44 MYXOMYCETES. 



49. Lepidoderma tigrinum. 



Sporangia hemispherical, flattened, or lenticular, black, varie- 

 gated with vitreous straw-coloured scales, strongly umbilicate 

 beneath, stipitate ; stem rigid, thick, reddish ferruginous, either 

 tall, equal in thickness, or short, imperceptibly widened above ; 

 columella brown, either hemispherical, convex, or almost globose; 

 threads of the capillitium simple, dull-violet, without thickenings ; 

 spores dull-violet, very spinulose, -01- P 0125 mm. diam. Rtfki. 

 Hon., 187. 



On decayed wood, moss, &c. (Fig. 159, 160.) 



Didymium tigrinwn, Schrad., t. 6, f. 2-3 (1797) ; B. & Br. 

 N. H., No. 383; Cooke Hdbk., No. 1121. 



Physarum tigrinwn, Pers. Syn., 174 (1801) ; Fl. Dan., t. 1434, f. 2. 



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



Tricliia tigrina, Poir, Ency., viii., 53. 



Tri chia squamulosa,lPoir. Ency., viii., 53. 



Cionium tigrinwn, Lk. Hdbk., iii., 410 (1833). 



Didymium rufipes, Fr. S. M., iii., 116 (1829). 



Leangium squamulosum, Fr. Stirp. Femsj., 13 (1825). 



t 



Family 5. SPUMARIACEJI;. 



^Ethalium or sporangium provided with a central columella; 

 capillitium extending in a radial manner from the columella to 

 the walls of the sporangium, the threads combined into a net, with 

 polygonal meshes. Rtjki. Mon., 189. 



Genus 15. DXACHJEA. Fr. 



Sporangium stipitate ; stem prolonged within the sporangium as 

 a columella, and, together with it, filled with small granules of 

 lime; capillitium of threads extending from the rigid columella to 

 the wall of the sporangium, becoming thinner and thinner, com- 

 bined into a thick net. Etjki. Mon., 190. 



50. Diachaea leucopoda. (Bull.) 



Sporangia cylindrical, obtuse, stipitate; stem short, thickened at 

 the base, snow-white, prolonged within the sporangium into a 

 cylindrical, obtuse, not reaching the apex, snow-white columella ; 

 threads of the capillitium whitish, thin ; spores translucent, 

 violet, beautifully iridescent. Rtfki. Mon., 190. 



On leaves, &c. (Fig. 178.) 



TricJiia leucopoda, Bull, t. 502, f. 2 (1791). 

 Stemonitis elegans, Trent, in Roth Cat., 2iO (1797). 

 Stemonitis leucostyla, Pers. Syn., 186 (1801). 



