IV PBEFACE. 



number of such terms, especially those of recent introduc- 

 tion, which did not appear in the former editions. 



In the use of this book I must urge that it is intended 

 to serve as a guide only to the teacher and student. The 

 student must actually see as much as possible of what is 

 here brought to his notice. The book simply marshals in 

 logical order the objects to be studied. No doubt some- 

 thing may be learned by a simple consecutive reading of 

 the paragraphs of the book, but the young botanist should 

 not be content to obtain all his facts at second hand; he 

 must see with his own eyes all that may be seen. 



Charles E. Bessey. 



University op Nebbaska, February 7, 1896. 



PEEFACE TO THE SEVENTH EDITION. 



A EEissuB having become necessary within a few 

 months from the appearance of this revision, advantage 

 is taken of the opportunity of making a few corrections 

 and additions. Attention is called to the change made 

 in paragraph 436, as to the systematic position of the 

 Quillworts. 



G, E. B. 



July 33, 1896. 



