Description from Flora of China
Shrubs scandent. Stems angular, sparsely appressed hispid. Petiole 3-5 cm, sparsely hispid; leaf blade lanceolate or ovate to ovate-elliptic, 10-20 X 3.5-11 cm, abaxially sparsely hispid or yellowish strigose, adaxially glabrous, base rounded to shallowly cordate, apex acute to obtuse; lateral veins 6-9 pairs. Cymes axillary, many flowered; peduncle (11-)13-15(-19) cm; bracts and bracteoles early deciduous. Pedicel 6-9 mm, short hispid. Sepals hispid outside; outer 2 elliptic, ca. 4 X 3 mm, apex rounded; inner 3 ovate to circular, apex rounded or emarginate. Corolla whitish to lilac, funnelform, 3.5-5.5 cm, midpetaline bands densely yellowish hirsute; limb shallowly 5-lobed. Stamens and pistil included; filaments villous basally. Ovary glabrous. Style ca. 2.5 cm; stigma 2-globular. Berry dark red, globose, 8-10 mm in diam., shiny. Seeds 4 or fewer, dark brown, 5-6 mm, smooth. Fl. Oct-Nov, fr. Nov-Feb.
Open forests in valleys, thickets, forest margins; 700-1000 m. S Yunnan [N Thailand]