PLATE 3 
Mycelium of the Rhizoctonia in the tissues of Missionary strawberry. Drawn 
with the aid of a camera lucida, Zeiss, 1.5 mm. Obj., 8 oc. Reduction about 
one-third. 
A. —Section along the edge of a vascular bundle in the pulp. Hyphae push 
in between the long conducting cells forcing their walls aside. No intercellular 
spaces are present owing to the turgescence of the affected cells. Hyphae pene¬ 
trate the vascular tissues in all directions. 
B. —Section just beneath an akene, showing how the very small pulp cells in 
this region are entirely surrounded by intercellular hyphae which push up closely 
to the fruit or seed coats whose cells are thickened or sclerotized. No nuclei are 
visible in the host cells. 
