NEW ENGLAND FERNS 



AND 



THEIR COMMON ALLIES 



AN EASY METHOD OF 

 DETERMINING THE SPECIES 



BY 



HELEN E;ASTMAN 



ILLUSTRATED 



BOSTON AND NEW YORK 



HOUGHTON, MIFFLIN AND COMPANY 



(3tf)e JFliber^ibE pcc?iS, ■JTambtidBe 



I 904 



