ENTERIDIUM 237 



Very common. Often confused with Reticularia ly coper don, from 

 which it may be distinguished by its brown, never silvery, color, and 

 the shining but uneven surface as well as by the distinctive pseudo- 

 capillitium. The Plasmodium as it emerges from the wood is watery 

 white, becoming pale pink or flesh color and slowly deepening to brown 

 as the fructification forms. 



In the Appendix to his Monograph, p. 33 (1876), Rostafinski ap- 

 plied the name Reticularia (?) rozeana to specimens developed by 

 E. Roze, of Paris, on wood kept in a moist chamber. 



This original collection seems to have disappeared. Later Wingate 

 corresponded with Roze and received from him a small portion of a 

 specimen collected in 1887 in the same locality in which the original 

 specimen was found. On the basis of this evidence Wingate decided 

 that the original European specimen was the same as our common 

 American Enteridium, and published the name cited. The spores of 

 the form described by Rostafinski are said to have "the entire surface 

 uniformly warted" which is certainly not the case with the species 

 under consideration. A. Lister (Jour. Bot. 29 : 263, 1891) describes and 

 illustrates a form he calls Reticularia rozeana Rost., citing Rostafinski's 

 description in the Appendix, with densely crowded sporangia, uni- 

 formly spinulose reticulate spores and plates fraying out into threads. 

 In the third edition of the Mycetozoa this is referred to Liceopsis 

 lobata Torrend, but the spores are referred to as "sharply and closely 

 reticulated on two-thirds of their surface, faintly and loosely retic- 

 ulated on the remaining third." This may be what Rostafinski 

 had. 



It is customary to speak of the perforated plates of the pseudo- 

 capillitium as degenerate sporangial walls. They may be, but Wilson 

 and Cadman's study of Reticularia throws doubt on such assumption. 



Southern Canada, northern and central United States, Washington, 

 on decaying logs and stumps. Common, especially in the middle 

 west. Also reported from Europe and Japan. Some of these reports, 

 as suggested above, demand verification. Material received from 

 Professor Brandza, collected in Moldavia, agrees with American col- 

 lections. 



2. Enteridium liceoides G. List. 



Guide to Br. Mycet. ed. 4. 48. 1919. 

 1896. Enteridium olivaceum Ehr. var. liceoides List., Jour. Bot. 34 : 211. 



^Ethalium plasmodiocarpous, usually curved, simple or branched, 

 or forming a flattened network, dark brown or purple-brown, glossy; 



