Bui. 60, Bureau of Plant Industry, U. S. Dept. of Agriculture. 



Plate 111. 



Fig. 1.— Agar Plate Colonies of the Calla Organism Grown at 25^ C. 



Fig. 2.— Agar Plate Colonies of the Calla Organism Grown at SS"^ C. 



Fig. 3.— Colonies of the Calla Organism in Test Tubes. 



