Rhododendron exasperatum Tagg

Shrubs or small trees, 2–5 m tall; young shoots ca. 7 mm in diam. below inflorescence, densely glandular-setose. Petiole short and stout, 10–15 mm, usually setose, occasionally without setae; leaf blade leathery, broadly ovate or subobovate, 10–18 × 4–10 cm; base rounded; margin with caducous setae; apex rounded, acuminate; abaxial surface greenish, sparse brownish glandular-hairy, midrib setose, mainly at base; adaxial surface deep green, nearly smooth, with scattered setae, base of midrib with or without brownish setae; midrib narrow, raised abaxially, impressed adaxially; lateral veins 12–15-paired, slightly raised abaxially, slightly impressed adaxially, net veins inconspicuous. Inflorescence densely umbellate, 10–15-flowered; rachis ca. 5 mm. Pedicel 1(–1.5) cm, slightly glandular; calyx lobes 5, 4–5 mm, subovate, glabrous; corolla tubular-campanulate, fleshy, deep red, 3.5–4.5 × ca. 3.5 cm, with small deep red nectar pouches at base, glabrous inside; lobes 5, slightly unequal, ca. 1 × 1.8 cm, apex emarginate; stamens 10, unequal, 1.3–2.2 cm, filaments glabrous; anthers oblong, brown, 1.6–2 × 1–1.2 mm; ovary broadly cone-shaped, apex truncate, ca. 6 × 3 mm, densely glandular-hairy; style slender, ca. 2.2 cm, glabrous, stigma flattened, truncate, ca. 1 mm wide. Young fruits with dense persistent hair bases; calyx persistent.

SE Xizang [India, Myanmar].

Abies forests, Rhododendron thickets; 3000–3600 m.

Rhododendron exasperatum adalah spesies tumbuhan yang tergolong ke dalam famili Ericaceae. Spesies ini juga merupakan bagian dari ordo Ericales. Spesies Rhododendron exasperatum sendiri merupakan bagian dari genus Rhododendron.

Rhododendron exasperatum là một loài thực vật có hoa trong họ Thạch nam. Loài này được Tagg miêu tả khoa học đầu tiên năm 1930.

粗糙叶杜鹃（学名：Rhododendron exasperatum）为杜鹃花科杜鹃属下的一个种。