The Sub-genus Hylocomnium 



double to the middle; margin closely toothed; base auriculate; 

 cells of the basal angles wide, transparent, oblong six-sided. 

 Branch-leaves narrower, and gradually smaller upward. 



Habit of flowering. Male and female flowers on separate 

 plants (dioicous). 



Veil (calyptra). Split up one side. 



Leaf at base of 

 pedicel. 



Stem leaves. 

 H. triquetrum. 



Apex of leaf. 



Spore-case. Oblong, horizontal or inclined by a curve of its 

 pedicel under the base, narrowed at the mouth when dry. 



Pedicel (seta). Curved below the spore-case, i to i^ inches 

 high. 



Base of leaf. 



(a) Spore-case with veil ; 

 (6) Spore-case with lid. 



H. triquetrum. 



