FULIGO 21 



d. Cortex thin, fragile, not calcareous, grayish or brownish, 



often wanting; spores 11-13 /i, nearly smooth 4. F. intermedia 



d. Cortex thick, spongy, calcareous; spores 15 y. or over, 



rough-tuberculate 5. F. megaspora 



1. Fuligo cinerea (Schw.) Morg. 



Jour. Cin. Soc. Nat. Hist. 19 : 33. 1896. 

 PI. I, Fig. 11. 



1832. Enteridium cinereum Schw., Trans. Am. Phil. Soc. II. 4 : 261. 



1832. Lachnobolus cinereus Schw., Trans. Am. Phil. Soc. II. 4 : 261. 



1875. Badhamia coadnata Rost., Mon. 146. 



1876. Physarum ellipsosporum Rost., Mon. App. 10. 

 1885. jEthaliopsis stercoriformis Zopf, Pilzthiere 150. 



. 1887. Fuligo stercoriformis (Zopf) Racib., Hedwigia 26 : 111. 

 1894. Fuligo ellipsospora (Rost.) Lister, Mycetozoa 67. 



Fructification usually more or less plasmodiocarpous, long, widely- 

 effused, thin, applanate, often reticulate, from a few millimeters to 

 2-3 centimeters in extent; cortex white, firm, membranous, but rather 

 thick; capillitium well developed, with large and irregular calcareous 

 nodules; spores filaceous brown, elliptical, subspherical or spherical, 

 rather coarsely spinulose, 14-16 X 11-12 ju. Plasmodium milk-white, 

 watery, changing to cinereous. 



In shaded situations on piles of rotting straw or manure, or on de- 

 tritus in the woods, especially that of bracken. Some of the spores 

 are nearly or quite spherical but the majority are elliptical. Rostafinski 

 called it first a badhamia, then a physarum; Zopf founded for it a 

 new genus yEthaliopsis. Recent students are agreed that it is better 

 included in Fuligo. Large, gray, pulvinate forms with small spherical 

 spores are often found in herbaria labelled F. cinerea but usually prove, 

 on examination, to be F. septica var. Candida. 



Not common in eastern North America, but extremely common in 

 the coniferous forests of the northwest. Occurring also in Europe, 

 Asia, Africa. 



2. Fuligo muscorum Alb. 6 s Schw. 



Consp. Fung. 86. 1805. 

 PI. I, Figs. 9, 10. 

 1809. Lignidium griseoflavum Link, Mag. Ges. Nat. Fr. Berl. 3 : 24. 

 1817. Lignidium muscicola Fr., Symb. Gast. 10. 

 1829. Reticularia muscorum (Alb. & Schw.) Fr., Syst. Myc. 3 : 91. 



1875. Physarum gyrosum Rost., Mon. Ill, in part. 



1876. Licea ochracea Peck, Rept. N. Y. State Mus. 28 : 55. 

 1879. Fuligo ochracea Peck, Rept. N. Y. State Mus. 31 : 56. 

 1879. Fuligo simulans Karst, Bidr. Kann. Finl. Nat. 31 : 108. 



1888. Physarum muscorum (A. & S.) Berl., in Saccardo, Syll. Fung. 7 : 346. 



