TO 
JOHN PARKINSON, ESQ., F.R.& L.S., 
H. B. M. CONSUL-GENERAL IN MEXICO, 
&. &. &c., 
TO WHOM, 
THE MORE RECENT PAGES OF THIS WORK ARE INDEBTED FOR 
SOME OF THEIR BRIGHTEST ORNAMENTS, 
AND, 
TO WHOSE UNWEARIED EXERTIONS IN THE CAUSE OF BOTANY, 
DURING HIS RESIDENCE IN MEXICO, 
THE COLLECTIONS OF ORCHIDEZ AND CACTEA:, 
IN THE GARDENS 
OF HIS GRACE THE LATE DUKE OF BEDFORD AT WOBURN, AND OF 
MR. HARRIS AT KINGSBURY, 
OWE THEIR MOST POWERFUL ATTRACTIONS, 
AND 
OUR HERBARIA MANY NOVEL AND INTERESTING SPECIMENS, 
THE PRESENT VOLUME IS DEDICATED, 
BY HIS OBEDIENT AND VERY 
HUMBLE SERVANT, 
W. J. HOOKER. 
Giascow, April 1, 1840. 
