PLATE 41. FUNGOUS AND OTHER DISEASES. 



t. 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 PhyUosticta pavice. 8. Partly 

 dead Red Maple with fruiting bodies of the sap-rot fungus Hopa'.opih. gilvus. 



