PLATE 2. 
A. —Uredinia of stripe rust on seedlings of Hordeum nodosum. These plants became 
infected from older plants around which they, were growing. 
B. —Uredinia of stripe rust on seedlings of wheat which grew near older plants which 
were heavily infected. Seed from the same lot sown some distance from any infected 
plants produced seedlings free from the disease. 
