76 THE MYXOMYCETES 



columella none; capillitium lax, delicate, lilac, the nodules few, large, 

 purple-red, branching; spores reddish lilac or brown, minutely spin- 

 ulose, 7-10 n. Plasmodium rose-red. 

 Reported from Africa, Ceylon, Java, Borneo, Japan. 



51. Physarum psittacinum Ditm. 



in Sturm, Deutsch. Fl. Pilze 3 : 125. 1817. 

 PI. V, Figs. 96, 97. 



1889. Physarum carlylei Massee, Grev. 17 : 56. 



Sporangia scattered or gregarious, globose, depressed-globose, or 

 reniform; iridescent-blue or bronze, mottled with various tints, red, 

 orange, yellow, white; stipitate, stipe equal, or tapering slightly up- 

 ward, rugose, orange or orange-red, without lime, rising from a small 

 concolorous hypothallus; columella none; capillitium dense, crowded 

 with calcareous, brilliant orange nodules which are angular in outline 

 and tend to aggregate at the center of the sporangium; spore-mass 

 brown; spores by transmitted light pale brown, slightly but plainly 

 warted, 8-10 fx. Plasmodium orange-red. 



Differs from P. pulcherripes Pk. in external coloration, the peridium 

 being blue or bronze, mottled, but not with lime; in the capillitium, 

 dense, calcareous, with large angular or branching nodes; in the stipe, 

 without lime; in the spores, a little larger than in P. pulcherripes, 

 and by transmitted light much more distinctly brown in color. The 

 sporangia are also broader in the present species, reaching 1 mm. 



The variety fulvum Lister, reported from Iowa, Ceylon, Malay 

 Peninsula and Japan, has the lower part of the sporangium and the 

 stipe fulvous yellow instead of red or orange. 



Rare. Maine, New Hampshire, New York, Massachusetts, Penn- 

 sylvania, West Virginia. Reported common in Europe, Japan. 



52. Physarum leucopus Link 



Mag. Ges. Nat. Fr. Berl. 3 : 27. 1809. 

 PI. V, Fig. 100. 



1809. Physarum bullatum Lk., Mag. Ges. Nat. Fr. Berl. 3 : 27. 1809. 

 1829. Didymium leucopus (Lk.) Fr., Syst. Myc. 3 : 121. 



Sporangia gregarious, stipitate, globose, 0.5 mm. in diameter, snow- 

 white, with a didymium-like covering of calcareous particles; stipe 

 white, not long, conical or tapering rapidly upward, slightly sulcate, 

 brittle, from an evanescent hypothallus; columella none or small; 

 capillitium, consisting of rather long hyaline threads, connecting the 

 usual calcareous nodes, which are large, angular, snow-white; spore- 



