PLATE 4 
A. —Three plants of Festuca octoflora to the left and two of Hordeum pusillum to the 
right, all badly attacked by Ophiobolus cariceti. (Slightly enlarged.) 
B. —Spikelet of Festuca octoflora to the left and lower part of culm to the right, 
showing perithecial beaks of Ophiobolus cariceti. (Slightly enlarged.) 
C and D.—Asci and ascospores of Ophiobolus cariceti from perithecia found on 
Chaetochloa geniculata. Magnified about 300 times. 
