Staphyleaceae 173 



Hippocastanaceae 175 



Rhamnaceae 177 



Vitaceae 184 



Hypericaceae 200 



Cistaceae 204 



Thymelaeaceae 206 



Elaeagnaceae 208 



Araliaceae 210 



Cornaceae 212 



Ericaceae 220 



Vacciniaceae 228 



Sapotaceae : 236 



Styracaceae 239 



Oleaceae 244 



Bignoniaceae 246 



Rubiaceae 249 



Caprifoliaceae 252 



Map of Illinois 274 



Glossary 275 



Index 287 



COLOR ILLUSTRATIONS 

 Prairie Rose, Rosa setigera Frontispiece 



FACING PAGE 



Silky Dogwood, Cornus Amomum 8 



American Bittersweet, Celastrus scandens 8 



Indigobush, Amorpha fruticosa 152 



Smooth Sumac, Rhus glabra 152 



Trumpetcreeper, Campsis radicans 248 



