PBEFACE. 7 



country, but in the majority of cases they occur over the 

 greater part of the United States and Europe. 



Below are given the names of the authorities from which 

 this book is compiled. Very often characters have been 

 copied verbatim, and in no ease have quotation marks been 

 used. 



Manual of the Mosses of North America, by Leo Les- 

 quereux and Thomas P. James. Boston, 1884. 



Descriptive Catalogue of the North American IIepatica3 

 North of Mexico, by Lueien M. Underwood. Illinois, 1883. 



Marine Algae of New England and Adjacent Coast, by 

 W. G. Farlow. Washington, 1881. 



Die Pilze Deutschlands. Oesterreichs und der Schweiz. 

 Georg Winter. Leipzig, 1884. 



A Synopsis of the North American Lichens, by Edward 

 Tuekerman. Boston, 1882. 



Handbuch der Systematischen Botanik. Chr. Luerssen. 

 Leipzig, 1879. 



The student is recommended to consult these works for 

 further information regarding their respective groups. 

 The bibliographical references to be found in these works 

 will lead a student to original authorities. Students will 

 find the illustrations in Bessey's Botany or Saehs's Text- 

 book frequently of service in connection with the glossary 

 of this book. 



The book is bound with blank interleaves for the con- 

 venience of students wishing to insert notes and sketches. 



Cambridge, Mass., June, 1886. 



