The Genus Hypnum 



slightly curved. Leaf-cells comparatively broad, short six-sided, 



usually not abruptly enlarged in the angles. Pedicel tall and 



smooth. Spore-case more or less 



cylindrical and curved, with conical * /[ 



lid obtuse or acute. |\ /.\ 



Base. 



Apex. 



Leaf-cells. 



Leaves. 



Amblystcgium variiim. 



Harpidium. Stems usually tall, more or less feather- 

 branched ; leaves scythe-shaped and turned to one side, very 

 acutely pointed ; vein simple, often reaching the apex; cells 



Portion of leaf to show 

 Leaf. enlarged alar cells. 



Harpidium uncinatum. 



narrow, linear, the alar much inflated. Plants often growing 

 in water. 



Ctenium. Plants in compact tufts of a pale yellow-green, 

 the branches and branchlets regularly and closely placed feather- 



277 



