Rhododendron occidentale ( Wallowa Western Azalea )
The Occidentale Hybrids are the product mainly of R. occidentale , the Western Azalea native to the Pacific Coast . This species and its cultivar are rarely successful in the eastern U.S. , but are an excellent choice for a West Coast garden . Tall , vertical , deciduous bush that is cold hardy down to -12 grade F. Leaves are elliptic to oblong , shiny , medium super C , 1 1/4 to 3 1/2 inch long ....