40 THE NORTH AMERICAN SLIME-MOULDS 



capillitium a large-meshed open network of rather slender tubules, the 

 nodes unequally developed, white with the enclosed lime; spores not 

 strictly adherent though not without some tendency to stick together, 

 delicately warted, bright violet-brown, 10-12 /i. 



This species resembles B. capsulifera, but is distinguished by a more 

 strongly rugulose less calcareous peridium and a more profuse devel- 

 opment of filamentous stipes, but especially by the character of the 

 spores. The spores of the present species while inclined, when mount- 

 ed in a liquid, to stay together, nevertheless do not coalesce in heaps as 

 in the related species, nor do they show any differentiation in the 

 episporic markings, these being uniform over the entire spore. 



This is one of the finest and perhaps the most beautiful species of 

 this fine genus. It is a forest species, generally to be found on trunks 

 of fallen Populus or Tilia where the fine soft gray colonies often 

 spread for several inches along the ridges and in crevices of the bark. 



Colorado {Bethel) ; Mississippi valley and east. 



12. Badhamia capsulifera (Bull.) Berkeley. 



1791. Sphaerocarpus capsulifer Bull., Champ., p. 139, t. 470, Fig. 2. 



1801. Physarmn hyalinum Pers., Syn. Metli. Fung., p. 170. 



1852. Badhamia capsulifera Berk., Tr. Lin. Soc, XXL, p. 153. 



1852. Badhamia hyalina Berk., Tr. Lin. Soc, XXL, p. 153. 



1875. Badhamia hyalina (Pers.) Rost., Mon., p. 139. 



1875. Badhamia capsulifera (Bull.) Rost., Mon., p. 141. 



1894. Badhamia hyalina Lister, Mycetozoa, p. 30. 



1911. Badhamia capsulifera Lister, Mycetozoa, 2nd ed., p. 31. 



Sporangia clustered or gregarious, sessile or sometimes stipitate, 

 globose or obovoid, gray or greenish white, snow-white when empty; 

 the peridium thin, translucent; the stipe, when present, as in B. 

 utricularis, although generally shorter and better developed, yellow 

 or straw colored; capillitium a very loose, open network of white, 

 lime-filled tubules, not much expanded at the nodes; columella none; 

 spore-mass purplish-brown ; spores adhering in clusters of five or six 

 to twenty or more, globose, but affected somewhat by mutual pres- 

 sure, rough throughout, the exposed surface in the cluster, more dis- 

 tinctly warted, 10-12 p.. 



