PREFACE. ill 
he is indebted for advice and assistance in this undertaking ; 
among whom may be named Professor Banrneron, Mr. Baker, 
Mr. A. G. More, and Mr. Hewerr C. Watson; but his thanks 
are especially due to the Rey. W. W. Newsou.p, who has assistec 
him not only with the loan of many valuable books which could 
not otherwise have been consulted, but also with the results of 
his long and extensive study of critical plants and synonyms. 
The arrangement and limitations of the natural orders and 
genera will be mainly taken from Bentham and _ Tooker’s 
newly-published “Genera Plantarum,” in so far as that valuable 
work is available. 
It is deemed unnecessary to give references to botanical works 
under each species, unless they afford additional information, or 
when a species has been described by some recent author under 
a different name from that which is adopted in the text. 
A list of the abbreviations of the names of the authors quoted 
must be postponed until the conclusion of the work. 
The accentuation of the scientific names of the plants described 
will be marked in the Index. 
