290 THE MYXOMYCETES 



15. Trichia erecta Rex 



Proc. Acad. Nat. Sc. Phila. 1890 : 193. 

 PL XIX, Figs. 514, 515. 



Sporangia gregarious, often in clusters of two or three together, but 

 generally single, nut-brown, checkered with broad, conspicuous yellow 

 dehiscence bands, globose, 0.5 mm. wide, stipitate; stipe double the 

 sporangium, dark brown, solid, rather thick; capillitial mass bright 

 yellow, the elaters cylindric, 3-4 ii wide, terminating in short and 

 smooth apices, spirals four, coarsely spinulose, winding unevenly or 

 branching and so united one to another; spore-mass yellow; spores by 

 transmitted light pale, globose, minutely warted, 11-13 fx. Plasmodium 

 white. 



Distinguished at sight by the peculiar mottled peridium. T. botrytis 

 in its ochraceous forms sometimes shows a tendency to the same thing, 

 but the checkered surface is here conspicuous. The elaters resemble 

 those of the preceding form, but are remarkably spiny. 



New York, Tennessee, Washington; Europe, Ceylon, Australia. 



16. Trichia subfusca Rex 



Proc. Acad. Nat. Sc. Phila. 1890 : 192. 

 PL XIX, Figs. 516, 517, 518. 



1894. Trichia botrytis Pers. var. subfusca (Rex) Lister, Mycetozoa 172. 



Sporangia gregarious, scattered, dull tawny brown, shading to dark 

 brown below, without lines of dehiscence, about 0.5 mm. in diameter, 

 globose, stipitate; stipe short, about equal to the sporangium, stout, 

 brown or brownish black, rugulose, solid; capillitial mass bright straw 

 color; the elaters long-cylindrical, 3-4 n wide, with four spirals, which 

 wind unevenly, are perfectly smooth, and terminate in abrupt tips 

 about twice the diameter of the elater; spores yellow, minutely and 

 closely warted, globose, 11-14 ju. Plasmodium chocolate brown. 



The spores of this species closely resemble those of T. botrytis, but 

 the sporangium is at sight different in appearance and proportions 

 and the capillitium not the same at all. The elaters are never fusiform, 

 the apices always abruptly pointed, and the sculpture irregular and 

 uneven. In form the elater resembles that of T. scabra. 



The elaters of uniform diameter, the apices abruptly narrowed to 

 a blunt point, turned to one side, will serve to distinguish this species 

 from the whole T. botrytis group, some forms of which it outwardly 

 resembles. We have beautiful specimens from the shores of Puget 

 Sound. 



New York, Washington; Europe, Ceylon. 



