PLATE 5 
Puccinia graminis tritici form III on Mindum 
A. —Two-day infection. Dead infecting hypha a at head of stoma. Attacked cell 
dying and adjoining cells d and t harmed. Dead haustorium at b and nucleus c 
pressed against it. X1460. 
B. —Seven-day infection. Group of hyphae at 6. The body and neck of the 
haustorium a and the heavy layer coating it are dead. Adjoining cells at c and e 
are plasmolyzed and the wall at d is swollen. X1460. 
C. —Seven-day infection. Dead haustorium a with cytoplasm of host cell con¬ 
centrated about it in layers. Nucleus b dead and flattened. X1460. 
D. —Eleven-day infection. Two haustoria from the mother cells at d. One in a 
dead mesophyll cell at a is nearly dissolved. Nucleus is at 6. The second, c, is an 
epidermal cell, shows some lamination, and is covered by a transparent irregularly 
laminated sheath. X1460. 
E. —Seven-day infection. Large, nearly normal haustorium in an epidermal cell. 
