184 THE MVXOMVCETES OF I'KTOU (UUNTV.— JIOUKE. 



5. Pliysarum virescens Ditmav. — ^Plasmodium lemon color. 

 Sporangia clustered in heaps, greenish yellow in color, sessile 

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

 sidcralilf iiTcmilarit v ;iu(l t'i'c(|iu'iitly <|)(ir;iii,ui:i fuse together. 

 \\'licii regular they arc ulidVdiil df splicricnl in shape and about 

 .1'""" broad. The yellnw (•(ihu- uf the peridiuni is due to small 

 lime granules. Capillitiuni 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 — U.5/Ain diameter. 



On moss. 



(). /'Iii/s(iniin cincrciiin (13atsch) Pers. — Sporangia ^^mall, 

 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 fi-oni 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 witlh irregular, angular and 

 branching wdiite lime knots which are frequently confluent. 

 The hyaline threads are short. Spores violet l)rown by trans- 

 mitted light almost smooth, 10 — 11.5 /x in diameter. 



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

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

 ing Avood. 



7. Physarum globulifei'um (Bull.) Pers. — Plasmodium pale 

 lavender in color. Sporangia stipitate, ereet, spherical^ about 

 ATi"""' in diameter, white from encrusting lime granules. Stipe 

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

 not evident. Capillitium abundant and delicate, the lime knots 

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

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

 tot adhere an' clusters. 



On c]oca\\n<j: Ahies haJsamca. Xot common. 



