iv PREFACE. 



exists in their nomenclature. The trade lists, too, with some 

 praiseworthy exceptions, abound with numerous aliases, as 

 may be seen by a slight comparison of such lists with the 

 ample indexes given at the end of the volume, where all the 

 synonyms are printed in Italics. 



Amongst the additional species and varieties recorded in the 

 present Supplement, will be found several which have" not 

 before been enumerated, together with other information of a 

 recent date, particularly the identification and correction of M. 

 RoezTs Mexican Pines; and the notification of some errors of 

 long standing in books of authority ; the whole being completed 

 with an Index, containing all the systematic names to be found 

 in the present Supplement, which amount to upwards of 580. 



In conclusion, the Author desires to express his thanks to 

 those noblemen and gentlemen who have so liberally furnished 

 him with materials for examination, and, at the same time, in- 

 formed him of the sources whence they received their plants, 

 thus enabling him to direct his attention to such establishments 

 as were most worthy of notice, not only for the great extent of 

 their collections, but for general accuracy in nomenclature. 



He also wishes to express his obligations to Mr. John Stan- 

 dish, of the Ascot Nursery ; Messrs. Osborn, of Fulham ; Mr. 

 Robert Glendinning, of Chiswick ; Mr. William Paul, of Walt- 

 ham Cross ; Mr. William Wood, of Maresfield ; Mr. Alexander 

 Dancer, of Fulham; Mr. Richard Smith, of Worcester, and 

 Messrs. Rollison, of Tooting, for useful information and speci- 

 mens sent for examination. 



