PLATE i 
Phyllostictina carpogena Shear 
A. —Section of a “pycnosclerotium”; outer cells darkly colored; central cells thin- 
walled. ' 
B. —Similar structure, a little older. An open space nas been formed, and into this 
space the next surrounding cells have grown. 
C. —Further increase in size of the central cavity. Disorganizing cell remains lie 
about in the cavity. 
D. —Fully organized pycnidium. 
E. —Mature pycnidium, showing a small elliptical ostiolar cavity. 
F. —A spermogonium, showing fine, threadlike outgrowths from the inner-wall cells. 
They have usually disappeared by the time the first distinct spermatia are formed. 
G. —An older spermogonium; spermatiophores clearly delimited; pycnospores in 
the cavity. 
Figures B, C, D, E, and G were photographed with a 3-mm. oil-immersion lens; 
Figures A and F with a 4-mm. dry lens. 
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