Petiole 3-14.5 cm, appressed pubescent; leaf blade ovate, 4.5-11 X 2-4.2 cm, densely puberulent to sericeous, margin dentate, apex acute. Peduncle 9-22 cm, appressed pubescent; bracts lanceolate to ovate, 1-2 X 0.2-1.2 cm, appressed puberulent, margin entire to denticulate. Calyx segments linear, 3-7 X 0.3-0.8 mm, outside puberulent. Corolla 1.9-2.5 cm; tube 1.5-2.1 cm; adaxial lip ca. 4 mm, lobes deltoid, 1-1.5 mm; abaxial lip broadly triangular, 2-4 mm. Filaments 4-6 mm, sparsely glandular puberulent; anthers ca. 1.8 mm; staminodes ca. 0.5 mm. Pistil 2.1-2.5 cm; ovary glabrous. Style ca. 1 cm, sparsely glandular puberulent. Capsule 4.5-7 cm. Fl. Apr-Jun.

Rocks in forests on limestone hills; 1000-1500 m. W Guangxi, SE Yunnan [N Vietnam].