The Myxomycetes of the Miami Valley, Ohio. 



37 



loose net-work of rather small meshes, with wide expansions 

 at the angles ; the tubules filled with white granules of lime, 

 sometimes confluent toward the base of the sporangium. 

 Spores subglobose, very minutely warted, dark violaceous, 

 11-14 mic. in diameter. 



Growing on old wood, bark, leaves, etc. Sporangia .8-1.6 

 mm. in length, with a thickness of .7-1.0 mm. This species 

 appears to be rare ; the only specimens known to me in this 

 country I have from Professor Thos. A. Williams, of South 

 Dakota ; they are identical with European specimens received 

 from leister. Physarum paniceuni' Fries, S. M., Ill, p. 141 ; it 

 approaches Physarum cinereum Batsch. 



8. Badhamia i^ilacina Fr. Sporangia globose or obovoid, 

 sessile or rarely substipitate, closely crowded together on a 

 thin, brownish hypothallus; the wall a firm, hyaline mem- 

 brane, with a thick, smooth, continuous outer-layer of lime, 

 varying in color from gray-white or drab to lilac and flesh 

 color. Capillitium of very thick tubules, forming a dense 

 net-work of small meshes ; the tubules stuffed with granules 

 of lime, which are white or colored somewhat as those in the 

 wall, often confluent in the center of the sporangium. Spores 

 globose, minutely warted, dark violaceous, 11-14 mic. in 

 diameter. 



Growing on wood, leaves, mosses, etc. Sporangium .5-. 7 

 mm. in diameter. The outer crustaceous layer of lime on 

 the wall crumbles and falls away, as in some species of 

 Diderma. The white form is Diderma continuum B. & C; 

 the lilac or flesh-colored form is Physai um lilacinum of Fries, 

 S. M., p. 141. I have seen it colored only white and drab. 

 Under a high magnifying power the sculpturing of the spores 

 is seen to be peculiar. 



X. SCYPHIUM Rost. Sporangium obovoid to oblong- 

 obovoid, stipitate or subsessile ; the wall a thickened, brown- 

 ish membrane, the surface entirely naked or only the upper 

 portion covered with granules of lime, breaking up irregu- 

 larly about the apex. Stipe variable in length, arising from 

 a common hypothallus and prolonged within the sporangium 

 as a columella. Capillitium of thick tubules, proceeding from 

 numerous points of the columella and forming a dense net- 



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