PHYSARUM 5 1 



which to him was an equivalent of PJiysarum citrinum Schum. 

 P. petersii B. and C. is said to be the same thing, as also 

 P. pulcJiripes Peck. 



New York, Pennsylvania, Ohio. 



30. PHYSARUM PSITTACINUM Ditmar. 



1817. Physarum psittacinum Ditmar, Sturm, Deutsch. Fl. Ptlze, p. 125. 



Sporangia scattered or gregarious, globose or depressed 

 globose, or reniform, iridescent blue, mottled with various tints, 

 red orange, yellow, white, stipitate ; stipe equal or tapering 

 slightly upward, 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 centre of the sporangium ; spore-mass brown ; spores by 

 transmitted light, pale brown, slightly but plainly warted, about 

 10 IJL. N. A. F., 2492. 



Differs from the preceding in external coloration, the perid- 

 ium a rich blue, 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. pul- 

 chripes, and by transmitted light much more distinctly brown in 

 color. The sporangia are also broader in the present species, 

 reaching I mm. 



Rare. Maine, New York, Massachusetts, Pennsylvania. 



3 1 . PHYSARUM NODULOSUM Cooke and Balfour. 



1 88 1. Physaruni noditlosum Cke. and Balfour, Rav. N. A. F., 479. 



1889. Badhamia nodulosa Massee,Jour. Myc., V., p. 186. 



1891. Physarum calidris Lister, Jour. Bot., Vol. XXIX, p. 258. 



1896. Crater him nodiilosum Cke. and Balfour, Morgan, Jour. Cin. Soc., 

 p. 87. 



Sporangia gregarious ; minute, globose, bluish white, the spo- 

 rangial wall thin and more or less encrusted with lime, breaking 

 up irregularly, stipitate ; stipe slender, longer than the sporan- 

 gium, attenuate upward or even, bright brown, rugose, expanded 



