Arcyria. 151 



(Rostafinski's Synonyms.) 



Clathroidcs flavescens, Mich., p. 214 (1729). 



Clathroides longissimum, Hall, p. 10 (1742). 



Clathms ramosus, /3. Retz. Vet. Handl., 253 (1769). 



Trichia nutans, Bull., t. 502, f. 3 (1798) ; Sow., t. 260. 



Stemonitis nutans, Gmel., Sys., 1467 (1791). 



Arcyria flava, Pers. Obs., i., 85 (1796) ; Grev., t. 309. 



Stemonitcs amaena, Trent., p. 222 (1797). 



Trichia elongata, Schum. Saell., 1464 (1803). 



Arcyria alutacea, Schum. Saell., 1474 (1803). 



Arcyria nutans, Grev. Fl. Ed., p. 455 (1824); Eng. Fl., v., 



319 ; Cooke, Hdbk., No. 1173. 

 Arcyria pattens, Wallr. in litt. 



Arcyria straminea, Wallr. Crypt. Germ., 2232 (1833). 

 Arcyria nutans, c, minor, Bong., in Weinm, p. 609 (1836). 



Arcyria cinera, Mass. (figs. 137139, and 248, 249). 



Sporangia varying from globose to cylindrical, stipitate, 

 simple or digitate-fasciculate on a common stem, wall thin, 

 smooth, grey, or yellowish, cup-like base persistent after de- 

 hiscence ; stem slender, about equal in length to sporangium or 

 longer, straight, colour of sporangium, filled with large cells 

 that become smaller upwards; mass of capillitium and spores 

 yellowish-grey or grey ; capillitium dense, protruding elastically, 

 and remaining erect, threads combined to form an irregular 

 network, variable in thickness, often smooth or minutely warted 

 towards the base, the remainder equally covered with close-set 

 short spines, or half-rings or spines arranged in a diffuse spiral ; 

 spores globose, smooth, rarely minutely granular, 79 /x diameter. 



Arcyria cinerea, Rost., Mon., p. 272, figs. 182 185, 193 ; 

 Cooke, Myx. Brit., p. 71, figs. 182185, 193; Sacc., Syll., vii., 

 1, n. 1459. 



Arcyria ' pomifoi-mis, Rost., Mon., p. 271; Cke., Myx. Brit., 

 p. 70. 



Arcyria stricta, Rost., Mon. Supp., p. 71. 



