Physarum. 311 



Physarum luteo-valve, Schweinitz, Syn., Fung. Amer. Borealis, 

 n. 2298; Sacc., Syll., vii., 1, n. 1218. 

 On fallen twigs. Carolina.- 



Physarum sulphureum, Rost. 



Sporangia spherical, rugoso-squamulose, sulphur-coloured ; stem 

 smooth, short, white, tapering from the incrassated base in an 

 exactly conical manner, about equal in length to the sporangium 

 or slightly longer; capillitium threads yellow; spores blackish - 

 violet, 10 12 ju, diameter. 



Physarum sulphureum, Rost., Mon., p. 101 ; Sacc., Syll., vii., 

 1, n. 1187. 



On dry fallen leaves. Germany ; Russia. 



(Rostafinski's Synonyms.) 



Physarum sulphureum, A. et Sz., I.e., n. 259, t. 6, f. 1 (1805). 

 Physarum virescens, Fuckel, Syst. Myc., p. 343; non Ditm. 

 (1869). 



Physarum Schweinitzii, Berk. OV<\ 



Gregarious, shining, yellow ; the few capillitium threads and 

 globose granulated spores the same colour, about 16 //. diameter, 

 sometimes rather irregular. 



Physarum Schweinitzii, Berk., Grev., vol. ii., p. 66 ; Sacc., 

 Syll, vii., 1, n. 1225. 



Polyangium vitellinum, Schweinitz (according to Berkeley). 



On vegetable fragments. Bethlehem, U. S. (Schweinitz.) 



Berkeley has probably at some time had a specimen from 

 Schweinitz's Herbarium, but no such specimen exists in 

 Berkeley's Herbarium, consequently I am not able to determine 

 the nature of the specimen those authors had in view. 



Physarum caespitosum, Sz. P. c.\Trv>e\\v 



Substipitate or at least contracted at the base, caespitose or 

 scattered ; sporangia close packed, turbinate, obovate, base con- 

 tracted, exterior membrane with yellow squamules or rough 



