Mnium Mosses 



M. cuspidatum. Plant with 

 fertile branch on the right '*?? 

 and sterile branch on the left. 



The spore-cases are more or 

 less pendulous, on long and 

 slender, often clustered pedicels. 

 They are oblong-cylindrical or 

 oval, never pear-shaped. The 

 lids are convex, long-beaked, 

 taper-pointed, or tipped with a 

 tiny blunt point. The annulus 

 is usually conspicuous, rolling 

 back as the lid falls. 



The peristome is double, the 

 outer teeth being long and nar- 

 row or lance-shaped, closely 

 cross-barred below, with the 

 bars evident on the inner surface; 

 the inner membrane is keeled 

 and reaches to the middle of 

 the outer teeth, where it divides 

 into large segments alternating 

 with two or three thread-like 



M. affine. Portion of 

 peristome. 



M. cuspidatum. 

 Inner membrane. 



