PARASITIC EHIZOCTONIAS IN AMERICA 



385 



On Potato Agar. Growth fair. Mycelium dark, loose, and fluffy. Zonation 

 distinct. 



On Potato-Glucose Agar. Growth fair. Mycelium white, flat, loose at edge 

 and flaky at center. Three zones present. 



On Agar XII. Growth very slow. Mycelium white, dense, and bushy, form- 

 ing a tuft at the center. No zonation. 



" SAL VIA " 



On Green-Bean Agar. Growth good. Mycelium white, tufted, and compact 

 Zonation indistinct. 



On Oat A gar. Growth good. Mycelium white, loose, flat, rather dense, and 

 radial. Zonation indistinct. 



On Potato-Glucose Agar. Growth fair. Mycelium white and flaky at center; 

 edge loose and tufted. Zonation indistinct. 



On Agar XII. Growth good. Mycelium white and flaky at center; edge loose 

 and tufted. Zonation indistinct. 



"SEDUM" 



On Green-Bean Agar. Growth good. Mycelium flat and compact. One zone 

 present. 



' ' SUGAR CANE ' ' 



On Corn-Meal Agar. Growth fair. Mycelium white, fine, and scarcely visi- 

 ble. No zonation. 



On Green-Bean Agar. Growth fair. Mycelium white, loose, and tufted. Zones 

 present. 



On Potato Agar. Growth fair. Mycelium white, fine, and practically all sub- 

 merged. Two indistinct zones present. 



On Agar XII. Growth fair. Mycelium white, fine, and running out in strands 

 from the center. No zonation. 



' * SWEET PEA ' > 



On Green-Bean Agar. Growth good. Mycelium flat and compact. One zone 

 present. In many respects like strain from carnation. 



' < THISTLE ' ' 



On Corn-Meal Agar. Growth fair. Mycelium white, running out in strands; 

 flat at center, and somewhat loose at edge. No zonation. 



On Green-Bean Agar. Growth good. Mycelium white, flat, radial, and com- 

 pact at center; edge somewhat loose and fluffy. Zonation indistinct. 



On Oat Agar. Growth good. Mycelium white, flat, dense, and radial. No 

 zonation. 



On Potato Agar. Growth fair. Mycelium white, flat, and somewhat compact, 

 running out in strands. No zonation. 



On Potato-Glucose Agar. Growth fair. Characterized by a white, radial, flat 

 mycelium. No zonation. 



On Agar XII. Growth fair. Mycelium white, flat, compact, and flaky at cen- 

 ter, becoming looser at edge. No zonation. 



