Rhododendron sphaeroblastum I. B. Balf. & Forrest

Shrubs, 1–3 m tall; young shoots and petioles glabrous. Petiole 15–30 mm; leaf blade thickly leathery, ovate to oblong-ovate or ovate-elliptic, 7–15 × 4–6.5 cm; base rounded or slightly cordate; apex obtuse or subrounded, mucronate; abaxial surface with indumentum 2-layered, upper layer rust-red to cinnamon, or deep rust-red, loose, woolly, persistent or detersile, lower layer compacted; adaxial surface glabrous. Inflorescence racemose-umbellate, 10–12-flowered; rachis 10–15 mm, glabrous. Pedicel 1–2 cm, glabrous; calyx lobes 5, 1–1.5 mm, unequal, triangular, acute, glabrous; corolla funnel-campanulate, or broadly campanulate, white, to pink or red to yellow, with carmine spots on corolla tube and upper lobes, 3.5–4.5 cm, lobes 5; stamens 10, unequal, filaments puberulent at base; ovary 5–6 mm, glabrous or sparsely floccose; style ca. 2 cm, glabrous. Capsule cylindric, slightly curved, 18–20 × 5–6 mm. Fl. May–Jun, fr. Aug–Oct.

SW Sichuan, N Yunnan.

Mixed forests, Abies forests, Rhododendron thickets, mountain slopes; 3300–4400 m.

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

Rhododendron sphaeroblastum 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.

宽叶杜鹃（学名：Rhododendron sphaeroblastum），为杜鹃花科杜鹃属下的一个植物变种。