THE SLIME MOLDS OF OHIO 
29 
1. C. longa Peck. Sporangia clustered, cylindrical, drooping, 2 to 5cm. 
long, black, stalked. Stalk slender, 1 to 3mm. long, black, arising from a 
well developed black hypothallus. Columella slender, weak. Capillitium 
a lax network of dark brown threads which end in rigid free tips. Spores 
dark brown, spinulose, 8 to 9mmm. in diam. 
(Miami Valley—Morgan), (Ohio—Macbride), (Lorain Co.—Oberlin 
College HerbariumJ. 
2. C. nigra (Pers.) Schroeter. Sporangia scattered, globose or cylindri¬ 
cal, 1 to 6mm. high, purplish brown, stalked. Stalk long, slender, black, 
shining. Hypothallus indistinct. Columella extending to more than half 
the height of the sporangium. Capillitium a dense tangle of branching 
and anastomosing slender brown threads. Spores violet brown, nearly 
smooth, 7 to lOmmm. in diam. 
Occasional. 
Var. 1 .—aequalis Sturgis. Sporangia gregarious, cylindrical, slender, 
usually inclined. 
(Miami Valley—Morgan), Ohio—Macbride). 
3. C. laxa Rost. Sporangia scattered or gregarious, subglobose, or short 
cylindrical, obtuse, 1.5 to 3.5mm. high, stalked. Stalk short, stout, black, 
shining. Columella rigid, reaching nearly to the apex of the sporangium. 
Capillitium lax, of slender threads, somewhat branching and anastomosing. 
Spores violet brown, nearly smooth, 7 to lOmmm. in diam. 
Erie Co. Cuyahoga Co. Hocking Co. 
4. C. irregularis Rex. Sporangia gregarious, cylindrical, 2 to 5mm. 
high, dark brown, stalked. Stalk black, slender. Columella slender, 
reaching nearly to the apex of the sporangium. Capillitium a network of 
arcuate brown threads, paler towards the ends. Spores brownish purple, 
closely spinulose, 8 to lOmmm. in diam. 
fMiami Valley—Morgan), (Ohio—Macbride). 
5. C. pulchella (Bab.) Rost. Sporangia ovoid or cylindrical, very small, 
1 to 2mm. high, scattered, reddish brown, stalked. Stalk short, stout, 
black. Columella reaching nearly to the apex of the sporangium. Capil¬ 
litium a network of flexuous brown anastomosing threads, looped at the 
surface and with a few free ends. Spores pale lilac brown, minutely warted. 
6 to 8mmm. in diam. 
(Lorain Co.—Oberlin College Herbarium). 
Var. 1 .^—tenerrima (Curt.) Lister. Sporangia shortly cylindrical. Stalks 
0.5 to 1.5mm. high. Spores and slender capillitium flesh colored. 
(Miami Valley—MorganV 
Var. 2 .—gracilis (Wing.) Lister. Sporangia narrowly cylindrical. Stalks 
0.2 to 0.5mm.high. Capillitium threads usually uniting to form a close 
