Stems to 1 m, glabrous. Leaves opposite; petiole 3-8 mm; leaf blade elliptic to broadly elliptic, ovate, or obovate, 2.2-7.2 X 1.4-3.9 cm, thin leathery to papery, glabrous, adaxially drying wrinkled, abaxially not punctate, base cuneate to rounded, margin entire, apex acute to rounded or acuminate; lateral veins indistinct to somewhat distinct. Cymes axillary, 1- or 2-flowered; peduncle absent; bracts deciduous. Pedicel 4-8 mm, sparsely puberulent. Calyx green, 5-sect from base; segments linear-lanceolate, 4-5 X ca. 1 mm, outside puberulent to glabrous. Corolla red, 2-2.7 cm, outside puberulent to glabrous, inside glabrous, mouth not oblique; limb indistinctly 2-lipped; adaxial lip ca. 5 mm; abaxial lip ca. 7 mm. Stamens exserted; filaments 1.1-1.4 cm; anthers coherent in pairs at apex, 1.2-1.5 mm; staminode ca. 0.8 mm. Pistil 2.8-3.2 cm; ovary glabrous. Style ca. 1 cm, sparsely puberulent. Capsule 8-26 cm. Seeds with 1 hairlike appendage at each end, appendages 0.9-1.5 cm. Fl. Jul, Oct, fr. Dec.

* Riverside rocks, trees, and cliffs of limestone hills in forests; 400-1500 m. W Guangxi, SW Guizhou, S and SE Yunnan.