Fhiimrnm. 303 



(Rostafinski's Synonyms.) 

 Physarnm ruhiginosum, Fr., Sym. Gast., p. 21. non Che v. 



(1818). 

 Leangium ruhiginosum, Fr., Stirp. Femsj., p. 83 (1825). 

 Physarum fuhuvi, Fr., I.e., iii., p. 143 (1820). 



Physarum contextum, Rost. (figs. 276 — 283). 



Sporangia sessile on a broad base, crowded, subglobose, reni- 

 form, or elongated and variously interlocked, wall double, outer 

 thick, containing lime, varying from colourless to deep lemon- 

 yellow, inner thin, yellowish; capillitium well developed, with 

 numerous, irregularly Iranched nodes containing lime, usually 

 tinged yellow ; spores globose, brownish-violet, minutely warted, 

 11 — 14 ju diameter. 



Physarum contextum, Rost., Mon., p. 109 ; Cooke, Brit. Myx., 

 p. 13; Raunk., Myx. Dan., p. 73; Sacc, Syll., n. 1185; 

 Schroeter, 130. 



Exsicc.—¥cV\.., Fung. Rhen., 2400 (as Diderma contextum, 

 Pers.) ; Ellis and Everh., N. Amer. Fung., ser. II., 2086. 



On moss, leaves, and bark. Britain (Shore, Kew, King's 

 Cliffe) ; France ; Germany ; United States ; Ceylon. 



In some of its forms resembling Physarum conglomeratum, 

 from which it is known by the denser capillitium of numerous 

 large, irregular knots containing yellow granules of lime, and 

 the larger sporangia usually of a pale lemon-yellow, sometimes 

 with a very faint tinge of green. 



(Rostafinski's Synonyms.) 

 Diderma contextum, Pers., Obs., i., 89 (1796) ; Ditm., t. 39 ; 



Cke., Hdbk., n. 1117. 

 Physarum contextum, Pers., Syn., 168 (1801). 

 Didymium contextum, Fr., Gast., p. 20 (1818). 

 Leocarpus contcxtus, Fr., S. V. S., 450 (1849). 

 Chondrioderma contextum, Rost., in Fckl., Sym. Myc, ii., 74 



(1873). 

 Diderma ochrolcucum, B. and C, Grcv., 343. 



