206 A Monograph of the Myxogastres. 



Didcrma jyhysarioides, Schum., Herb. 

 Diderma depressum, Fr., S. M., iii., 108 (1829). 

 Diderma lentimlare, Wallr,, Herb. 

 Didymium Miclidii, Lib., Exs. ii., ISO (1832). 

 Didymium hcmisjjhericum, Berk,, Engl. Fl., v., p. 312 (1836); 

 Cke., Hdbk., No. 1119. 



Chondrioderma globosum, Rost. 



Sporangia globose, seated on a broad or narrow base, hypoihallus 

 dronfjly devdojyed, chalk-white, containing much lime, outer wall 

 thick, white, at length irregularly ruptured ; inner wall cine- 

 reous, often iridescent ; columella ivhite, small, globose or 

 ellipsoid ; threads of capillitium bright violet, sometimes almost 

 colourless, forming a dense net ; spores lilac with tinge of 

 brown, mimttely tvartcd, 8 — 10 /x diameter. 



Chondrioderma globosum, Rost., Mon., p. 180, fig. 138; Cooke, 

 Myx. Brit., p. 39, 40, fig. 138; Schroeter, p. 370; Sacc, Syll., 

 n. 1278. 



On leaves, twigs, &c. Britain (Norths) ; France ; Germany ; 

 Belgium ; Italy ; U. States. 



Sporangia often subangular from mutual pressure, f — 1 mm. 

 diameter. Columella pure white. 



(Rostafinski's Synonyms.) 



Mucilage, 7, Mich., t. 96, f. 6 (1729). 



Lycogala, Hall, n. 2143 (1763). 



Rctictdaria sj)haeroidalis, Bull., 446, f. 2 (1791). 



Diderma glohosum, Pers. Disp., t. 1, f. 4, 5 (1797) ; Eng. Fl., 



v., p. 312; Cke., Hdbk., 1114. 

 Didymium candidum, Schrad., Nov. Gen., 25 (1797). 

 Didymium glohosum, Chev., Fl. Par., t. 9, f. 28 (1827). 

 Physarum sjjhaeroides, Chev., Fl. Par., 339 (1827). 

 Gionium glohosum, Spr., iv., 529 (1827). 



Chondrioderma niveum, Rost. (figs. 89 — 91). 

 Sporangia sessile, hemispherical, elliptical or irregular from 



