Bui. 1120, U. S. Dept of Agriculture. 
Plate V. 
B 
Plants from Canker Nursery G. 
A , heat-cankered plants on the left; those on the right are not cankered. All four plants are of the 
same age. B. cankered plants as in A . C, the same plants as in B, enlarged to show the detail 
of the constricted areas and the enlargements just above these areas. Adventitious roots are 
starting at the soil line, on account of contact with moist soil. This does not oc-cur when the soil 
is drv. 
Y 
