212 THE MYXOMYCETES 



Recognizable by its small size, deep calyculus and peculiar color, 

 that of bright copper, although this fades somewhat with age, and 

 the metallic tints are then lacking. Related to C. languescens and in 

 specimens having globular sporangia closely resembling it; but the 

 ground color in C. languescens is always darker, and in well-developed 

 specimens the stipe proportionally much longer. In habit the spo- 

 rangia are widely scattered, much more than is common in the species 

 of this genus. If one may judge from the material at hand, the favorite 

 habitat is very rotten basswood, Tilia americana. 



Rare. Pennsylvania, Ohio, Iowa, Missouri, Wyoming, Washing- 

 ton. 



9. Cribraria languescens Rex 



Proc. Acad. Nat. Sc. Phila. 1891 : 394. 



Sporangia scattered, very minute, 0.25-0.35 mm. in diameter, spher- 

 ical, long-stipitate, drooping; stipe 2.5-3 mm., slender, flexuous, su- 

 bulate, rugulose; calyculus about one-third the sporangium, reddish 

 brown, shining, minutely striate with granular lines, the margin more 

 or less regularly serrate; net reddish brown, the meshes triangular and 

 the threads simple, slender; nodes large, thickened, polygonal, flat, 

 but well differentiated; spores when fresh dull red in mass, paling with 

 age, by transmitted light pale, nearly smooth, 6-7 /jl. 



A very singular species, easily recognizable by its long, very flexuose, 

 slender stipes, terminating in exceedingly small spherical sporangia. 

 The colors are obscure, but the striations on the calyculus are violet 

 tinted, and reddish lavender perhaps predominates elsewhere. "In 

 its scattered and solitary growth, its tall slender stipes and relaxed 

 habit, it resembles C. microcarpa, in its network it approaches C. te- 

 nella, and its spores have color of the paler form of C. purpurea." So 

 Dr. Rex, 1. c. Western forms of the first-named species have much 

 shorter stipes; the network in the specimens before us is unlike that 

 of C. tenella, but resembles that of C. purpurea. C. languescens re- 

 sembles C. cuprea in the shape of the sporangium and the nodes, but 

 the colors are different, the stipe is longer and the calyculus 

 smaller. 



C. lepida Meylan (Bull. Soc. Vaud. Sc. Nat. 56 : 326, 1927) is sim- 

 ilar in form, but dark violet in color, in this respect resembling C. vio- 

 lacea. While C. languescens commonly displays violaceous shades, no 

 collections approach the color of C. lepida, which may be regarded as 

 distinct. 



