26 
OHIO BIOLOGICAL SURVEY 
lime. Stalk short, stout, striated, dark brown, opaque, granular, arising 
from a broad base. Columella large, hemispherical, rough above, dark 
brown. Capillitium of sparingly branched, course, usually dark threads. 
Spores purplish, roughened, 9 to 12mmm. in diam. 
Rather common. 
6. D. minus Lister. Sporangia gregarious, subglobose, depressed, 
umbilicate below, 0.5mm. in diam., white or gray, stalked. Stalk slender, 
granular black. Columella hemispherical, rough. Capillitium of'sparingly 
branched delicate threads. Spores purplish, minutely roughened, 7 to 
9mmm. in diam. 
Rather common. 
7. D. nigripes (Link) Fries. Sporangia gregarious, subglobose, 
umbilicate below, 0.6mm. in diam., white, stalked, erect. Sporangium wall 
brown, frosted with irregular crystals of lime. Stalk slender, furrowed, 
translucent, dark in color. Columella subglobose, dark brown. Capillitium 
of delicate sparingly branched purplish or colorless threads. Spores violet, 
minutely roughened, 8 to llmmm. in diam. 
Common. 
8. D. xanthopus (Ditmar) Fries. Sporangia gregarious, subglobose, 
umbilicate below, white, stalked. Stalk slender, erect, orange yellow. 
Columella subglobose, white. Capillitium and spores similar to those of D. 
nigripes. 
Erie Co. (Miami Valley—Morgan). 
9. D. anellus Morgan. Sporangia circular or plasmodiocarpous 
depressed, 0.3 to 0.5mm. in diam., gray or brown, sessile. Sporangium 
wall membranous, sparingly frosted with minute crystals of lime and 
dehiscing in a circumcissile manner. Columella absent. Capillitium of 
slender violet brown threads, simple or sparingly branched. Spores 
purplish, minutely spinulose, 7 to 9mmm. in diam. 
(MiamiValley—Morgan), (Ohio—Macbride), (Ohio—Lister). 
ORDER 2. STEMONITALES 
Sporangia distinct or combined into an aethalium. Lime not present. 
Capillitium of solid threads, which with the spores is dark in color, 
occasionally light brown or colorless. 
FAMILY 3. STEMONTACEAE 
Sporangia distinct, stalked. Stalk extending into the sporangium as 
a columella, from which the branching threads of the capillitium take 
their origin. Sporangium covered by a delicate wall which is often 
evanescent. 
