^ "<^ - ^ - 



Bui. 25, Div. Veg. Phys, & Path., U. S. Depl. of Agriculture. 



PLATE XIV. 





FIG. 3. 



Fig. 1 EARLY STAGE AND FIGS. 2 AND 3 SUCCESSIVELY LATER STAGES OF THE DECAY 



CAUSED IN White Spruce by Polyporus subacidus Peck. 



