' The Genus Hypnum 



Secondary stems regularly feather-branched ; stem-leaves 

 differing decidedly from the branch-leaves ; vein translucent; 

 spore-case curved ; lid conic, beaked. 



Brachythecium. Plants often large, prostrate, irregularly 

 divided, the branches erect; leaves usually smooth with folds 



Brachythecium 

 rivulare. Leaf. 



Brachythecium Starkii. 

 Leaf. 



Brachythecium rivulare. Plant 

 with sporophyte. 



Brachythecium Starkii. Base of 

 leaf to show cells enlarged at the 

 angles. 



extending lengthwise of the leaf and -veined to the middle or 

 above; cells loose, elongated, rhomboidal, enlarged at the base 

 and angles ; lid conical, obtuse, or short-pointed. 



Eurhynchium. Plants somewhat feather-branched ; leaves 

 heart-shaped, growing down the stem at the basal angles, 



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