Description from Flora of China
Shrubs evergreen, erect or scandent, ca. 3 m tall. Twigs subterete, lenticels many; bud scales inconspicuous. Leaves scattered; petiole 6–8 mm, glabrous; leaf blade elliptic or ovate, 11–17.5 × 5.5–9 cm, leathery, abaxially densely brownish glandular hairy, adaxially subglabrous, secondary veins 8–12 pairs, secondary and fine veins raised abaxially and strongly impressed adaxially, base rounded or broadly cuneate, margin revolute, entire, with 1 basal gland per side, apex abruptly acuminate or shortly caudate-acuminate. Inflorescence racemose, 1.5–3 cm, glabrous, 6–10-flowered; bracts caducous, obovate-spatulate, 1–1.2 cm. Pedicel 4–7 mm, glabrous. Hypanthium ca. 1.5 mm, glabrous; calyx lobes triangular-lanceolate, 4–6 mm, strongly veined. Corolla white to pink or dark red, campanulate, 8–10 mm, glabrous; lobes ovate-triangular, 2.5–4 mm. Filaments 1–1.5 mm, glabrous or pilose; anthers ca. 6 mm, with 2 spreading spurs; tubules 2–3 × as long as thecae. Immature berry 10-pseudoloculed, globose. Fl. Feb–Apr, fr. after May.
Evergreen forests on calcareous mountains; 1000–1700 m. SE Yunnan.