grout] 



SOME COMMON MOSSES 



337 



Hvpnum Haldanianum X5, dry 



Many of our mosses, however, develop the sporophyte from 

 lateral buds along a creeping or trailing stem. These have been 

 called pleurocarpous. 



This division of the mosses is old fashioned and not technically a 

 good one, for it does not divide the mosses according to their 

 natural relationships. It is, notwithstanding, a very convenient 

 classification for a popular article, as the distinctions are so appar- 

 ent in nearly all cases. 



For the subject of this article I have taken three common mosses 

 belonging to the old genus Hypnum. 



