PLATE 8 
Camera-Iucida drawings of Phytophihora parasitica var. rhei. 
A. —Outline drawing of an intercalary chlamydospore, showing the thick wall', 
somewhat exaggerated. 
B. —Various stages in zoospore emergence. 
C. —Sporangia in outline, showing relation of granular protoplasmic contents to the 
papillae. 
D. E, and F.—Sporangia as found in pure culture, attached to irregular hyphae. 
G. —Oospore, showing relation of oogonium and antheridium on separate hyphae. 
H. —Oospore with the antheridium apparently an outgrowth of the same hypha as 
that from which the oogonium developed. 
I. —A sporangium drawn to show better than in C the relation of protoplasm to the 
papilla. Note also the thin wall of the papilla in contrast with the thick sporangium 
wall ending abruptly. 
Each scale division represents i/ioo mm. 
