ADVERTISEMENT. 



IT is incumbent on the Publisher to shew in what respects 

 the present Edition has a better claim to public favour than 

 any of the former. 



Every Edition of this Work, for these last thirty years. 

 Las been servilely copied from the Second Edition ; not- 

 withstanding the great improvement which the science of 

 Botany has received during that period by the accession of 

 new Genera, and the different arrangement of the Orders, 

 in every Class, and their subdivisions. These, in this Edi- 

 tion have been carefully attended to, and it is hoped, ac- 

 curately inserted. 



In the Appendix, instead of the Generic name only, the 

 trivial name in many of the species lias been added, and 

 a great number of new English names, chiefly of West In- 

 dia plants given, for which the Editor is indebted to a 

 very eminent Botanist. A few errors that had maintain- 

 ed their places in all the former Editions, have also been 

 carefully corrected, and some improvements occasionally 

 introduced into the text, which it would be tedious to spe- 

 cify here. 



