The Myxomycetes of the Miami Valley, Ohio. 



5 



the tubules enlarging at intervals into vesicles, which usually 

 contain nodules of lime. Spores globose, violaceous. 



A genus characterized by the form of the sporangia and the 

 smooth and glossy surface of the wall. 



1. L,EOCArpus psittacinus Ditm. Sporangium small glo- 

 bose or somewhat depressed, stipitate or subsessile; the wall 

 a thin membrane, rugulose and iridescent, with thicker red or 

 yellow spots and patches, destitute of lime. Stipe weak, erect 

 or inclined, variable in length, the base expanded, orange to 

 red in color. Capillitium a dense net-work of tubules, widely 

 expanded at the angles and bearing numerous irregular 

 vesicles, various in size and form, yellow or orange to red in 

 color. Spores globose, even, dark violaceous, 7-9 mic. in 

 diameter. 



Growing on old wood, leaves, etc. The sporangium .5-. 6 

 mm. in diameter, the stipe abbut the same length or some- 

 times very short. The sporangia are dull brownish to the 

 naked eye, but when magnified the green, purple, and blue 

 metallic tints of the wall become apparent. There does not 

 appear to be any granules of lime either on the wall or in the 

 capillitium. Physarum psittacinum Ditm. 



2. IvKOCArpus c.'ESpitosus Schw. Sporangium small sub- 

 globose or obovoid to turbinate, somewhat irregular, stipitate 

 or subsessile; the wall a reticulately thickened and fragile 

 membrane, yellow-brown to greenish-yellow or olivaceous in 

 color, externally rugulose and glossy, the inner surface with 

 scales and patches of lime. Stipe short and thick, sometimes 

 nearly obsolete, yellowish or reddish brown, darker below, 

 the base expanded into a small hypothallus. Capillitium a 

 loose irregular net-work of tubules with wide expansions at 

 the angles; the nodules of lime large, numerous, white or 

 yellowish, irregular, with acute angles and pointed lobes. 

 Spores globose, minutely warted, dark violaceous, 9-1 1 mic. 

 in diameter. 



Growing caespitosely or scattered on old wood and mosses. 

 Sporangium .6-8 mm. in diameter, variable in shape, the 

 stipe usually very short. Physarum ccsspitosum Schw., North 

 American Fungi. My specimens, some of them, have been 

 referred to Physarum citrinellum Peck ; others to Physarum 

 variabile Rex. 5 



