Didymiam. 221 



is three times as long as the height of the sporangium, in 

 others so short as not to project beyond the umbilicus or 

 depression at the base of the sporangium. The threads of the 

 capillitium are often flexuous. The cokimella is at first dusky 

 owing to being covered with the dark inner skin of the spor- 

 angium, but in old plants this pellicle frequently disappears, 

 leaving a white mass of lime, hence the columella appears 

 white. 



(Rostafinski's Synonyms.) 



S'phacroccplmlus nigcr. Hall, t. 1, f. 2 (1742). 



Trkhia, Hall, No. 2160, t. 48, f. 2 (1768). 



M'ucor si^hacrocephcdus, Batsch., p. 157 (1783). 



Clathrus S2Jhaerocc2)hahcs, .'Rehl. (1786). 



Trichia glohosa, Vill., Fl. Dauph., 1061 (1789). 



Beticularia Jicmisj^herica, Bull., t. 446, f. 1 (1791). 



Trichia cojnjrressa, Trent, p. 229 (1797). 



Trichia sj)hacrica, Trent, p. 230 (1797). 



Trichia dcpressa, Trent, p. 231 (1797). 



Physarum mclanosjyervuwi, Pers. Disp., p. 8 (1797). 



Lidymium farinacmm, Schrad., t. 3, f. 6 (1797) ; Engl. Flor., 



v., 313; Cooke, Hdbk., No. 1123; Fung. Brit., Ed. H., 521.' 

 Trichia sphacrocei^hala, Sow., t. 240 (1799). 

 Trichia farinacca, Poir., EncycL, viii., 53. 

 Physarum farinacmtm, Pers. Syn., 174 (1801). 

 Physarum cinerasccns, Schum. Saell., 1426 (1803). 

 Physarum dextrcssttm, Schum. Saell., 1439 (1803). 

 Physarum glohosiwi, -Schum. Saell., 1442 (1803). 

 Physarum oxyacanthae, Schum. Saell., 1427 (1803). 

 Physarum cinercum, multis ? 

 Physarum clavus, Link, Diss., i., 27 (1809). 

 Physarum sinuosum, Link, Diss., i., 27 (1809), 

 Physarum capikchirn, Link, Diss., i., 27 (1809). 

 Diderma muscicola., Link, Diss., i., 27 (1809). 

 Bidymiuiii ca2ntcdum, Link, Diss., iii., 27 (1816). 

 Didymium lokdiim, Nces, f. 104 (1817); Cooke, Hdbk No 



1129. 



