Description from Flora of China
Perennials, stemless. Rhizome internodes inconspicuous. Leaves basal, opposite; petiole 0.5-4 cm X 4-8 mm; leaf blade narrowly elliptic to rhombic-elliptic or ovate, 2.5-7.5 X 1.4-4 cm, papery, densely puberulent, eglandular, base oblique, cuneate, margin shallowly crenate, apex obtuse to rounded; lateral veins 4-6 on each side of midrib, inconspicuous. Cymes 1-5-flowered; peduncle 1.5-6 cm, densely spreading puberulent; bracts 2, free, linear to narrowly elliptic or narrowly triangular, 2-14 X 0.3-1.5 mm, puberulent, margin entire, apex acute. Pedicel 2.5-10 mm, densely spreading puberulent. Calyx 5-sect from base; segments equal, narrowly lanceolate, 5-7 X 1.2-2 mm, outside puberulent, inside glabrous, margin entire, apex acute. Corolla purple, 4-6 cm, outside puberulent, inside puberulent only on adaxial lip; tube tubular to narrowly funnelform, 2.5-3.8 X 1.2-2 cm; adaxial lip 0.9-1.2 cm; abaxial lip 1.1-1.5 cm. Filaments 1.1-1.2 cm, glabrous; anthers fused by entire adaxial surfaces, 4.5-5 mm, pubescent; staminodes 2, 5.5-7 mm. Pistil 2-3 cm, puberulent; ovary (0.4-)1.5-2.6 cm. Stigma obtrapezoid, 2.5-4 mm, 2-lobed. Capsule erect, 2.5-3.6 cm. Fl. Mar-Apr.
* Shaded forest areas in limestone hills; to 800 m. W Guangdong (Yunfu Xian), E and NE Guangxi.