Description from Flora of China
Shrubs scandent. Branchlets 4-angled and twisted, hollow, glabrous. Leaves opposite, simple; petiole 4-10 mm, narrowly winged; leaf blade ovate to ovate-lanceolate or narrowly elliptic, 5-17.5 × 1.3-4.5(-6) cm, papery or membranous, base rounded, truncate, or cuneate, apex acuminate or acute; primary veins 5-9 on each side of midrib, arcuate. Flowers axillary, in 3-6-flowered lax racemose cyme, or in 3-flowered umbellate cymes; bracts linear, 1-6 mm. Pedicel 1-4 cm, thickened upward. Calyx campanulate, glabrous; lobes 5, subulate or deltate, 2-3 mm. Corolla white, salverform; tube 1-1.4 cm, not widened upward; lobes 5 or 6, oblong to lanceolate, 7-9 mm. Berry ripening blue-purple, globose or ellipsoid, 6-10 mm in diam. Fl. Jun-Sep, fr. Oct-Jan.
* Slopes, thickets; 1000-2200 m. W Guangxi, Guizhou, Yunnan