1916] PARASITIC EHIZOCTONIAS IN AMERICA 381 



On Oat A (jar. Growth good. Mycelium white, loose, flat, and fairly dense; 

 edge tufted. Zonal ion. 



On Potato A gar. Growth poor. Mycelium scant, like that produced by strains 

 from carnation. 



On Potato-Glucose Agar. Growth poor. Mycelium white, loose, scattered, 

 and somewhat flaky ; edge very irregular. Zonation. 



On Agar XII. Growth poor. Mycelium white, fine, loose, flat, and scatter- 

 ing; edge very irregular. Zonation indistinct. 



' ' CARNATION K.M.2 ' ' 



On Corn-Meal Agar. Growth good. Mycelium white, tufted, and somewhat 

 compact. No zonation. 



On Green-Bean Agar. Growth fair. Mycelium white, tufted, azd compact. 

 Zonation indistinct. 



On Oat Agar. Growth fair. Mycelium white, loose, and somewhat flaky at 

 center; edge loose and irregular. Zonation. 



OH Potato Agar. Growth poor. Mycelium loose and fine. Zonation indis- 

 tinct. 



On Potato-Glucose Agar. Growth fair. Mycelium brown, loose, and flat; 

 edge loose and tufted. No zonation. 



On Agar XII. Growth fair. Mycelium white, loose, flat, and scattered. No 

 zonation. 



"CARNATION K.D.C." 



On Corn-Meal Agar. Growth good. Mycelium white, loose, tufted, and rather 

 dense. No zonation. 



On Green-J lean Agar. Growth good. Mycelium white, loose, tufted, and 

 dense. Zonation distinct. 



On Oat Agar. Growth fair. Mycelium white, somewhat dense at center, and 

 more tufted at edge. Zonation. 



On Potato Agar. Growth poor. Mycelium loose and flat, darkening slowly 

 with age. Zoi.ntion indistinct. 



On Potato-Glucose Agar. Growth fair. Mycelium white, flat, and flaky at 

 center; edge loose and fluffy. Zones numerous and distinct. 



On Agar XII. Growth poor. Mycelium white, somewhat flaky at center; edge 

 irregular and scattered. Zonation. 



"CARROT" 



On Corn-Ideal Agar. Growth good. Mycelium white, fine, and somewhat com- 

 pact. No zonation. 



On Green-Bean Agar. Growth poor. Mycelium loose, flat, and somewhat 

 fluffy ; white at first, followed by purplish tinge. Zonation not very distinct. 



On Oat Agar.-r-Growth fair. Mycelium white, fine, loose, and flat. Zonation 

 indistinct. 



On Potato Agar. Growth fair. Mycelium dark, dense, and compact. Zona- 

 tion indistinct. 



On Potato-Glucose Agar. Growth fair. Mycelium dark, loose, flat, and flaky. 

 Four to six zones present. 



On Agar XII. Growth slow. Mycelium white, loose, and somewhat flaky. 

 Zonation. 



