Physarum. . 305 



much lime, rough, dirty ochraceous, breaking away irregularly, 

 inner membranaceous, grey ; columella absent ; mass of spores 

 blackish-violet ; capillitium rather dense, flaccid, threads colour- 

 less, 2*5 3 ft thick, irregularly anastomosing, nodes distant, 

 irregularly globose, filled with colourless granules of lime ; spores 

 globose, dusky violet, coarsely warted, 11 13 /u, diameter. 



Diderma conglomeratum, Fries, Syst. Myc., iii., p. Ill (not 

 Physarum conglomeratum of Host., Mon., f. 90 ; Cke., Brit. Myx., 

 f. 90; Sacc., Syll:, v., 7, n. 1184). 



(Specimen from Fries in Herb. Berk., Kew.) 



On bark. Britain (King's Cliffe) ; Sweden. 



Sporangia about '5 mm. diameter. Capillitium consisting of 

 long, thin, anastomosing internodes, nodes distant, subglobose, 

 without tapering rays, but giving origin at once to the thin, 

 empty, flaccid internodes. 



The above description is compiled from a specimen sent by 

 Fries to Berkeley, and marked in Fries' handwriting, " Diderma 

 conglomeratum, Fries, Suec. Lindberg." The specimen is now 

 in the Berkeley collection in the Kew Herbarium. From the 

 above it will be seen that Rostafmski's Physarum conglomeratum, 

 which he considers to be the Diderma conglomeratum of Fries, 

 is not that species at all, hence synonyms have not been given. 

 I am not acquainted with a species corresponding to Rostafinski's 

 description. 



Physarum sinuosum, Rost. (figs. 292, 



Plasrnodiocarp laterally compressed, elongated, flexuous, or 

 irregularly anastomosing, white or yellowish, usually dehiscing by 

 a split along the upper, free margin, wall double, the outer 

 mostly converted into lime, brittle, the inner without lime, 

 grey ; capillitium dense, knots containing lime large, numerous, 

 connected by short, thin portions; spores globose, brownish- 

 violet, variously but always wry minutely verruculose, 8 9 //. 

 diameter. 



Physarum sinuosum, Rost., Mon., p. 112, f. 91 ; Cooke, Brit. 

 Myx., p. 14, f. 91 ; Sacc., Syll., n. 1198 (Excl. Syn. Diderma 

 pallidum, B. and C.). 



