墨脱杜鹃 mo tuo du juan

Rhododendron mollyanum Cowan & Davidian, Rhododendron Year Book 8: 72. 1953, not R. mollianum Koorders (1909).

Trees 12–15 m tall; shoots stout, ca. 12 mm in diam., thinly gray-tomentose. Petiole stout, 20–40 mm, silvery-gray arachnoid-tomentose or glabrescent; leaf blade thickly leathery, oblanceolate to oblong, 20–30 × 5.5–10 cm; base rounded or broadly cuneate; apex rounded and mucronate; abaxial surface indumentum silvery-white, thin, compacted; adaxial surface glabrous; midrib and lateral veins prominent abaxially. Inflorescence racemose-umbellate, 15–20-flowered; rachis ca. 30 mm, floccose. Pedicel 3–5 cm, densely tawny-tomentose; calyx teeth 8, ca. 1 mm, minute, tomentose; corolla ventricose-campanulate, pink with crimson blotch at base, ca. 5 cm, lobes 8, emarginate; stamens 16, unequal, filaments glabrous; ovary 8–9 mm, densely rufous-tomentose; style slightly shorter than corolla, but longer than stamens, glabrous; stigma discoid.

Open montane forests; 2800–2900 m. S Xizang.