Physarum. 283 



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

 granules of lime, internodes elongated, slender; spores dirty 

 lilac, globose, very mimdely verruculose, 15 — 16 ix diameter. 

 (Type in Herb,, Kew.) 



On wood. Melbourne. 



Scattered ; 2o — 3 mm. high ; allied to Fhysarwiii Icucojohaenm, 

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

 in the large well-developed nodes of the capillitium. 



Physarum polymorphum, Rost. 



Gregarious, stipitate, rarely sessile, sporangia coinpressed, grey, 

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

 fomi, 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, sinnulose, 9 — 11 /x diameter. 



Physarum itolymorphum, Host., Mon., 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 ; 

 capillitium strongly developed with angularly-globose dilatations 

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



(Rostafinski's Synonyms.) 

 Didymmm iiolyeephalum, Mout., Ann. Sci. Nat., p. 361 ; Syll, 



n. 1074 (1873). 

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

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



Physarum afiine, Rost. 

 Sporangia spherico-de])ressed or subreniform, ichite ; stem 

 snow-white, opaque, about eipud in length to the s])orangium ; 



