Rhododendron arizelum I. B. Balf. & Forrest

Rhododendron arizelum var. rubicosum Cowan & Davidian (Rhododendron Year book 8: 79. 1953), described from NW Yunnan, is a rich red- to purple-flowered form, which may be intermediate between R. arizelum and R. rex subsp. fictolacteum.

Shrubs or small trees, 3–7 m tall; branchlets stout, rough, usually ca. 10 mm in diam.; young shoots pale brown tomentose, glabrescent. Petiole terete, 20–30 mm, tomentose, glabrescent; leaf blade leathery, obovate or obovate-elliptic, broadest above middle of blade, 9–19 × 4–8 cm; base cuneate; apex rounded, emarginate; abaxial surface with pale brown or rufous, 2-layered indumentum, upper layer brown, hairs narrowly cup-shaped, strongly fimbriate, lower layer thin, compacted, gray; adaxial surface deep green, glabrous, midrib prominent abaxially, flat or slightly impressed adaxially, lateral veins 10–13-paired, prominent abaxially. Inflorescence 15–20-flowered; rachis 15–25 mm, densely tomentose. Pedicel 1.2–2 cm, densely tomentose; calyx oblique; teeth 8, ca. 1 mm; corolla campanulate, white, pale yellow or pink, with crimson basal blotch, 3.5–4.5 cm, lobes 8, suborbicular, ca. 1 × 1.5 cm, emarginate; stamens 16, 1.5–2.5 cm, filaments glabrous or puberulent at base; ovary terete, densely tomentose; style glabrous. Capsule 30–40 × ca. 10 mm, tomentose. Fl. May–Jun, fr. Aug–Sep.

SE Xizang, W Yunnan [NE Myanmar].

Pinus forests, Rhododendron thickets; 2500–4000 m.

Rhododendron arizelum (夺目杜鹃) is a species of flowering plant in the family Ericaceae. It is native to northeastern Myanmar, southeastern Tibet, and western Yunnan, China, where it grows at altitudes of 2,500–4,000 m (8,200–13,100 ft). It is a shrub or small tree that typically grows to 3–7 m (9.8–23.0 ft) in height, with leathery leaves that are obovate or obovate-elliptic, and 9–19 × 4–8 cm in size. The flowers are white, pale yellow, or pink, with a crimson basal blotch.

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

Rhododendron arizelum là một loài thực vật có hoa trong họ Thạch nam. Loài này được Balf. f. & Forrest miêu tả khoa học đầu tiên năm 1920.

夺目杜鹃（学名：Rhododendron arizelum）为杜鹃花科杜鹃属下的一个种。