TABLE OF CONTENTS. 



Introduction 1 



Distribution and abundance of Polyporaceae causing the decay of 



timber trees in certain regions of Northern Wisconsin 2 



Key to genera 23 



Description of species 24 



Solenia 24 



Porothelium 25 



Merulius 25 



Gleoporus 30 



Favolus 31 



Daedalea 33 



Trametes 36 



Poria 45 



Polystictus 59 



Fomes 70 



Polyporus 87 



Fistulina . . 117 



Boletinus 118 



Strobilomyces 121 



Boletus 122 



Bibliography 149 



Glossary 150 



Index 153 



