Description from Flora of China
Rhododendron rubropilosum Hayata var. breviperulatum (Hayata) T. Yamazaki.
Small much-branched shrubs, 1–3 m tall; shoots fine, coarsely shiny-brown-strigose, hairs flat. Petiole 3–7 mm; leaf blade papery, ovate-elliptic to oblong-obovate, 2–3 × 1–1.5 cm; base narrowly cuneate; margin entire; apex obtuse and mucronate; abaxial surface midrib densely coarsely scurfy-strigose; adaxial surface strigose. Inflorescence 3–6-flowered. Pedicel 0.4–0.6 cm, densely long-setose; calyx lobes membranous, ovate or subrounded, small, ca. 1.5 mm, margin ciliate; corolla broadly funnelform, rose-pink, with crimson flecks on upper lobes, ca. 2.5 cm, lobes deeply cut, oblong, apex obtuse; stamens 5, unequal, shorter than corolla; filaments flat, glabrous or sparsely puberulent at base; conical ovary and base of style coarsely strigose. Capsule conical, ca. 11 × 5 mm, pubescent.
Mountain forests. Taiwan (E and N coasts).