Description from Flora of China
Shrubs 1.5-6 m. Branchlets terete, glabrous or pubescent. Petiole 1-3 cm; leaf blade ovate-oblong, oblong-lanceolate, elliptic, to elliptic-obovate, 5-19 × 1.5-7(-9) cm, adaxially glabrous or pubescent along midrib, abaxially pubescent or denser along veins, base cuneate, apex acute to long acuminate. Panicles terminal, nodding to pendulous, compact or lax, 4-25 × 3-13 cm; rachis, pedicel, and calyx densely pubescent to glabrous. Pedicel 0-1.5 mm. Calyx 2-3 mm. Corolla purple-red, red, to pale lilac outside, white inside, 1-2.2 cm; tube funnelform, 0.8-1.5(-2) cm; lobes ovate to ovate-oblong, spreading or usually upright. Anthers yellow, inserted to 2 mm from mouth of corolla tube or somewhat protruding. Capsule ripening usually reflexed, long elliptic, 1-1.5(-2) cm, smooth or sparsely lenticellate.
* Thickets, woods, near rivers and gullies; 1000-3400 m. S Gansu, W Hubei, S Shaanxi, Sichuan, N Yunnan