MYXOMYCETES. 67 



Genii* 36. HE3YZIARCYIIIA. 7?. 



Tubes of the capillitium combined into a net, which is either 

 free, or by means of its lower arms sunk in the midst of the con- 

 tents of the tube of the stem. Rtfki. Mon., 261. 



80. Hemiarcyria rubifozmis. (Pers.) 



Sporangia usually fasciculate, collected in a short coalescing 

 stem, often of a beautiful metallic lustre ; mass of spores and net 

 of elaters brownish-red; tubes of the elaters 0042-*005 mm., very 

 rarely branch ing, but not with numerous arms which terminate in 

 free ends, either not distinctly narrowed, smooth, or swollen, and 

 then provided with a short spine, or more rarely obtuse ; spirals 

 two to four, usually three, flat, when matured armed with numerous 

 spines, separated by depressions twice as broad as the spirals; 

 spores 'Ol-'OllG mm. diam., with a stout but smooth membrane. 

 Rtfki. Mon., 262. 



On dead wood. (Fig. 201, 230, 231.) 



a. genuina. 



Sporangia cylmdrico-turbinate, with a steel lustre or 

 opaque, dark brown, stems in fascicles, distinctly connate, 

 rusty- brown. 



p. Neesiana. 



Sporangia cylindrical, in the upper part a little swollen and 

 rounded, of a steel lustre, shining black, or dark-brown, 

 without a stem, growing together on a common hypothallus. 



y. tubulina. 



Sporangia collected in groups, angular by mutual pressure, 

 connate amongst themselves, slightly convex at the apex, 

 entirely without stem, with a steel lustre or dark brown. 



8 plasmcdiocaxpia. 



Plasmodiocarp with an irregular form, the wide base grown 

 to a rounded hypothallus. 



ClatJiroidcs pyri forme, Hall, t. i., f. 5 (1742). 

 Trichia, Hall, t. 48, f. 5, No. 2167 (1798). ' 

 Lycoperdon vesparium, Batsch, t. 30, f. 172 (1786). 

 Stemonitis cinnabar in a, Roth. Fl. Germ., 347 (1788). 

 Lycoperdon favaceum, Schr. Fl. Bav., ii., 667 (1789). 

 Trichia pyriformis, Hoffm. Y. Cr., t. i., f. 1 (1790). 

 Stemonitis fasciculata, Pers. in Gmel. Sys., 1468 (1791). 

 Stemonitis vespuria, Gmel. Sys., 1070 (1791). 

 Trichia rublformis, Pers. Disp., t. i., f. 3, t. iv., f. 3 (1797) ; 

 Berk. Ann. N. H., No. 218; Cooke Hdbk., No. 1177. 

 Trichia rubiformis, (3 minor, Pers. Disp., 54 (1797). 

 Lycoperdon ferrugineum, Hedw., t. x., f. 1-4 (1802). 



