PLATE II 
Helminthosporium dictyoides 
A.—Young plant of Festuca elatior, showing numerous net-blotch lesions on the two 
older leaves, the lowermost one beginning to wither at the tip. X K- 
Ba-q.—Conidia from leaf of Festuca elatior, showing variation in size, shape, and 
septation. X 500. 
C.—Part of leaf of Festuca elatior, showing reticulate pattern of dark longitudinal 
and transverse streaks within diffusely discolored areas. X 3. 
Da-k.—Conidia from leaf of Festuca elatior, germinating in water by the production 
of lateral or oblique germ tubes, usually from the end segments, and less frequently 
from an intermediate segment {Da, h). X 500. 
Ea-i.—Conidiophores of //. dictyoides, one ^oup {Ea-f) emerging from between 
adjacent epidermal cells, the other group (Eg-i) emerging from a stoma. Branching 
like that shown in Eg is relatively infrequent. Hyphae within the tissue of the leaf, 
visible in glycerine preparations stained with eosin are indicated by heavier stippling. 
X 500. 
