THE SLIME MOLDS OF OHIO 
17 
network of hyaline threads expanded at the axils. Spores pale violet, 
minutely roughened, 9 to lOmmm. in diam. 
On corn stalks. (Miami Valley—Morgan). 
23. P. auriscalpum Cooke Sporangia gregarious, depressed globose, 
0.4 to 0.8mm. in diam., yellow or rufous, usually with short stalks. 
Sporangium wall membranous, containing yellow lime granules. Stalks 
short, dark brown, translucent. Columella absent. Capillitium. of large 
branching yellow lime knots connected by delicate hyaline threads. 
Spores violet brown, minutely spinulose, 9 to lOmmm. in diam. 
(Miami Valley—Morgan), (Ohio—Macbride). 
24. P. tenerum Rex. Sporangia gregarious, globose, small, 0.4mm. 
in diam., yellowish, stalked. Sporangia wall membranous containing 
rounded clusters of lime granules. Stalk long, yellow, darker below. 
Columella absent. Capillitium of numerous rounded yellow lime knots 
connected by a dense network of hyaline threads. Spores violet brown, 
minutely roughened, 7 to 9mmm. in diam. 
Not rare in Ohio. 
24b. P. citrimun Schum. Sporangia gregarious, globose, yellow, 
stalked, 0.4 to 0.7mm. in diam. Stalk stout, furrowed, golden yellow, 
opaque. Columella conical or obtuse, short. Capillitium of numerous 
rounded yellow lime knots connected by a network of rigid hyaline threads 
persistent after spore dispersal. Spores violet brown, nearly smooth 7 to 
9mmm. in diam. 
(Ohio—Macbride), (Miami valley—Morgan), (Lorain Co.—Oberlin 
College Herb.). 
25. P. galbeum Wing. Sporangia scattered, globose, 0.4 to 0.5mm. in 
diam., yellow, smooth, stalked, erect or nodding. Sporangia wall 
membranous, containing dense clusters of yellow lime granules. Stalk 
subulate, longer than the diameter of the sporangium, yellow, sometimes 
darker below. Capillitium a dense network of light colored threads with 
scanty lime knots which when present are found in the axils of the 
network. Spores pale violet, almost smooth, 7 to 9mmm. in diam. 
Cuyahoga County. 
26. P. melleum (Berk. & Br.) Mass. Sporangia scattered, globose, 
0.5mm. in diam., yellow, stalked, erect. Sporangium wall membranous 
containing small yellow lime granules. Stalk white or light colored, stout, 
furrowed. Columella short, white, conical. Capillitium of large angular 
white or light colored lime knots connected by a network of delicate hy¬ 
aline threads. Spores violet brown, nearly smooth, 7 to 9mmm. in diam. 
Common. 
27. P. viride (Bull.) Pers. ,Sporangia gregarious, lenticular, 0.3 to 
0.5mm. in diam., yellow, stalked, nodding. Sporangium wall membranous 
2 o B s 
