狭叶马缨杜鹃 xia ye ma ying du juan

Rhododendron peramoenum I. B. Balfour & Forrest, Notes Roy. Bot. Gard. Edinburgh 13: 56. 1920; R. arboreum var. peramoenum (I. B. Balfour & Forrest) D. F. Chamberlain.

Leaf blade very narrowly lanceolate, 7.5–9.5(–15) × 1–2 cm; apex acute to shortly cuspidate; abaxial surface indumentum gray to fawn, somewhat thin, compact, persistent; adaxial surface much less rugose. Corolla ca. 5 cm; style glabrous.

Mixed forests, evergreen broad-leaved forests, forest margins, thickets; 1700–3200 m. W Guizhou, SE Xizang, W Yunnan [NE India, Myanmar].