Description from Flora of China
Azalea schlippenbachii (Maximowicz) Kuntze.
Shrubs, deciduous, 1–4.5 m tall; young shoots densely glandular-hairy. Petiole 2–4 mm, setose or glandular-hairy; leaf blade papery, obovate or broadly obovate, 4.5–7.5 × 2.5–4.5 cm; abaxial surface glandular-setose along midrib; adaxial surface sparsely glandular-hairy and puberulent. Inflorescence terminal, umbellate, 3–6-flowered: flowers appearing before or with the leaves. Pedicel ca. 1.2 cm, densely glandular-hairy; calyx lobes ovate-elliptic, 1.5–7 mm, outer surface and margin glandular hairy; corolla rotate-funnelform, white to pink or rose, the upper 3 lobes with red-brown flecks, 2.7–3.2 cm; tube ca. 9 mm, outer surface puberulent; lobes 5, broadly obovate; stamens 10, unequal, partly exserted, filaments flat, puberulent below the middle; ovary ovoid, densely glandular-hairy; style longer than stamens, shortly glandular-hairy below. Capsule long-ovoid, dark brown, to 17 mm, densely glandular-hairy. Fl. May, fr. Jun–Sep.
Broad-leaved forests, thickets; 400–1500 m. S Liaoning, Nei Mongol [Japan, Korea, E Russia].