Rhododendron hyperythrum (California, USA)

Rhododendron hyperythrum Hayata, Icon. Pl. Formosan. 3: 133–134 1913. ; 
Rhododendron hyperythrum Hayata
A shrub with oblong-lanceolate to elliptic-lanceolate up to 10 cm long leaves, with brownish dots beneath, with white flowers having funnel-shaped corolla and stamens with densely hairy filaments.
A plant from Taiwan, Photographed at SFO Botanical Garden in California.