Description from Flora of China
Shrubs scandent, to 3 m. Branchlets terete, sparsely villous when young. Leaves opposite, simple; petiole 2-6 mm, twisted, articulate at middle, villous; leaf blade elliptic or narrowly ovate, rarely suborbicular, 2-5.5 × 1.5-2.7 cm, papery or thin leathery, glabrous adaxially except for hairy midrib, pubescent along midrib and tufted hairy at vein axils abaxially, base rounded or cuneate, apex acute or obtuse and mucronate; primary veins 2-4 on each side of midrib, slightly raised. Flowers solitary, terminal or axillary; bracts linear, 1-2 mm. Pedicel 0.8-2 cm, sparsely villous. Calyx glabrous outside, villous inside; lobes 6 or 7, linear, 5-8 mm. Corolla white or yellow-white, salverform; tube 1.5-2 cm; lobes 5, lanceolate, 1.3-2.2 cm. Berry didymous, black, ripening subglobose or ellipsoid, 7-12 × 5-7 mm. Fl. Aug-Sep, fr. Sep-Mar.
* Slopes, woods; low elevations. Hainan