Description from Flora of China
Syringa adamiana I. B. Balfour & W. W. Smith; S. alborosea N. E. Brown; S. rehderiana C. K. Schneider; S. tomentella var. rehderiana (C. K. Schneider) Rehder; S. wilsonii C. K. Schneider.
Shrubs 1.5-7 m. Branchlets sparsely to densely pubescent. Petiole 0.8-1.5 cm, together with rachis, pedicel, and calyx pubescent, villous, or glabrescent; leaf blade ovate-lanceolate to elliptic-lanceolate, rarely ovate or obovate, 2.5-11 × 1.5-5 cm, adaxially appressed pubescent or glabrous, abaxially hairy as on branchlets or barbate along veins, base cuneate to subrounded, apex acute to acuminate. Panicles erect, terminal or sometimes lateral, loose, 10-25 × 4-12 cm. Pedicel 1-1.5 mm. Calyx 2.5-3 mm. Corolla lilac-red, pink, or white, 1-1.7 cm; tube slightly funnelform, 0.8-1.4 cm; lobes ovate to elliptic, spreading. Anthers yellow, reaching mouth of corolla tube or slightly protruding. Capsule oblong-elliptic, 1.2-2 cm, obviously lenticellate or smooth. Fl. Jun-Jul, fr. Sep. 2n = 46, 48.
* Woods on slopes, thickets of valley, along gullies; 2500-3500 m. W Sichuan