IOWA 



GEOLOGICAL SURVEY 



Bulletin No. 4 



THE WEED FLORA 



OF IOWA 



L1BRARV 



NEW Y«RK 

 BOTANICAL 

 <]AKL>. 



GEORGE F. KAY, State Geologist 

 JAMES H. LEES, Assistant State Geologist 



DES MOINES: 



Published for Iowa Geological Survey 



1913 



