MAN UAL 



THE BOTANY 



THE NORTHERN UNITED STATES. 



INCLUDING THE DISTRICT EAST OF THE MISSISSIPPI AND 

 NORTH OF NORTH CAROLINA AND TENNESSEE, 



ARRANGED ACCORDING TO THE NATURAL SYSTEM." 



By ASA GRAY, 



FISHKR PROFESSOR OF NATURAL HISTORY IN HARVARD UNIVERSITY. 



JJfftt) HDftion. 



EIGHTH ISSUE. 



WITH TWENTY PLATES, 



ILLUSTRATING THE SEDGES, GRASSES, FERNS, ETC. 



IVISON, BLAKEMAN, TATLOR & CO 



NEW YORK AND CHICAGO. 



1877. 



