Rhododendron kaempferi ( Zampa Kaempferi Hybrid Azalea )
Rhododendron kaempferi , or Aaron’s rod azalea , is a cold - hardy , semi - evergreen shrub , commonly marvellous and tolerant . The Kaempferi hybrids were cover from R. kaempferi as well as R. ‘ Malvatica ’ and R. “ Maxwelli . ’ foliage are calendered , fizgig - shaped to ovate , 1 1/2 to 2 inches long . flower are borne in showy truss of 2 to 4 per clump ....