PrEAtTH XXX. 
Fig. 1— Luxuriant growth of sporophores of Polyporus parga- 
menus on a dead white oak (Quercus alba) trunk. 
Fig. 2.— A fire-scarred white oak (Quercus alba) that continued 
to grow vigorously despite the injury. The dead wood, however, was 
infected by Pélyporus pargamenus in the meantime and is now badly 
decayed, although the tree is still living. 
