EDITORIAL NOTE vii 
where the Arboretum has established large collections of the new 
Rhododendrons and other Chinese plants. 
No man, perhaps, has discovered more new plants than Wilson, 
or made larger and more interesting contributions to gardens; and 
his specimens on which this work is based now found in the principal 
herbaria of the United States and Europe, and his plants now growing 
in many gardens are witnesses to his zeal, industry and success as a 
botanical traveler. 
C. S. SARGENT. 
DECEMBER, 1916. 
