Physarum. 283 



dense, nodes few, large, angularly stellate, filled with colourless 

 granules of lime, internodes elongated, slender; spores dirty 

 lilac, globose, very minutely verruculose, 15 16 jx diameter. 

 (Type in Herb., Kew.) 



On wood. Melbourne. 



Scattered ; 2'5 3 mm. high ; allied to Physarum leucophaeum, 

 but quite distinct in the larger spores, thicker, equal stem, and 

 in the large well-developed nodes of the capillitium. 



Physarum polymorphum, Rostf.f o\y<s<^ 



Gregarious, stipitate, rarely sessile, sporangia compressed, grey, 

 simple or more or less confluent, obovate, obcordate or lenti- 

 form, margin lobed or waved ; stem filiform, subulate, or several 

 confluent and forming a membranaceous, sulcate cone, yellowish ; 

 threads of capillitium forming an irregular network, white, here 

 and there with angular dilatations ; spores subglobose, violet- 

 brown, spinulose, 9 11 /* diameter. 



Physarum polymorphum, Host., Hon., p. 107; Sacc., Syll., 

 vii., 1, n. 1196. 



On bark. Cuba ; United States. 



Sporangia variable in form, often confluent, dark grey, trun- 

 cate ; stem, subulate, strongly longitudinally wrinkled, yellowish- 

 pink, rarely simple, usually fasciculate, curved or procumbent ; 

 eapillitium strongly developed with angularly-globose dilatations 

 containing lime (Sacc., Syll., I.e.). Unknown to me. 



(Rostafinski's Synonyms.) 



Didymium polycephalum, Mout., Ann. Sci. Nat., p. 361 ; Syll., 



n. 1074 (1873). 



Didymium luteo-griseum, B. and C., Grev., p. 65 (1873). 

 Didymium polycephalum, Rav., cfr. Grev., p. 53 (1873). 



Physarum affine, Rost. 



Sporangia spherico-depressed or subreniform, white; stem 

 snow-white, opaque, about equal in length to the sporangium ; 



