Physarum. 277 



Physarum aureum, /3. chryfiopns, Lev., Ann. Sc. Nat. (184G), 



p. 166. 

 Physarum Jlavum, Fckl., Syn., p. 343 (1869). 

 Bidyviium meUciim, B. and C, Ceyl. Fung., 751. 

 Didymium chrysopc^^bim, B. and Br., N. A. Fung., 348. 



Physarum virescens, Ditm. 



Sporangia stipitate, sessile and crowded, an irregular plas- 

 modiocarp, or an effused aethalium, wall rough, yellow, with 

 green or olive tints, stem when present yellow, wrinkled, equal 

 to or shorter than the sporangium ; columella absent ; cajnl- 

 litium scanty, knots of lime few, small; spores globose, dingy 

 lilac, very minutely verruculose, 7 — 9 /x diameter. 



Physarum virescens, Ditm., in Sturm, t. 61 ; Rost., Mon., p. 103 ; 

 Cooke, Brit. Myx., p. 13 ; Sacc, Syll., n. 1183 ; Schroeter, p. 128. 



Physarum thej'oteum, Fr., Gast., p. 21. 



Physarum Ditmari, Rost., Mon. Append., p. 13. 



Didymi'itm crocco-fiavium, B. and Br., Fung. Ceylon, n. 757. 



Exsicc. — Fckl., F. Rhen., 1460 (as Physarum anccps, de By). 



a. gcmtinum.. Sporangia sessile on a broad base, crowded, 

 rarely scattered. 



/3. siipitatum. Sporangia stipitate, stem stout, longitudinally 

 wrinkled, yellow. 



y. confiuens. Sporangia sessile, plasmodiocarp or confluent, 

 and forming a cake-like aethalium. 



On leaves, moss, &c. Britain (Chiselhurst, Bristol, N. Wales, 

 Carlisle) ; Sweden ; Germany ; Madras ; Ceylon ; United States. 



Usually sessile and crowded, sporangia subaugular from 

 mutual pressure, varying i'rom clear yellow through olive to 

 greenish-yellow, the last being most frequent, and with the 

 scanty capillitium with very few small knots containing lime, 

 marks the species in all its forms. 



(Rostafinski's Synonyms.) 

 Physarum virescens, Ditm., t. 61 (1817). 

 Physaraiii ihrjotcum, Fr,, Gast., p. 31 (1818). 



