The Cedar Mosses 



phyllia) on the stem between the true leaves are numerous 

 and of many forms. The leaves on the branches are smaller, 

 ovate, lance-shaped, concave 

 and overlapping; the cells are 

 small, round, six-sided, some- 

 times long, linear at the base 

 and four-sided on the borders. 

 The leaves at the base of the 

 pedicel are long, and over- stem-leaf. 

 lapping. 



The spore-cases are nar- 

 rowly ovate or cylindrical and 

 arched, with conical or more 

 or less long-beaked lids and 

 long pedicels. The teeth are 

 as in the genus Hypnum. 



Two hundred and forty- 

 four species are known at 

 present, fifteen of them in 

 North America. 



Cross-section 

 of leaf to show 

 papillae. 



Branch-leaves. 



Leaf at base 

 of pedicel. 



Thuidium dclicatiihim. 



Vertical section of peristome showing 

 three cells of the annulus on the right and 

 an outer and an inner tooth. 



(a.) and (&) Spore-cases with 

 lids ; (c) spore-case without lid , 

 (d~) spore-case with lid. 



Portion of peristome showing 

 four outer teeth on the left with 

 the inner membrane on the right, 

 annulus at the base of the tooth 

 on the extreme left. 

 Thuidium minutulum. 



28l 



Paraphyllia. 



