IV PREFACE. 



selected in illustration, as would be generally 

 known, or could be readily described. * * 

 Much assistance has been derived in the 

 preparation of these pages from the works of 

 of M. Meyen, Dr. Lindley, Mrs. Somerville^ 

 and Dr. Carpenter ; and to the works of the 

 first of these authors and of baron Humboldt, 

 the reader who desires further information 

 is directed. Mr. H. C. Watson's " Cybele 

 Brittanica" will also afford much instruction 

 in regard to the geographical distribution of 

 British plants. 



