Rhododendron kiusianum ( Pink Clusters Kyushu Azalea )
heavy , twiglike , dwarf , semi - evergreen bush that is aboriginal to the mountaintops of Kyushu Island , Japan . R. kiusianum has also been bed as R. indicum amoenum and R. obtusum f. japonicum . Hardy to 0 degrees F. Leaves are small , obovate , dark green , 1/4 to 3/4 column inch long . Flowers are small , hold in truss of 2 to 3 per clustering , and borne from mid to late bound ....