248 



The Plant World. 



The peridial teeth of C. cinnabarinum are bright vermilion 

 and very conspicuous, those of C. lutescens are lemon-yellow on 

 the margin and pale vermilion within. There is, furthermore, 

 a very notable difference in the character of the footstalks. 

 C. cinnabarinum has a footstalk which becomes decidedly 

 gelatinous in the presence of water, whereas the footstalk of 

 C. lutescens does not become distinctly gelatinous but has a 

 rather harsh, woollv character. It is also characterized by 



Fig. 2. Calostoma lutescens. (Schw.) Bumap. (For size of plants see table.) 



being more open and possessing larger meshes. Its color, as 

 noted by Burnap, is notably yellow, whereas the other is red- 

 brown, or brownish. The spores also agree closely with Burnap's 

 description. Those of C. cinnabarinum are elliptic, oblong and 

 echinulate, 14 to 15 microns long by 6 to 7 wide. The spores of 

 C. lutescens are unmistakably globose, verrucose, 7 to 8 microns 

 in diameter. 

 I Virginia F'olytechnic Institute. 



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