Arcyria. 165 



/3. sessilis. Sporangia sessile on a broad base, scattered or 

 gregarious, capillitium orange, elastic. 



Hemiarcyria serpula, Host, Mon., p. 267, figs. 200, 227, 228 ; 

 Cooke, Myx. Brit., p. 68, figs. 200, 227, 228; Schroeter, p. 115; 

 Sacc., Syll., vii., pt. I., n. 1514 ; Raunk., Myx. Dan., p. 64, t. 3, 

 f. 16 ; Mass., Rev. Trich., p. 357, f. 34. 



Exsicc. Fuckel, Fung. Rhen., 2692 (as Hemitrichia contorta 

 (Ditm.) Host.). 



On rotten wood, branches, leaves, &c. Britain (Carlisle; 

 specimen in Herb. Berk., from Sovverby's herbarium, no locality, 

 called Trichia reticulata, undoubtedly British) ; Germany ; 

 Sweden; Belgium; Italy; United States; Cuba; St. Vincent; 

 Bombay ; N. W. Australia ; New Zealand ; Ceylon. 



Distinguished amongst the clear yellow species by the very 

 spiny elaters and the reticulate spores. The subglobose sessile 

 form has not, so far as I am aware, been met with in Britain, 

 but, although differing in habit and in the bright orange elastic 

 capillitium, agrees in the structure of the elaters and the spores. 

 The type of the form sessilis is in the herbarium of the Paris 

 Museum, and was collected in Cuba. 



(Rostafinski's Synonyms.) 



Mucor serpula, Scop. Fl. Cam., t. 65 (1772). 



Lycoperdon lumbricale, Batsch., f. 174 (1786). 



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



Stcmonitis lumbricalis, Gmel. Sys., 1470 (1791). 



Trichia reticulata, Pers. Disp., 10 (1797) ; Ic. and Desc., 1. 12, f. 1 



Trichia serpula, Pers. Disp., 10 (1797); Eng. FL, v., 320; 



Cooke, Hdbk., 1189. 



Trichia serpula, /3 spongioides, Pers. Syn., 181 (1801). 

 Trichia venosa, Schum. Saell., 1456 (1803). 

 HypOrKamma reticulatum, Corda Ic., v., 34 (1842). 

 Trichia retiformis, Payer. Crypt., f. 574 (1850). 



Arcyria clavata, Mass. (fig. 124). 

 Sporangia varying from clavate to globose, ycllcnvish, polished, 



