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.