Bui. 226, Bureau of Plant Industry, U. S. Dept. of Agriculture, 



Plate XIII. 



Fig. 1 .— Leaf of Winged Elm Affected with Scab Due to Gnomonia Ulmea. 

 Fig. 2.— Leaf of Red Mulberry, Showing Eye-Spot Due to Cercospora Moricola. 

 Fig. 3.— Leaf of Live Oak, Showing Tar-Spot Due to Rhytisma Erythrosporum. 

 Fig. 4.— Leaflets of Black Locust, Showing the Characteristic Spotting Due to 



Cylindrosporium Solitarium. 



