Rhododendron kaempferi ( Little Ruby Torch Azalea )
Rhododendron kaempferi , or torch azalea , is a cold - hardy , semi - evergreen bush , usually tall and liberal . The Kaempferi hybrid were bred from R. kaempferi as well as R. ‘ Malvatica ’ and R. “ Maxwelli . ’ Leaves are glossy , fishgig - mold to ovate , 1 1/2 to 2 in long . peak are borne in showy truss of 2 to 4 per cluster ....