OUR ? .: JV 0f 



NATIVE ? F -f 



AND 



THEIR ALLIES 



WITH 



Synoptical Descriptions of tbe American 

 Pteridopbyta North of Mexico 



LUCIEN MARCUS UNDERWOOD 



l\ 



FIFTH EDITION, REVISED 



NEW YORK 



HENRY HOLT AND COMPANY 

 1896 



