TUBIFERA 155 



approach very near to Cribraria through C. argillacca. The 

 most complex remind us of Entcridinm. 



This is Perichcena c&spitosa Peck. In this country it has, 

 however, been generally distributed as L. effusa Ehr. This 

 author throws some doubt on the species he describes by sug- 

 gesting that the plasmodium may be red. The description, 

 however, and figures are otherwise good and are established by 

 the usage of Rostafinski. The plasmodium has much the same 

 color as the mature fruit. 



Widely distributed. New England to the Black Hills, south 

 to Arkansas. 



2. Tubifera Gmelin. 



1791. Tubifera Gmelin, Syst. Nat., II., p. 1472. 



Sporangia tubular, by mutual pressure more or less pris- 

 matic, connate, pale ferruginous brown, iridescent, the walls 

 thin, slightly granular, long, persistent ; dehiscence apical ; 

 hypothallus thick, spongiose, white or whitish; spore-mass fer- 

 ruginous. 



This genus is easily recognized by the tubular sporangia, 

 destitute of capillitial threads, seated upon a strongly developed 

 hypothallus. The synonymy of the case is somewhat difficult. 

 It is possible that Mueller's Tubulifcra ceratum, Fl. Dan. Ellevte 

 Haefte, 1775, p. 8, may belong here, but neither the text nor the 

 figures make it certain. Neither he nor CEder, who gives us 

 T. crcmor in the same work, had any accurate idea of the objects 

 described. Gmelin's description of Tubifera, II., 2, 1472, is, 

 however, ample, and his citations of Bulliard's plates leave no 

 doubt as to the forms he included. Gmelin writes : " Thecae 

 (membranae expanses superimpositae) inter se connatae seminibus 

 nudiusculis repletae." 



Why, in face of so good a description, Persoon changed the 

 name to that since current, Tnbulina, is not clear. 



Fries thinks Mueller had an immature Arcyria before him, 

 Syst. Myc., III., p. 196. Tubulifera aracJmoidea Jacq., 1778, is 

 also an uncertain quantity, insufficiently described. 



