TO 
WILLIAM WILSON SAUNDERS, F.R.S., 
TREASURER AND VICE-PRESIDENT OF THE LINNEAN SOCIETY, 
| A GENTLEMAN NO LESS DISTINGUISHED FOR HIS SCIENTIFIC ACQUIREMENTS 
THAN FOR HIS 
LIBERAL ENCOURAGEMENT OF MANY BRANCHES OF SCIENCE; 
AND TO WHOM 
HORTICULTURE AND THE ROYAL GARDENS OF KEW ARE UNDER SPECIAL 
OBLIGATIONS, 
This Volume is Dedicated, 
s BY 
HIS SINCERE FRIEND, 
‘ JOS. D. HOOKER. 
Royat GARDENS, Kew, 
December 1, 1866. 
