PLATE 7 
Puccinia graminis tritici form III on Mindum 
A. —-Eleven-day infection. Older infection with an occasional wall greatly swollen 
and showing the layers of which it is composed. X1460. 
B. —Fifteen-day infection. Portion of infected leaf with dead stoma at d, a few 
scattered hyphae, and coated dead haustoria at a, b,c and e. Host cells first attacked, 
f f g and h, are dead and collapsed. Cells attacked later are empty but retain their 
shape. Occasional swollen walls. X333. 
