PREFACE. y 



This Manual of American Mosses is believed to include 

 descriptions of all the species of mosses (about nine hundred) 

 that are as yet known to occur on the North American Con- 

 tinent within the limits of the United States and northward. 

 It includes the results of the researches of Sullivant and myself, 

 continued until 1872, as well as those of James, Austin, and 

 Rau, and also such species as have been described by European 

 bryologists, Schimper, Mitten, Mueller, Hampe, Lindberg, etc. 



Leo Lesquekeus. 

 Columbus, Ohio, May, 1884. 



