马缨杜鹃(原变种) ma ying du juan (yuan bian zhong)

Rhododendron arboreum Smith subsp. delavayi (Franchet) D. F. Chamberlain; R. pilovittatum I. B. Balfour & W. W. Smith.

Leaf blade oblong-lanceolate to oblong-oblanceolate, 7–15 × 1.5–5 cm; apex obtuse or acute; abaxial surface indumentum white to fawn, spongy; adaxial surface rugose. Corolla style glabrous. Fl. May, fr. Dec.

Evergreen broad-leaved forests, thickets; 1200–3200 m. NW Guangxi, W Guizhou, SW Sichuan, Yunnan [Bhutan, NE India, Myanmar, Thailand, N Vietnam].