ADVERTISEMENT. 



The complete edition of the Manual op the Botany of 

 THE Northern United States includes the two great Cryp-^ 

 togamous Families of -Mosses and liverworts (from p. 607 to p. 

 704), written by Mr. SuUivant, and illustrated' with eight copper- 

 plates, crowded with admirable figures. Important as this part is 

 to the Botanist and the advanced student, it is much too difficult 

 for the beginner, and for common instruction in Botany in schools 

 and academies, which will begin with the Phsenogamous or Flower- 

 ing Plants, and will rarely extend into the Flowerless Plants beyond 

 the Ferns and Gluh-Mosses. As it adds considerably to the size and 

 expense of the book, the part here mentioned is omitted in this 

 Abridged Impression, which is intended especially for the use of 

 classes, and is affijrded by the publishers at a price so reduced as 

 to bring the work within the reach of all students. 



The six plates which illustrate the Ferns and their allies (and 

 which are numbered from IX to XIV) are also given ; so that 

 this edition is illustrated like the other, so far as it goes, and 

 nothing is omitted which ordinary students will require, at least 

 until they have become expert Botanists. It will be seen by the 

 paging, that the omitted matter immediately precedes and follows 

 the Index. 



Some additions and corrections are given on the following pages. 



