PLATE 44 
A. —Flax seedlings as grown in the tube culture for penetration studies: a> Seed¬ 
lings of susceptible flax in tubes inoculated with Fusarium Uni. b, Susceptible flax 
seedlings growing in uninoculated tube, c, Resistant flax seedlings growing in un¬ 
inoculated tube, d, Resistant flax seedlings in tubes inoculated with F. Uni. 
These seedlings were killed as readily as susceptible seedlings under these conditions. 
B. —Flax plants growing in North Dakota “flax-sick soil.” a t Resistant flax 
No. 4. b t Susceptible No. 3. 
C. —Flax plants grown on soil from Madison, Wis. This soil was sterilized and 
inoculated with pure cultures of F. Uni. a , Susceptible No. 3. b , Resistant 
No. 4. 
