1922] MILBRAITH—ALTERNARIA 321 
The causal fungus grew luxuriantly on all common culture 
media. Sporulation was abundant, and the mycelium was greatly 
suppressed. En masse, the color of the colony is light olivaceous 
on starchy media and dark olivaceous on nitrogenous media. 
ee ae 
Fic. 1.—Cabbage leaf showing abundant spots caused by Alternaria oleracea; 
note absence of zonation characteristic of many Alfernaria spots. 
Zonation in the colony was not visible. A description of the 
fungus is as follows: 
Alternaria oleracea, n. sp. 
Hyphae short, greatly subordinated, straight, sparsely branched, 
occasionally septate, very light olivaceous to hyaline, average 
4.5m in diameter; conidiophores short, light olivaceous, short 
