218 THE MYXOMYCETES 



height of the sporangium or longer, dark brown or black; caly cuius 

 one-third to one-half the sporangium, the margin toothed, the wall 

 ribbed and continuous with the open wide-meshed net; network deep 

 yellow or orange, the threads flattened; nodes expanded but not thick- 

 ened, with large light granules; free ends none; spores concolorous, 

 pale yellow by transmitted light, verruculose, 5-7 /z. 



Similar to C. minutissima but much larger and deep yellow to 

 orange in color. C. intermedia Schrad., cited in the Lister monograph 

 as a synonym, because of its pyriform shape, equal network and the 

 small number of veins in the lower part, should rather be included in 

 C. piriformis. 



Montana, Washington, Oregon, Prince Edward Island; Europe, 

 Japan. 



19. Cribraria rubiginosa Fr. 



Syst. Myc. 3 : 172. 1829. 



Sporangia gregarious, usually in large colonies, erect, stipitate, 

 elliptical, dull crimson or metallic bronze, 1-1.5 mm. in diameter; 

 calyculus occupying about one-half of the sporangium, the exterior 

 studded with small, ruby red plasmodic granules; the margin serrate; 

 net arising irregularly from the margin of the calyculus, with large 

 meshes; nodes somewhat expanded, dull red, not thickened nor gran- 

 ular ; free ends few, arising from the broad threads ; hypothallus brown- 

 ish red, well developed, common to a group of sporangia; stipe very 

 variable in length, dark red to purple-brown, rather stout; spore-mass 

 reddish brown; spores by transmitted light dull ruby red, with bright 

 red granules within, minutely warted, 5-6 /jl. Plasmodium purple- 

 black. 



Distinguished by the large, dull red sporangia, the irregularly 

 branching net, and the spores with granules within. Unusually long- 

 stalked forms have been named var. longipes Meylan (Bull. Soc. Vaud. 

 44 : 294, 1908). Brandza (1929, p. 274) points out that these are more 

 iridescent, that the granules are differently disposed on the peridium 

 and that the spores are slightly smaller. He believes it should be 

 regarded as a distinct species for which he suggests the name C. meylani. 



On coniferous wood. Europe. 



20. Cribraria ferruginea Meylan 



Ann. Cons. Bot. Geneve 16 : 319. 1913. 



Sporangia gregarious, subglobose, 1-1.5 mm. in diameter, on a 

 membranous hypothallus; calyculus poorly denned, marked by broad, 



