Description from Flora of China
Stems 12-30 cm, glabrous. Leaves opposite; petiole 2-5 mm; leaf blade narrowly oblong to oblong lanceolate or narrowly elliptic, (1.8-)3-5.4 X (0.8-)1-1.5 cm, papery, glabrous, adaxially drying wrinkled, abaxially not punctate, base attenuate, margin entire, apex attenuate; lateral veins indistinct. Cymes axillary, 1-flowered; peduncle absent; bracts deciduous. Pedicel 1-2.2 cm, glabrous. Calyx green, 5-sect from base; segments narrowly lanceolate, 0.9-1.1 cm X 1.6-2.1 mm, outside glabrous. Corolla red, ca. 2.8 cm, outside puberulent, inside glabrous, mouth not oblique; limb indistinctly 2-lipped, lips equal, ca. 2.5 mm. Stamens exserted; filaments ca. 1.2 cm; anthers coherent in pairs at apex, 1.2-2 mm; staminode ca. 0.5 mm. Pistil ca. 3.2 cm; ovary glabrous. Style less than 16 mm, with a few short hairs. Fruit and seeds unknown. Fl. Sep.
* On trees in forested valleys; ca. 1500 m. NW Yunnan (Gongshan Xian).