PLATE 8 
Helminthosporium. bromi 
A. —Portion of plant of Bromiis inermis, showing youngest leaf {Aa) healthy, the 
second {Ab), and third (Ac) bearing a number of spots, and the fourth (Ad) largely 
withered as a result of attack by Helminthosporium bromi. X H- 
B. —Portion of diseased leaf of Bromus inermis, showing etiolated areas surround¬ 
ing dark spots, the discoloration in the latter being most intense in the center and 
fading out toward the periphery. X 3. 
Ca-f.—Conidia from diseased leaf, showing variation in size, shape, and septation. 
X 500- 
Da-e.—Conidia germinating in tap water by the production of germ tubes indis¬ 
criminately from end and middle segments. The spores Db and Dc germinated lying 
in contact, the resulting germ tubes anastomosing immediately after their prolifera¬ 
tion. X 500. 
Ea-c.—Conidiophores of H. bromi emerging between adjacent epidermal cells of 
host. X 500. 
