Petiole 1-6 cm; leaf blade often asymmetric, elliptic to ovate, rarely obovate, (1.5-)3-6 X (1-)1.5-2.5 cm, adaxially appressed puberulent, glabrescent, abaxially densely appressed puberulent, base cuneate to nearly rounded, margin crenate, apex acute; lateral veins 4 or 5 on each side of midrib. Cymes 5-10-flowered; peduncle 4-6.5 cm, brown puberulent; bracts narrowly lanceolate, 2-5 X 0.5-0.8 mm, glabrous to sparsely pubescent, margin entire. Pedicel 4-12 mm. Calyx segments narrowly triangular, 2.5-3 mm. Corolla 5-11.3 mm, outside sparsely puberulent, glabrescent above middle; tube 3.8-10 mm; limb 5-lobed, lobes triangular, 1.2-3 X 0.5-1 mm. Stamens 2.5-3.5 mm. Pistil 5.5-12 mm; ovary sparsely puberulent. Style 4-9 mm, puberulent. Capsule 0.8-1.5 cm. Fl. Aug, fr. Jul-Aug.

* Shaded, stony cliffs; ca. 300-1200 m. Guizhou, Yunnan.