. T. 



raucisco, 



'n 1 and College E <1 i f i o n^ 



M A. 1ST TJ A. L 



BOTANY 



NORTHERN UNITED STATES 



REVISED EDITION; 



INCLUDING 



VIRGINIA, KENTUCKY, AND ALL EAST OF THE MISSISSIPPI ; 



ARRANGED 



ACCORDING TO THE NATURAL SYSTEM. 



BY ASA GRAY, 



FISHER PROFESSOR OF NATURAL HISTORY IN HARVARD UNIVERSITY. 



ILLUSTRATING THE GENER/V OF FERNS, ETU 



NEW YOKK: 

 IVISO^ & PIIINNKY, 48 & 50 WALKER ST. 



CHICAGO: S. C. GRIGGS & CO., 39 & 41 LAKE ST. 



CINCINNATI : MOORK, WII.STACH, KEYS A CO. ST. LOUI8 : KKITH & WOOO8. 



PUILADKLl'HIA : SOWER, BARNKS A CO. BUFFALO: PUINNEY k CO. 



NEWBORO: T. 8. QUACKENBU6H. 



1859. 



