STATE OF ILLINOIS 



DEPARTMENT OF REGISTRATION AND EDUCATION 



A. M.SH ELTON, Director 



DIVISION OF THE 

 STATE GEOLOGICAL SURVEY 



M. M. LEIGHTON, Chief 



BULLETIN No. 52 



PENNSYLVANIAN FLORA OF NORTHERN 

 ILLINOIS 



BY 



A. C. NOE 



PRINTED BY AUTHORITY OF THE STATE OF ILLINOIS 



URBANA, ILLINOIS 



1925 



