Rhododendron coryanum Tagg & Forrest

Shrubs, ca. 3–6 m tall; branchlets brownish, ca. 4 mm in diam., grayish pubescent. Petiole cylindric, grooved adaxially, 15–20 mm, thinly tomentose, with a few short glandular hairs; leaf blade leathery, long-elliptic to oblong-lanceolate, 7–14 × 2–3 cm; base tapering, cuneate; apex acute to acuminate; abaxial surface indumentum thin, silvery grayish or whitish, soft and suedelike, also with sparsely scattered very small glands; adaxial surface green, glabrous; midrib prominent abaxially, grooved adaxially, lateral veins 15–20-paired, slightly impressed adaxially. Inflorescence 15–20-flowered; rachis 20–30 mm, puberulent. Pedicel 3–4 cm, sparsely tomentose and glandular; calyx lobes 5, ca. 2 mm, ovate or triangular, sparsely tomentose; corolla funnel-campanulate, creamy-white or whitish with brownish crimson spots, 2.5–3 cm, puberulent inside; lobes 5, orbicular, ca. 1.5 cm; stamens 10, unequal, 2–2.5 cm, filaments puberulent at lower part; ovary conoid, ca. 5 mm, glabrous; style 2–2.5 cm, slender. Capsule cylindric, slightly curved, 15–25 × 4–6 mm, glabrous. Fl. Jun, fr. Aug–Oct.

SE Xizang, NW Yunnan.

Abies forests, Rhododendron thickets; 2600–3700 m.

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

Rhododendron coryanum là một loài thực vật có hoa trong họ Thạch nam. Loài này được Tagg & Forrest miêu tả khoa học đầu tiên năm 1926.

光蕊杜鹃（学名：Rhododendron coryanum）为杜鹃花科杜鹃属下的一个种。