THE SLIME MOLDS OF OHIO 
43 
2. PERICHAENA Fries. 
Perichaena depressa Lib. Plate VIII, Figs. 3, 3a, and 3b. 
Sporangia flat or depressed globose. Sporangium wall double, the 
outer layer containing angular granules of dark refuse material. Capillitium 
of slender, simple or branched, yellow threads, minutely warted or nearly 
smooth. Spores yellow, minutely warted. 
A. Sporangia flat. 1. P. depressa 
A. Sporangia depressed globose. 2. P. corticalis 
1. P. depressa Libert. Sporangia crowded, polygonal by mutual 
pressure, flat, 0.5 to 1mm. in diam., brown, dehiscing by a deflnite lid. 
Capillitium a network composed of abundant slender yellow threads 
of variable width, minutely warted. Spores yellow, minutely warted, 
10 to 12mmm. in diam. 
Common. Upon and under bark of logs and dead trees. 
2. P. corticalis (Batsch) Rost. Sporangia gregarious, depressed 
globose, 0.5 to 1mm. in diam., purple brown, dehiscing by a more or less 
definite lid. Capillitium scanty, of slender weak yellow threads of variable 
width, minutely warted. Spores yellow, minutely warted, 11 to 14mmm. 
in diam. 
Common. On bark of logs and dead trees. 
3. OPHIOTHECA Currey. 
Ophiotheca chrysosperma Currey. Plate VIII, Figs. 4, 4a, and 4b. 
Sporangia globose, sessile, or generally forming slender curved, or 
ring shaped plasmodiocarps. Sporangium wall double, the outer layer 
containing granular matter. Capillitium a netwmrk of threads with many 
free ends, and marked by spines or warts. 
A. Capillitium spinous. 1. O. chrysosperma 
A. Capillitium warted. 2. O. vermicularis 
1. O. chrysosperma Currey. Sporangia subglobose or forming curved 
and ring shaped plasmodiocarps, 0.5 to 1mm. in diam., brown, sessile. 
Capillitium abundant, of spinous branching threads variable in size and 
with irregular constrictions. Spores yellow, minutely warted, 9 to lOmmm. 
in diam. 
Common on bark of fallen trees. 
2. O. vermicularis (Schw.) Macbr. Sporangia scattered, globose or 
forming slender curved plasmodiocarps about 0.5mm. in diam., dull gray, 
sessile. Capillitium abundant of yellow branching warted threads 2 to 
4mmm. in diam. and having irregular constrictions. Spores yellow, 
minutely warted, 10 to 15mmm. in diam. 
On dead herbaceous stems. Apparently not common. Cuyahoga Co. 
(Miami Valley—Morgan), (Ohio—Macbride). 
