TO 
DR. JOHN TORREY, 
THE DISTINGUISHED AUTHOR 
(IN CONJUNCTION WITH DR. ASA GRAY) 
OF 
THE FLORA OF NORTH AMERICA, 
Che Present GColume 
IS INSCRIBED, 
WITH SENTIMENTS OF GREAT REGARD AND AFFECTION, 
BY 
THE AUTHOR. 
RoyaL Garpens, Kew, 
Dec. Ist, 1850. 
