Koichiro WadaRhododendron yakushimanum (degronianum) ssp. yakushimanum 'Koichiro Wada'. This somewhat rare rhododendron comes from one island in Japan, Yakushima Island. In the 1930's, a Japanese nurseryman by the name of Koichiro Wada sent his finest selection of this species to Lionel de Rothchild in England. Mr. Rothchild of Exbury in Cornwall was the most knowledgeable rhododendron expert at that time. The plant has very shiny dark green leaves that curve