18 
OHIO BIOLOGICAL SURVEY 
containing clusters of yellow lime granules, dehiscing in fragments. Stalk 
slender, furrowed, gray, sometimes darker below. Columella absent. 
Capillitium of small spindle shaped yellow lime knots connected by a net¬ 
work of hyaline threads which branch at an acute angle. Spores violet 
brown, smooth, 7 to 9mmm. in diam. 
Common. 
Var .—incanum Lister. Sporangia gray. Lime knots pale yellow. 
Erie Co. 
28. P. flavicomum Berk. Sporangia gregarious, subglobose, 0.4 to 
0.5mm. in diam., yellow stalked, nodding. Sporangium wall thin, mem¬ 
branous. Stalk slender, subulate, fluted, red. Capillitium of small yellow 
angular lime knots in a dense persistent network of hyaline threads. 
Spores violet brown, minutely roughened, 7 to 9mmm. in diam. 
(Miami Valley—Morgan), (Hamilton Co.—Lloyd Herbarium). 
29. P. murinum Lister. Sporangia gregarious, globose, 0.5mm. in 
diam., pale brown, rugulose, stalked or sessile, sometimes forming plasmo- 
diocarps. Sporangium wall membranous containing clusters of brown 
lime granules. Stalk slender, erect, brown, furrowed, containing lime. 
Columella short, conical. Capillitium of brown lime knots connected by a 
network of hyaline threads. Spores violet brown, nearly smooth, 8 to 
9mmm. in diam. 
Not rare. 
30. P. pulchripes Peck. Sporangia gregarious, globose, about 0.5mm. 
in diam., red or brown, stalked. Sporangium wall membranous containing 
lime granules. Stalk red, often darker below, slender, tapering, brittle. 
Columella short, conical. Capillitium of rounded reddish lime knots 
connected by a dense persistent network of hyaline threads. Spores violet 
brown, nearly smooth, 7 to 8mmm. in diam. 
(Miami Valley—Morgan), (Ohio—Macbride). 
31. P. pulcherrimum Berk. & Rav. Sporangia gregarious, globose, 
about 0.5mm. in diam., purple or wine red, stalked, erect. Sporangium 
wall membranous containing clusters of large purple lime granules. 
Stalk purple, 1mm. long, brittle. Columella small or absent. Capillitium 
of numerous small rounded purple lime knots connected by a dense network 
of delicate‘light purple threads. Spores pale red, nearly smooth, 7 to 
8mmm. in diam. 
Not rare. 
4. PHYSARELLA Peck. 
Physarella oblonga (B. & C.) Morgan. Plate 1, Fig. 5, 5a, and 5b. 
Sporangium pervious to the base, the interior walls forming a persistent 
spurious columella; capillitium composed of filaments with here and there 
minute knot-like thickenings, straight tubes containing lime granules 
