CONTENTS 



PAGE 

 Introduction 1 



Flora and Vegetation 



Description of the Area 2 



Vegetational Divisions 4 



Systematic Treatment 



Key to the sections 8 



Key to the families 9 



Keys to the genera and species 32 



Glossary 274 



Bibliography 284 



Taxonomic Monographs and Revisions 286 



Author Index 298 



Index of Plant Names , 301 



FIGURES 



Vegetational Map of Illinois vii 



County Map of Illinois 273 



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