PLATE i 
A. —Ascocarps of Roesleria hypogaea , collected October, 1920, on root of French 
crab seedling grown in the garden of Columbia University, New York City. The 
writer’s cultures were obtained from ascospores from this specimen. 
B. —Culture of Roesleria on oatmeal paste in tube showing ascocarps, 10 months 
after inoculation. Natural size. 
C. —Apple root from tube culture showing numerous small ascocarps, 9 months 
old. Slightly magnified. 
D. —Apple root in tube showing ascocarps produced on the hyphal weft formed on 
the water at the bottom. Culture scarcely 5 months old. Natural size. 
E. —Apple root from tube culture showing a group of ascocarps somewhat older 
(9 months). The “peridium” in each has broken away. X 1.4. 
F. —Oatmeal paste agar culture removed from the tube showing groups of large 
ascocarps. Culture a year old. X i-4- 
G. —Oatmeal paste agar culture removed from the tube showing ascocarps on upper 
part of slant. Culture 5 months old. Natural size. 
