TEXT-BOOK OF 



PASTORAL AND 

 AGRICULTURAL BOTANY 



THE STUDY OF THE 

 INJURIOUS AND USEFUL PLANTS 

 OF COUNTRY AND FARM 



BY 



JOHN W. HARSHBERGER, PH.D. 



PROFESSOR OK BOTANY, UNIVERSITY OF PENNSYLVANIA; FORMER LECTURER FARMERS' INSTITUTES 



NEW YORK; PRESIDENT OF THE PHILADELPHIA NATURAL 

 HISTORY SOCIETY, PHILADELPHIA, I92O. 



WITH 121 ILLUSTRATIONS 



PHILADELPHIA 



P. BLAKISTON'S SON & CO. 



1012 WALNUT STREET 



