Fig. 31. — Fomes annosus. Annular rot with a central 

 unrottecl core (x i^y). 



Fig, 32. — Fome^ annosus. Figured rot ; the central portion shows advanced 

 rot -with white specks. Farther out the rot has not reached this stage, but 

 clearly shows layers of insoluble gum ( x ^^). 



