Vlll PREFACE. 



book throughout as " Hooker and Wilson," since the name 

 of Sir William still remains on the title-page, but it is to be 

 understood distinctly that the whole was prepared by Mr. 

 Wilson. The figures are from the pencil of Mr. Fitch, with 

 the exception of the magnified leaves, and the details of fruc- 

 tification, for which I am myself answerable. The Work 

 does not lay any claim to originality, but T have spared no 

 pains to make it accurate. My best thanks are due to Sir 

 W. J. Hooker for the assistance he has afforded, without 

 which the volume could not have appeared, and to other kind 

 friends who have helped me with specimens and information 

 during the course of its preparation. 



Zing's Clcfve, 

 May, 1863. 



