Rhododendron unciferum P. C. Tam

Shrubs; branches cylindric, subverticillate, densely coarsely ferruginous strigose, later subglabrous. Spring and summer leaves possibly dimorphic. Petiole 2–3 mm, ferruginous strigose, hairs flat; leaf blade ovate or elliptic-ovate, usually 1.5–2.5(–3.2) × 1–1.7 cm; base broadly cuneate to subrounded; margin revolute and finely crenate; apex acute; abaxial surface sparsely strigose; adaxial surface glabrous except for midrib. Inflorescence 7–12-flowered. Pedicel 0.2–0.3 cm, densely ferruginous-strigose; calyx lobes broadly oblong or oblong-triangular, small, ca. 2.5 mm, densely coarsely strigose; corolla funnelform, reddish purple, without purple flecks, 1.2–1.3 × ca. 0.8 cm; tube 6–7 × ca. 2 mm, glabrous; lobes long-ovate, glabrous; stamens 5, unequal, 1.3–1.7 cm, filaments glabrous. Fl. Apr–May.

S Guangxi.

Rocks on hill summits; 700–800 m.