PUBLICATIONS OF THE ARNOLD ARBORETUM, No. 9 



A 



MONOGRAPH OF AZALEAS 



RHODODENDRON SUBGENUS 

 ANTHODENDRON 



BY 



ERNEST HENRY WILSON 



AND 



ALFRED REHDER 



ISSUED APRIL 15, 1921 



PRINTED FROM THE INCOME OF THE WILLIAM L. BRADLEY FUND 



THE UNIVERSITY PRESS 



CAMBRIDGE 

 1921 



