Bui. 149, Bureau of Plant Industry, U. S. Dept. of Agriculture. 



PuATE 



FIG. 1. CROSS SECTION OF A LIVING BEECH TREE DISEASED BY 

 FOMES IGNIARIUS. 



FIG. 2. CROSS SECTION OF A LIVING RED OAK TREE ROTTED BY 

 FOMES EVERHARTII. 



