PUBLICATIONS OF THE ARNOLD ARBORETUM, No. 9 



A 



MONOGRAPH OF AZALEAS 



RHODODENDRON SUBGENUS 

 ANTHODENDRON 



BY 



ERNEST HENRY WILSON 



AND 

 ALFRED REHDER 



ISSUED APEIL 15, 1921 



Printed from the Income op the William L. Bradley Fund 



BY 



THE UNIVERSITY PRESS 



CAMBRIDGE 



1921 



