22 
OHIO BIOLOGICAL SURVEY 
ella convex, white or light brown. Capillitium of delicate purple, branch¬ 
ing threads. Spores violet brown, spinulose, 8 to llmmm. in diam. 
Common. 
3. D. globosum Pers. Sporangia crowded, globose, 0.5 to 0.8mm. in 
diam., smooth, white, sessile. Sporangium wall double, the outer forming 
a hard egg shell like crust, widely separated from the membranous inner 
wall. Columella hemispherical, white or somewhat colored. Capillitium of 
delicate purplish branching threads. Spores dark brown, spinulose, 10 to 
14mmm. in diam. 
Common. 
4. D. hemisphericum (Bull.) Hornem. Sporangia scattered, disc¬ 
shaped, 1 to 1.2mm. in diam., stalked, white. Sporangium wall double, 
the outer fragile, the inner membranous and more persistent. Stalk about 
1mm. long, brownish, wrinkled. Columella indistinct. Capillitium of 
slender branching threads, usually colorless. Spores violet brown, nearly 
smooth, 7 to 9mmm. in diam. 
Erie Co. Hocking Co. 
5. D. testaceum (Schrad.) Pers. Sporangia gregarious, or crowded, 
subglobose, depressed, 0.8mm. in diam., pale pink, bleaching with age. 
Sporangium wall double, the outer shell like, brittle, smooth, separate from 
the gray membranous inner wall. Columella large, convex, pink or brown. 
Capillitium of delicate purplish branching threads. Spores violet brown, 
nearly smooth, 7 to 8mmm. in diam. 
Common. 
6. D. floriforme (Bull .) Pers. Sporangia crowded, globose, smooth, 
0.8mm. in diam., stalked, white or brown. Sporangium wall double, the 
outer cartilaginous and splitting at maturity into several revolute petal 
like lobes. Stalk cylindrical, furrowed, brown. Columella prominent, 
ovoid. Capillitium of dark brown, slender, sparingly branched threads. 
Spores reddish brown, marked by scattered warts, 9 to llmmm. in diam. 
Not rare in Ohio. 
7. D. radiatum (L.) Lister. Sporangia scattered, depressed globose, 
flattened below, about 1mm. in diam., smooth, or slighty wrinkled, gray or 
brown, stalked or sessile. Sporangium wall double, the outer wall dehiscing 
in an irregular manner or in revolute lobes. Stalk short, stout, gray or 
usually brown. Columella large, subglobose, Capillitium abundant, of 
dark, brown, rigid, sparingly branched threads, spores dark violet brown, 
minutely roughened, 8 to llmmm. in diam. 
(Miami Valley—Morgan), (Ohio—Macbride). 
