146 TIMBER AND SOME OF ITS DISEASES. [CHAP. 



FIG. IT. Portion of root of a spruce-fir, with fructification of Trametes radicifierda 

 (after Hartig). Each fructification is a yellowish-white mass of felt-like substance 

 spread over the root, and with minute pores, in which the spores are produced on 

 its outer surface ; the mycelium which has developed it is in the interior of the 



fcMA* 



