Plate II. 



Cross section of a sugar maple {Acer saccharum Marsh.) log rotted 

 by Elf'vinyia inegaloma (Lev.) Murrill., X y^- Notice the irregularity 

 of the black zones surrounding the areas in various stages of decay. 

 This irregularity is due to the decay starting simultaneously from 

 several centers. 



52 



