Didymium. 235 



(Rostafinski's Synonyms.) 



Lycoperdon complanatum, Batsch, t. 170 (1786). 



Didymium serpula, FT., S. M., in., 126 (1829); Eng. Fl., v., 



314 ; B. and Br., Ann. N. H., No. 1035 ; Cke., Hdbk., 



n. 1134. 

 Physarum confluens, Fckl., Symb. Myc., p. 342 (1869), non 



Pers. 



Didymium confluens, Rost. tj.savav* 



Sporangia sessile, sometimes scattered and then hemispherical, 

 at others densely crowded on a well-developed hypothallus, 

 hemispherical reniform, or irregularly angular from mutual 

 pressure ; columella distinct, yellowish, or with a pink tinge ; 

 threads of capillitium very slender, forked at acute angles, pale 

 brownish-lilac ; spores globose, rather coarsely warted, dingy 

 purple-brown, 10 15 ju diameter. 



Didymium confluens, Rost., Mon., p. 164. 



Didymium crustaceum, Sacc., Syll., no. 1303. 



On leaves, wood, &c. Britain (Castle Howard, Yorks); 

 France; Italy; Russia; Finland. 



(Rostafinski's Synonyms.) 



Didymium complanatum, Schrad., Nov. Plen. Gen., p. 24, t. 5, 



f. 5 (1797). 

 Physarum confluens, Pers. Syn., p. 169, et v., a truncigerum 



(1801). 



Physarum confluens, /3 muscigemlm, A. et Sz., 1. c., p. 9 (1805). 

 Didymium crustaceum, F., 1. c., iii., p. 124 ; Excl. Syn. (1829). 

 Cionium complanatum, Lk. ap. Wallr., 1. c., no. 2176 (1833). 



Var. olducens, Karst., Not. Sallsk., pro. faun, et flor. Fenn., 

 ix., p. 356 (1880). 



Sporangia irregular (plasmodiocarp), flattened, often umbili- 

 cate, concave below, solitary or gregarious, sometimes densely 

 crowded; stem short or almost obsolete, irregular, broadening 

 out below into the common hypothallus. Remainder as in 

 type. 



