184 THE MYXOMYCETES OF P1CTOU COUNTY. MOORE. 



5. Physarum virescens Ditmar. Plasmodium lemon color. 

 Sporangia clustered in heaps, greenish yellow in color, sessile 

 or very short stipitate. The aggregate habit gives rise to con- 

 siderable irregularity and frequently sporangia fuse together. 

 When regular they are obovoid or spherical in shape and about 

 .2 mm broad. The yellow color of the peridium is due to small 

 lime granules. Capillitium rather scanty, the hyaline threads- 

 delicate, the lime knots fusiform or irregular in shape, yellow 

 or orange yellow in color. Spores violet brown by transmitted 

 light, delicately warted, 7 9. 5 ft in diameter. 1 



On moss. 



6. Physarum cinereum (Batsch) Pers. Sporangia small,, 

 about one-third of a millimetre in diameter, sessile, closely 

 crowded and superimposed covering considerable areas. They 

 are frequently irregular and contorted. The peridium is mem- 

 branous, grey in color from numerous included lime granules; 

 in old fructifications, when many of the sporangia have split 

 cpen, this color may be concealed by the purple brown of the 

 spores in mass. Oapillitium dense witih irregular, angular and 

 branching white lime knots which are frequently confluent. 

 The hyaline threads are short. Spores violet brown by trans- 

 mitted light almost smooth, 10 11.5 ft in diameter. 



Found fruiting on moss and blades of grass, sometimes com- 

 pletely covering these with its heaped sporangia ; also on decay- 

 ing wood. 



7. PJiysarum globuliferum (Bull.) Pers. Plasmodium pale 

 lavender in color. Sporangia stipitate, erect, spherical, about 

 .45 mm in diameter, wjhite from encrusting lime granules. Stipe 

 white, brittle, tapering upward about .9 mm in length. Columella 

 not evident. Capillitium abundant and delicate, the lime knots 

 small, white. Spores violet tinted by transmitted light,, almost 

 smooth, 8/>t in diameter. They show in this species a tendency 

 to adhere in clusters. 



On decaying Abies balsamea. l^ot common. 



