HOW 

 TO KNOW THE MOSSES 



A POPULAR GUIDE TO THE MOSSES 



OF THE 

 NORTHEASTERN UNITED STATES 



Containing keys to eighty genera 



and short descriptions of over one hundred and 



Jifty species with special reference to tJie 



disti}2gnishing characteristics tJiat are 



apparent zvithout tJie aid of a le?is 



BY 



ELIZABETH MARIE DUNHAM 



MEMBER OF THE SULLIVANT MOSS SOCIETY 



With Illustrations by 

 the Author 



BOSTON AND NEW YORK 

 HOUGHTON MIFFLIN COMPANY 



