;46 TIMBER AND SOME OF ITS DISEASES, [chap. 



Pjq, jt. Portion of rout of a spruce-fir, with fructification of T->a.meies radicijfcrda 



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

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

 its outer surface ; the mycehum. which has developed it is in the interinr of the 

 root. 



