Rhododendron callimorphum I. B. Balf. & W. W. Sm.

Shrubs, ca. 3 m tall; older shoots grayish white, bark flaking; young shoots with short glandular hairs, smooth later. Petiole terete, 10–25 mm, sparsely glandular; leaf blade leathery to thickly leathery, broadly ovate or suborbicular, 4–7 × 3–4 cm; base truncate or subcordate; apex rounded, apiculate; abaxial surface greenish, glabrous; adaxial surface dark green, glabrous; midrib raised abaxially, impressed adaxially; lateral veins 9–14-paired, inconspicuous on both surfaces. Inflorescence racemose-umbellate, 5–7-flowered; rachis 2–5 mm, glandular. Pedicel 1–2.5 cm, densely glandular; calyx lobes 5, 1–3 mm, ovate or triangular, margin glandular; corolla funnelform-campanulate, white or pink, 3–4 cm, lobes 5, suborbicular, 1–1.5 × 1.5–2 cm, apex emarginate; stamens 10, unequal, 1.5–2.5 cm; filaments slender, glabrous; anthers ovate, ca. 2 mm; ovary cylindric, 5-lobed at maturity, 10–15 mm, glands persistent; style 1.5–2 cm. Fl. May–Jun, fr. Aug–Sep.

W Yunnan [NE Myanmar].

Thickets, mountain slopes; 3000–4000 m.