大白杜鹃(原亚种) da bai du juan (yuan ya zhong)

Rhododendron albicaule H. Léveillé; R. franchetianum H. Léveillé; R. giraudiasii H. Léveillé; R. spooneri Hemsley & E. H. Wilson.

Petiole 17–23 mm; leaf blade oblong to oblong-obovate, 5–14.5 × 3–5.7 cm; base rounded. Corolla 3–5 × 5–7 cm, lobes 6–8, emarginate; stigma 3–5(–6.5) mm in diam. Fl. Apr–Jun, fr. Sep–Oct.

Forests, thickets; 1000–3300 m. W Guizhou, SW Sichuan, SE Xizang, NW Yunnan [NE Myanmar].