Rhododendron adenogynum Diels

Shrubs, 1–2.5 m tall; branchlets stout, with gray woolly tomentum when young, sometimes mixed with glands, occasionally glabrous. Petiole 10–15 mm, tomentose and shortly glandular-hairy, sometimes almost glabrous; leaf blade thickly leathery, lanceolate to oblong-lanceolate, 6–12 × 2–4 cm; base rounded or ± cordate; apex acute or acuminate; abaxial surface indumentum tawny to cinnamon, dense, thickly spongy, hairs sometimes mixed with glands; adaxial surface dark green, glabrous. Inflorescence racemose-umbellate, 8–12-flowered; rachis ca. 10 mm, tomentose. Pedicel 1.5–3 cm, densely tomentose and short-glandular-hairy; calyx yellow-green, deeply lobed; lobes 5, 10–15 mm, oblong, with short glandular hairs throughout on outer surface and margin; corolla campanulate, white flushed pink to pink, with crimson spots on corolla-tube and on upper lobes, 3.5–4.5 cm, inner surface puberulent, lobes 5; stamens 10, unequal, filaments densely puberulent and glandular-hairy in lower half; ovary ca. 5 mm, densely shortly glandular-hairy; style ca. 3.2 cm, shortly glandular-hairy on lower part; stigma discoid. Capsule oblong-cylindric, straight, 15–20 × 6–7 mm, calyx persistent. Fl. May–Jul, fr. Aug–Nov.

SW Sichuan, SE Xizang, NW Yunnan.

Abies forests, Rhododendron thickets, mountain slopes; 3200–4200 m.

Rhododendron adenogynum (腺房杜鹃) is a species of flowering plant in the heath family Ericaceae, native to southwest Sichuan, southeast Xizang, and northwest Yunnan in China, where it grows at altitudes of 3,200–4,200 m (10,500–13,800 ft). This evergreen shrub grows to 1–2 m (3.3–6.6 ft) in height, with leathery leaves that are lanceolate to oblong-lanceolate, 6–12 by 2–4 cm in size. The flowers are white to pink, with crimson spots.

Though hardy, it is rarely seen in cultivation outside of specialist collections.