Rhododendron eurysiphon Tagg & Forrest

Shrubs, 1–2 m tall; older branches greenish, glabrescent; branchlets slender, 2–3 mm in diam. below inflorescence, shortly glandular-hairy. Petiole 5–6 mm, glandular; leaf blade leathery, long-elliptic or oblong, 3–5.5 × 1.5–2.5 cm; base rounded; apex rounded, apiculate; both surfaces glabrous; midrib prominent and raised abaxially, flat adaxially; lateral nerves obscure on both surfaces. Inflorescence racemose-umbellate, 3–5-flowered; rachis 3–5 mm, tomentose. Pedicel 1–2 cm, sparsely glandular-hairy; calyx cupular; lobes 5, 3–4 mm; outer surface sparsely glandular-hairy; corolla campanulate, creamy white to pale rose, with crimson flecks, 3.5–4 cm, base with nectar pouches; lobes 5, suborbicular, ca. 1.5 × 2 cm, emarginate; stamens 10, unequal, 1.3–3 cm, filaments stout, pubescent at base; ovary ovoid, ca. 5 mm, densely glandular; style glabrous. Capsule oblong, slightly curved, 15–20 × ca. 6 mm, base enclosed by persistent calyx.

SE Xizang.

Rhododendron thickets, scrub, stony slopes; ca. 4000 m.

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

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

宽筒杜鹃（学名：Rhododendron eurysiphon）为杜鹃花科杜鹃属下的一个种。