Bui. 957, U. S. Dept. of Agriculture. 
Plate VI 
Leaves of Ribes Infected with Cronartium ribicola, Showing Different 
Types of Infection. 
Fig. 1.— Infected leaves of Eibcs glandulosum, showing lower surfaces; the sparsely scattered telia 
are well distributed over the entire surface. Etiolation caused by the disease is also evident. 
X f • Fig. 2.— Lower surfaces of leaves of Ribcs sp., showing etiolated spots where infection has 
taken place two days before uredinia were formed. X f. Fig. 3.— Lower surfaces of infected 
leaves of Ribes aureum, showing the disease distributed in local spots mostlv well separated from 
one another. On the right side of the right leaf a large area of leaf tissue has died. Etiolation 
from the disease is evident. X f. 
