Mosses and Lichens 



back and expanded toward the apex into a vertical simple blade; 

 the vein extends to or beyond the apex ; the cells are small and 

 filled with leaf-green. 



The spore-cases are erect, horizontal or pendent, always 

 smooth and terminal, unless they have been thrust to one side 

 by the growth of a branch at the base of the pedicel. 



Leaf with double- 

 base lid. 



Portion of peristome. 



The apex of the main stem is 

 at the base of the pedicel ; a side 

 branch on the right has grown 

 on beyond the main stem. 



Cross sections 



of leaf. 

 F. adiantoides. 



Spore-case with veil. 



The peristome is single with sixteen teeth, red at the base and 

 cleft at the apex, a character which has suggested the generic 

 name from the Latin fissus, split, and dens, a tooth. When dry 

 the teeth are incurved. The annulus consists of from one to 

 four rows of large cells. 



158 



