1921-22 



DEPARTMENT OF LANDS AND FORESTS 



263 



fruiting-bodies or sporophores, the grayish hoof-shaped punks or brackets so 

 common on the trunks of its hosts (Figure 1). Most frequently this fungus 

 works from the crown down, though not invariably so. The true tinder fungus 

 abounds throughout Ontario, and is also frequent in the adjoining states. Von 

 Schrenk & Spaulding (Von Schrenk, H. & Perley Spaulding: Diseases of Decid- 



Fig. 2. — Section of living Beech Tree showing Heart Rot caused by the True Tinder Fungus. 



uous Forest Trees, Bull. No. 149, Bureau of Plant Industry, U.S. Dept. of 

 Agr., Washington, 1909) report that "In northern New England, New York, 

 Michigan, Wisconsin, and Minnesota in particular, the tinder fungus (Fomes 

 jomentarius) is one of the commonest wood-destroying forms found in decid- 

 uous forests." The observations of the writer have been made for the main 

 part in the Algonquin Park and the Lake Ontario areas. 



