Bui. 36, Buceau of Plant Industry, U. S. Dept. of Agriculture. 



Plate XI. 



Figs. 1, 2.— Sections from the Top of a Fallen Tree. 



Fig. 3.— Section from a Standing Pine, 4 Feet from the Ground. 



SECTIONS FROM "BLACK-TOP" WESTERN YELLOW PINE TREES, 

 SHOWING ADVANCED STAGES OF DECAY. 



