Description from Flora of China
Shrubs, erect to climbing. Petiole 0.5-2 mm; leaf blade ovate-oblong to ovate, 4-11 X 3-4.5 cm, papery, abaxially dark yellow glandular, base truncate to subcordate, margin entire or sparsely serrate above middle, apex long acuminate. Panicles 2.5-17 X 2-5 cm. Calyx cup-shaped, 1-2 mm, slightly 2-lipped, 5-dentate, upper teeth obtuse, outside pubescent or glabrous and small yellow glandular. Corolla yellow or white, (3-)8 mm, tube slender, outside minutely tomentose or glabrous and glandular, inside glabrous except white villous at throat. Filaments glabrous. Ovary glabrous, apically yellow glandular. Style ca. 5.5 mm. Fruit subglobose, ca. 4 mm in diam. Fl. and fr. May-Jul.
* 1000-1200 m. Guangdong, Guangxi, Hainan