PLATE 41.— FUNGOUS AND OTHER DISEASES. 



Partly dead Sugar Maple with fruiting bodies of sap-rot fungus, Elfvingia megaloma. 

 2. "Stag-head" White Maple. 3. Ulcers on Red Maple, suffering from gas-poisoning. 

 4. Fruiting bodies of Sulfur Polyporus (after illustration. Bulletin 149, Bureau of Plant In- 

 dustry, U. S. Department of Agriculture). 5. Leaf scorch of Sugar Maple. 6. Leaf of 

 European Linden, spotted by the Linden Rust, caused by Cercospora microsora. 7. Leaf 

 of Horse-chestnut curled as a result of Leaf Spot, caused by Phyllosticta pavice. 8. Partly 

 dead Red Maple with fruiting bodies of the sap-rot fungus Hopahpiht gilvus. 



