Description from Flora of China
Perennials, stemless. Rhizome internodes inconspicuous. Leaves basal, opposite, sessile; leaf blade linear to narrowly elliptic or narrowly oblanceolate, 3-8.3 cm X 4-8 mm, leathery, appressed pubescent, eglandular, base attenuate, margin entire, apex attenuate to acute; lateral veins 4 or 5 on each side of midrib, inconspicuous. Cymes 1-7-flowered; peduncle 5.5-15 cm, densely glandular puberulent and villous; bracts 2, free, lanceolate to ovate, 4-10 X 1.6-5 mm, puberulent to glabrous, margin entire, apex acute. Pedicel 5-12 mm, glandular puberulent. Calyx 5-sect from base; segments equal, linear-lanceolate, 3.2-4 X 0.6-1.1 mm, outside puberulent, inside glabrous, margin entire, apex attenuate. Corolla white to pale bluish, ca. 2.4 cm, outside puberulent, inside basally sparsely puberulent; tube narrowly funnelform, ca. 1.4 cm X 6-7 mm; adaxial lip ca. 4 mm; abaxial lip ca. 9 mm. Filaments ca. 1 cm, puberulent basally; anthers fused by entire adaxial surfaces, ca. 2.5 mm, bearded; staminodes 2, 7-8 mm. Pistil ca. 1.6 cm, glandular puberulent; ovary ca. 1 cm. Stigma obtrapeziform, ca. 0.5 mm, 2-parted. Capsule erect, 2.2-3.6 cm. Fl. Apr, fr. Jun.
* Rocks on limestone hills; 100-300 m. S Guangxi (Long'an Xian).