Rhododendron guizhouense M. Y. Fang

Shrubs or small trees, 4–7 m tall; branchlets slender, glabrous. Petiole cylindric, 10–15 mm, glabrous; leaf blade leathery, elliptic-lanceolate or ovate-lanceolate, 5–10 × 1.5–3.6 cm; base broadly cuneate or rounded; margin revolute; apex acuminate, oblique; both surfaces glabrous; midrib raised abaxially, grooved adaxially; lateral veins 10–12-paired, obscure. Inflorescence racemose-umbellate, 4–6-flowered; rachis ca. 5 mm, puberulent or glabrous. Pedicel 1–2 cm, sparsely glandular-hairy; calyx lobes 5, ca. 1 mm, glabrous; corolla openly campanulate or cup-shaped, creamy, with crimson basal blotch, 2.5–3 cm, lobes 5, suborbicular, ca. 1.5 × 1.7 cm, emarginate; stamens 10, unequal, 1–2 cm, filaments pubescent at base; ovary cylindric-conoid, 3–4 mm, densely hirsute-glandular; style ca. 2.5 cm, glabrous, stigma swollen. Capsule not known. Fl. Apr–May.

N Guangxi, E Guizhou, W Hunan.

Mixed forests; 1700–2400 m.