PLATE 4 
Portions of inoculated leaves showing flecks or areas of tissue injured of destroyed 
by the fungus but no permanent infection resulting. This condition represents grade 
o in the five gradations of susceptibility to infection by Puccinia glumarum tritici. 
A. —Distal portion of leaves of Barletta wheat (C. I. No. 3297). 
B. —Distal portion of leaves of Einkom (C. I. No. 2433). 
