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



Plate XVI. 



Fig. 1.— Portion of Leaf of Century Plant Affected with Blight Due to 

 Stagonospora Gigantea. 



Fig. 2.— Margin of Same Leaf Slightly Enlarged, Showing the Distribution 



of Pycnidia. 



