280 A Monograph of the Myxogastres. 



angular, internodes rather long, thin ; spores globose, pale lilac, 

 very minutely verruculose, 10 p. diameter. 



Physarum Jlavum, Fr., Sym. Gast., p. 22; Rost., Mon., p. 100; 

 Sacc., Syll., vii., 1, n. 1186. 



(The above description drawn up from a specimen named by 

 Fries.) 



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



Usually growing on living mosses, scattered, 1'5 2 mm. 

 high; stem stout. Very closely allied to Physarum Ditmari, 

 Host., of which the present may possibly prove to be a stipitate 

 form ; however, in the absence of such evidence, it is well for 

 the present to retain it as a species. 



(Rostafinski's Synonyms.) 



Physarum Jlavum, Fr., Symb. Gast., p. 22, I.e., iii., p. 135 



(1818). 



Physarum citrinella, Fries, in Herb. ; Kunze. 

 Cratcrium Jlavum, Fr., Sm. Veg. Sc., p. 454 (18491). 



Physarum Schroeteri, Rost. \. : ' 



Sporangia stipitate, hemispherical, depressed ; stem conical, 

 thick, golden, shining, continued as an obtusely conical columella ; 

 threads of capillitium slender, combined to form a dense net- 

 work, furnished with nodes containing lime; spores spinulose, 

 blackish-brown, 10 12 p diameter. 



Physarum Schroeteri, Rost., Mon. App. I., p. 419; Karst., 

 Myc. Fenn., iv., p. 102; Sacc., Syll., vii., 1, n. 1172. 



On leaves and twigs of Alnus. Finland. 



Physarum brunneolum, Phillips (figs. 221, 222). N 



Scattered or gregarious, but not crowded, sessile ; sporangia 

 globose or subdepressed, wall single, thick, smooth and polished, 

 Irifjlit ^yellow-brown, dehiscing in a stellate manner, the segments 

 becoming rcftexed, snow-white inside; columella absent; capil- 

 litium very 4ense, snow-white, nodes very large and numerous, 



