Rhododendron formosanum Hemsl.

Shrubs or small trees, 2–6 m tall; branchlets ca. 4 mm in diam. below inflorescence. Petiole 10–20 mm, with a floccose indumentum; leaf blade thickly leathery, narrowly lanceolate or oblanceolate, base cuneate; margin slightly reflexed; apex obtuse; abaxial surface indumentum brown, compact; adaxial surface glabrous, midrib impressed, prominent adaxially; lateral veins 13–17 on each side, inconspicuous on both surfaces. Inflorescence racemose-umbellate, 10–20-flowered; rachis 15–20 mm, brownish pilose. Pedicel stout, 2–3 cm, rufous-brown pubescent; calyx teeth 5, ca. 1 mm, broadly rounded or triangular, puberulent outside; corolla widely funnelform, white or pink, with purple flecks, 4–4.5 cm, glabrous; lobes 5, rounded, ca. 2 cm, emarginate; stamens 10–12, unequal, 2–3 cm, filaments pubescent at base; ovary ovoid or cylindric, ca. 14 mm, densely rufous-tomentose; style 2–3 cm, glabrous. Capsule cylindric, ca. 10 × 4 mm, brownish tomentose. Fl. Apr, fr. Jul–Aug.

S Taiwan.

Broad-leaved forests; 800–2300 m.

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

Rhododendron formosanum là một loài thực vật có hoa trong họ Thạch nam. Loài này được Hemsl. miêu tả khoa học đầu tiên năm 1895.

台湾杜鹃（学名：Rhododendron formosanum），为杜鹃花科杜鹃属下的一个植物种。