MANUAL 



OF 





THE FLORA 



OF THE 



NORTHERN STATES AND CANADA 



BY 



NATHANIEL LORD BRITTON, PH.D. 



Director-in-Chief of the New York Botanical Garden ; 



Emeritus Professor of Botany in Columbia 



University ; Vice- President of the New 



York A cademy of Sciences 



NEW YORK 



HENRY HOLT AND COMPANY 

 1901 



