Rhododendron kiusianum ( Miyama Komachi Kyushu Azalea )
Dense , twiglike , dwarf , semi - evergreen shrub that is aboriginal to the mountaintops of Kyushu Island , Japan . R. kiusianum has also been known as R. indicum amoenum and R. obtusum f. japonicum . Hardy to 0 degrees F. Leaves are little , obovate , dark green , 1/4 to 3/4 column inch long . Flowers are small , carry in trusses of 2 to 3 per clustering , and pay from mid to previous spring ....