270 A Monograph of the Myxogastres. 



(Rostafinski's Synonyms.) 



Trichea aurea, Schum., Fl. Saell., 1461 (1803). 

 Craterium mutalile, Fr., I.e., iii., p. 154, non S. Gast. (1829). 

 Cupularia mutabilis, Rab., Fl. Germ., Cr., n. 2225 (1844). 

 Physarum Durieui, M., Herb. 



Craterium rnbiginosum, Mass. (figs. 309, 310). 



Sporangia globose, broadly elliptical, or obovate, stipitate, 

 dehiscing in a more or less regular circumscissile manner, lower 

 portion of sporangium permanent, reddish-brown, often with a 

 purple tinge, lid or apical portion paler, sometimes whitish ; 

 stem about equal in length to sporangium, stout, dark red- 

 brown, passing downwards into a spreading hypothallus; 

 capillitium dense, white, threads aggregated in the centre to form 

 a dark-coloured columclla ; spores dingy violet, globose, minutely 

 warted, warts sometimes more or less arranged in lines, 10 13 n 

 diamercr. 



Badhamia rubiginosa, Host., Mon. App., p. 29 ; Sacc., Syll., 

 vii., n. 1158. 



Scyphium rulriginosum, Rost., Mon., p. 148, fig. 115; Cke., 

 Myx. Brit., p. 29, fig. 115. 



Exsicc. Ellis, N. Amer. Fung., 1215. 



On wood. Britain (Appin, N. B.) ; Germany ; France ; United 

 States. 



Gregarious, 2'5 3 mm. high. 



(Rostafinski's Synonym.) 



Physarwn rubiginosum, Chev., Fl. Par., 338 (1826) ; Eng. Fl., 

 v., 315; Cke., Hdbk., n. 1137. 



Craterium dictyospermum, Mass. (figs. 305, 306). 



Sporangia globose or obovate, dehiscing in a circumscissile 

 manner or irregularly, lower portion of sporangium permanent, 

 reddish-brown, becoming paler or whitish at the apex; stem 

 about equal in length to the sporangium, rather stout, dark 



