Physarum. 307 



lime; spores globose, dull violet, very minutely verruculose, 

 9 11 /ix. diameter. 



On wood and soil in a pot of palm-seeds from Java. Palm 

 House, Kew. 



Contorted and forming a brain-like mass from '5 4 cm. 

 across, very friable. The present species connects the genera 

 Physarum and Fuligo, if indeed the letter be anything more 

 than an aethalioid condition of the former. 



Physarum gyrosum, Rost. 



Sporangia vermiform, sinuous, or variously anastomosing to 

 form an irregular network, often forming more or less regular 

 closed circles, wall double, outer very thin and delicate, inner 

 thicker, rigid with granules of lime, varying from rusty-orange, 

 through dull ochre to pale yellow, dehiscing in an irregular 

 manner, capillitium fairly abundant, nodes large, angular, con- 

 taining yellow or white granules of lime, internodes thin ; spores 

 dingy violet, 11 12 /A diameter, minutely warted, globose. 



Physarum gyrosum, Rost., Mon., p. 111. 



Physarum muscorum, Sacc., Syll, vii., 1, 1197. , 



Exsicc. Ellis, N. Amer. Fung., 1396. 



On leaves, mosses, &c. Britain (Carlisle); Germany; Sweden; 

 France ; Portugal ; United States. 



Variable in size, the large reticulations often extending up 

 to 1 cm. diameter. Superficially closely resembling Ceinkowskia 

 reticulata. 



(Rostafinski's Synonyms.) 



Fuligo muscorum, A. and Sz., l.c., p. 86, t. 7, f. 1 (1805). 

 Lignidium griseo-Jlavum, Link, Obs., i., p. 24, t. 2, f. 37; 



Nees, Syst., f. 95 (1809). 



Lignidium muscicola, Fr., Sym. Gast., p. 10 (1817). 

 Lignidium reniforme, Fr., Sym. Gast., f. 10 (1817). 

 Reticularia muscorum, Fr., I.e., iii., p. 91 (1829). 

 Physarum sinuosum, Wein., in Fr., I.e., iii., p. 145; Excl. 



sinom. Non. Auc. (1829). 



