Bui. 89, U. S. Dept. of Agriculture. 



Plate I. 



Fig. 1.— Heart-Rot in Chestnut Caused by Polyporus Pilotae. 



The fungus entered at the dead branch and has moved downward into the heartwood of the 



tree proper. 



Fig. 2.— "Shoe Strings" of Armillaria Mellea beneath the Bark of a Felled 

 Chestnut Which had been Killed by This Fungus. 



