30 THE MYXOMYCETES 



5. Badhamia populesta Lister 



Jour. Bot. 42 : 129. 1904. 

 PI. I, Fig. 15. 



Sporangia white, sometimes pale rose, subglobose or ovoid, smooth, 

 calcareous, about 1.5 mm. in diameter, sessile and crowded, or rarely 

 solitary on short yellow-brown membranous stipes; capillitial strands 

 broad, calcareous; spores clustered, 16-20 or more in a cluster, purple- 

 brown, warted unequally, one side coarsely, the other faintly, and 

 usually marked by ridges and bands, 10-12 /z. Plasmodium said to be 

 white or cream colored. 



Generally distinguishable by its unusually large, calcareous, white 

 or faintly rose colored sporangia. The peridial walls are shell-like in 

 texture. Very near B. capsulifera, but larger, the sporangia more 

 densely heaped and more calcareous and often with banded spores. 

 Collections from Colorado referred to this species are very near to 

 Iowa collections referred to B. capsulifera. 



Colorado, Montana, Washington; Europe. 



6. Badhamia utricularis (Bull.) Berk. 



Trans. Linn. Soc. 21 : 153. 1852. 

 PI. II, Figs. 22, 23. 



1791. Sphcerocarpus utricularis Bull., Champ. 128. 



1797. Trichia coerula Trentep., in Roth, Cat. Bot. 1 : 229. 



1803. Physarum ovoideum Schum., Enum. PI. Saell. 2 : 198. 



1805. Physarum hyalinum var. chalybcBum Alb. & Schw., Consp. Fung. 92. 



1805. Trichia utricularis (Bull.) DC, Fl. France 2 : 251. 



1821. Trichia rubiformis Purt., non Persoon, in Brit. PI. of Midi. Count. 

 3 :291. 



1825. Physarum botryoides Ft., Stirp. Femsj. 83. 



1826. Physarum utriculare (Bull.) Chev., Fl. Paris 1 : 337. 

 1826. Physarum botrytes Somm., Fl. Lapp. 242. 



1832. Diderma papaverinum Wallr., Fl. Crypt. Germ. 375. 

 1892. Badhamia varia Massee, Mon. 319, in part. 



Sporangia clustered, spherical, ovoid or pyriform, large, 0.7-1.0 mm. 

 in diameter, sessile or mounted on long, thin, strand-like stalks, blue- 

 gray, violet-iridescent or cinereous, smooth or more often rugulose; 

 peridium iridescent, hyaline or white when empty; stipes when present 

 poorly differentiated, thread-like filaments as if representing strands 

 of the Plasmodium, often branched and usually reclining or even 

 prostrate; hypothallus none; capillitium a large-meshed open network 

 of rather slender tubules, the nodes unequally developed, white with 

 the^enclosed lime; spores nearly free although not without some 



