PENNSYLVANIAN FLORA OF NORTHERN ILLINOIS 



By A. C. Nee 



OUTLINE 

 Part I 



PAGE 



Introduction 9 



General statement 9 



Location and brief description of localities 9 



Collections 10 



Historical review 10 



Method of determination 11 



Organization of the material 1 1 



Acknowledgments 12 



Identification of fossil plants 12 



Definition of a fossil plant species 12 



List of figured species 13 



Discussion of figured orders and genera 15 



Equisetales 15 



Sphenophyllales 16 



Lycopodiales 16 



Filicales 16 



Cycadofilicales 18 



Cordaitales 18 



Part II 



Explanation of Plates I-XLV 19 



