ILLINOIS GEOLOGICAL 

 SURVEY U8RARY 



G&v 



^/f 



STATE OF ILLINOIS 



DEPARTMENT OF REGISTRATION AND EDUCATION 



An Early Pennsylvanian Flora with 

 Megalopteris and Noeggerathiales 

 from West-Central Illinois 



Richard L Leary 

 Hermann W. Pfefferkorn 



Prepared in cooperation with the 

 Illinois State Museum, Springfield 



ILLINOIS STATE 



Jack A. Simon, Chief 



CIRCULAR 500 



GEOLOGICAL SURVEY 



Urbana, IL 51801 

 1977 



