MANUAL 



OF 



TH E BOTANY 



OF THE 



NORTHERN UNITED STATES, 



INCLUDING THE DISTRICT EAST OF THE MISSISSIPPI AND 

 NORTH OP^ NORTH CAROLINA AND TENNESSEE. 



By ASA GRAY, 



LATE FISHER PROFESSOR OF NATURAL HISTORY IN HARVARD UNIVERSITY. 



Siitf) IStiition. 



REVISED AND EXTENDED WESTWARD TO THE 1 00th MERIDIAN, 



BY 



SERENO WATSON, 



CURATOR OF THE GRAY HERBARIUM, HARVARD UNIVERSXTy« 

 AND 



JOHN M. COULTER, 



PROFESSOR OF BOTANY IN WABASH COLLEGE, 



ASSISTED BY SPECIALISTS IN CERTAIN GROUPS. 

 WITH TWENTY-FIVE PLATES, 



ILLUSTRATING THE SEDGES, GRASSES, FERNS, ETC. 



NEW YORK • : • CINCINNATI • : • CHICAGO 



AMERICAN BOOK COMPANY 



FROM THE PRESS OF 



IvisoN, Blakeman & Company 



