150 THE MYXOMYCETES 



thallus very scanty or none; spores distinctly reticulate-warted, violet- 

 brown, paler under the lens, 10-12 /x. Plasmodium yellow. 



Somewhat resembling D. splendens, but duller in hue, more oliva- 

 ceous, usually with a much shorter stalk and almost without columella. 

 The spores are quite different, the network composed of lines of warts, 

 but much more regular than in splendens. 



According to Lister, Lamproderma fuckelianum Rost. is probably 

 this species. Rostafinski's figure suggests that this may be so, but in 

 view of the uncertainty, Peck's name is retained. 



Rare. Connecticut, New York, Iowa, Colorado; Europe, Java, 

 Ceylon. 



6. Diachea thomash Rex 



Proc. Acad. Nat. Sc. Phila. 1892 : 329. 

 PL X, Figs. 233, 234. 



Sporangia gregarious, more or less crowded, purple and bronze, 

 iridescent, globose, sessile or short-stipitate; stipe, when present, very 

 short, thick, tapering rapidly upward, orange; hypo thallus orange, 

 prominently venulose, continuous; columella ochre yellow, rough, 

 cylindric or conical, tapering upward to one-half the height of the 

 sporangium, obtuse; capillitium lax, of slender brown rigid threads, 

 radiating from the columella in every direction, anastomosing to form 

 a loose, large-meshed network; spore-mass brown; spores by trans- 

 mitted light violaceous, minutely, unevenly warted, 11-13 /x. 



The peculiar orange color of the calcareous deposits in stipe and 

 columella easily distinguishes this species. The capillitium is also dis- 

 tinctive, rigid, simple and comparatively scant, lamprodermoid. Rex 

 calls attention to the fact that under low magnification the spores 

 appear spotted; but the spots are occasioned simply by the closer 

 aggregation, at particular points, of the ordinary papillae. 



A southern species. Mountains of North Carolina and Tennessee. 



7. Diachea cerifera G. List. 



Jour. Bot. 51 : 3. 1913. 

 PI. X, Fig. 236. 



1911. Lamproderma columbinum (Pers.) Rost. var. sessile Lister, Mycetozoa 

 ed. 2. 165. 



Sporangia scattered or in small clusters, limeless, stalked, subglobose 

 or ovoid, 0.7-1.2 mm. in diameter, shining iridescent brownish purple; 

 sporangium wall membranous, hyaline, often yellowish and persistent 

 below; stalk brownish black, yellowish brown or white, 0.2-0.6 mm. 



