TEXT-BOOK OF 



PASTORAL AND 

 AGRICULTURAL BOTANY 



FOR THE STUDY OF THE 



INJURIOUS AND USEFUL PLANTS 



OF COUNTRY AND FARM 



BY 



JOHN W. HARSHBERGER, PH.D. 



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



OF THE STATE OF PENNSYLVANIA; IN CHARGE OF THE FIELD AND SYSTEMATIC BOTANY, 



MARINE BIOLOGICAL LABORATORY, COLD SPRING HARBOR, LONG ISLAND, 



NEW YORK; PRESIDENT OF THE PHILADELPHIA NATURAL 



HISTORY SOCIETY, PHILADELPHIA, Ip2O. 



l&oo 10 . 



9. $'. 93. 



WITH 121 ILLUSTRATIONS 



PHILADELPHIA 



P. BLAKISTON'S SON & CO. 



1012 WALNUT STREET 



