212 Mycetozoa of North America 



cushions 1 to 15 cm. long; sporangial wall membranous, pale 

 rufous-brown, marked on the inner side with scattered warts or 

 papillae, and often with hollow, pouch-like protuberances. 

 Spores pale rufous-brown, closely and minutely reticulate over 

 two thirds of the surface, the remaining part nearly smooth or 

 marked with broken ridges, 5-8 fx diam. (Plate 12, fig. 6.) 



Type locality: Germany. 



Habitat: On dead wood. 



Distribution: Common and abundant throughout North 

 America. 



Illustration: Lister, Mycetozoa ed. 3. pi. 150, figs. a-c. 



The Plasmodium often separates into many small portions 

 forming numerous small clusters of sporangia connected only 

 at the bases, and nearly free. The spongy hypothallus may be 

 absent below these clusters, and is observed to best advantage 

 in the large and high aethalia-like cushions, where it may be 

 elevated above the wood with an empty space between, and the 

 attachment of the aethalium at the edge. Frayed strands, as 

 well as hollow processes, may be seen, sometimes in the sporangia. 

 Rudimentary pseudo-columellae, occasionally present, connect 

 the species with T. Casparyi. Altogether T. ferriiginosa is a 

 remarkable species, and deserves extensive collection and study 

 in all its phases. It is common throughout the season. 



2. Tubifera stipitata (Berk. & Rav.) Macbr. N. A. Slime-Moulds 

 157. 1899. 



Licea stipitaia Berk. & Rav.; Berk. & Curt. Proc. Am. Acad. Arts & Sc. 4: 

 ^125. 1859. 



Plasmodium as in T. ferruginosa. Sporangia similar in size, 

 shape, color, and spores to T. ferruginosa, but in small groups 

 clustered on a dark brown spongy hypothallus, which has the 

 form of a stout stalk, 2 to 5 mm. high. Spores usually more 

 constant in size, about 5 n diam., occasionally smaller. 



Type locality: South Carolina. 



Habitat: On dead wood. 



Distribution: Bermuda, *Canal Zone, Florida, Jamaica, 

 Kansas, *Missouri, New York, Ohio, *Ontario, Pennsylvania, 

 *South Carolina, *South Dakota, *Wisconsin. 



Illustration: Lister, Mycetozoa ed. 3. pi. 150, figs. d-e. 



