The Myxomycetes of the Miami Valley, Ohio. 



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lar net-work of slender threads, more or less expanded at the 

 angles; the lime nodules small, tawny or yellowish, not 

 numerous, ellipsoidal or fusiform, by confluence elongated 

 and irregular. Spores globose, even, violaceous, 6-7 mic. in 

 diameter. 



Growing on old wood, mosses, etc. Sporangia .2-4 mm. in 

 diameter at the apex, densely packed and their walls grown 

 together, approaching the aethalioid structure ; the lime- 

 nodules from one to two or three times the diameter of the 

 spores in thickness. I have described my specimens, which 

 are abundant, very carefully, and judge them to be referable 

 to this species ; if so, they show that the species should be 

 kept apart from Physarum virescens. Didymium 7iectri<zforme 

 B, & C, is evidently this same species. 



14. Physarum lateritium B. & R. Sporangia sessile, 

 irregularly globose and gregarious, or by confluence more or 

 less elongated and plasmodiocarp; the wall a thin violaceous 

 membrane, rugulose and iridescent, closely covered with 

 small irregular scales of lime, from testaceous or brick-red to 

 bright red in color. Capillitium a dense irregular net-work 

 of tubules, much expanded at the angles ; the nodules of 

 lime small, very numerous, roundish or angular, whitish or 

 yellowish, sometimes tinged with red granules. Spores 

 globose, very minutely warted, violaceous, 8-10 mic. in 

 diameter. 



Growing on old wood, sticks, leaves, etc. Sporangia .4~.6 

 mm. in diameter, by confluence sometimes much elongated ; 

 the lime-nodules two or three times the diameter of the 

 spores in thickness. Didymium lateritium B. & R. Phy- 

 sarum mequale Peck, is the same species. 



§2. SAXKiyivA. Iyime in the capillitium abundant, the 

 nodules large, angular or irregular, with pointed lobes and 

 branchlets. 



A. Sporangia stipitate, 



15. Physarum imitans Racib. Sporangium depressed- 

 globose, the base flattened or umbilicate, stipitate, erect or 

 cernuous ; the wall a thin violaceous membrane, with a 



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