip deeply 3-lobed, upper lip slightly 2-lobed, villous in throat. Anthers brown. Ovary glabrous. Style as long as stamens. Fruiting calyx ca. 5 mm in diam. Fruit dark black when mature, obovate to globose, 2-4 mm in diam., tuberculate.

500-1800 m. W Guangxi, SW Guizhou, Yunnan [Vietnam]