Petiole 2-4(-11) cm, short strigose; leaf blade oblanceolate, elliptic, sometimes falcate, 5-13(-16) X 1.5-4(-6.8) cm, short strigose, margin nearly entire to dentate, denticulate, or crenulate, apex acute to acuminate. Peduncle 4-11 cm, short strigose; bracts linear, 3-9 mm. Calyx segments linear, 2-5 X 0.2-0.3 mm, outside sparsely short strigose. Corolla 4-8 mm; tube 3-5 mm; lobes triangular, (0.8-)1-2.1(-3) mm. Stamens glabrous; filaments 2-4 mm; anthers 1.8-2.2 mm; staminodes ca. 0.3 mm. Pistil 6-9 mm, glabrous. Style 3.8-4.8 mm. Capsule 1.2-22 cm. Fl. Jun-Sep.

* Rocks in shaded areas in valley, forests on limestone hills; 200-1000 m. N Guangdong, N Guangxi, E Guizhou, SW Hubei, Hunan.