Mosses and Lichens 



without lamellae; base sheathing, transparent, shorter than the 

 awn. 



Habit of flowering. Male and female flowers on separate 

 plants (dioicous}. 



Veil (calyptra). Mitrate, covering the spore-case. 



Spore-case.-- Erect, finally 

 horizontal, egg-shaped, 

 4-angled. Apophysis distinct, 

 constricted above where it 

 passes into the spore-case. 



Pedicel (seta}. Erect, I to 

 i-J inches long. 



Lid (operculuni). With a 

 short stout beak, red or orange. 

 Teeth (peristome). Sym- 

 metrical, sixty-four in number. 

 Spores. Smooth, ripe in 

 summer. 



Distribution. - - America, 

 Europe and Asia. 



P. piliferum. 

 Perichsetial leaves. 



P. piliferum. 

 Leaves. 



Spore-case. 



Perigonial leaves. 

 P. pilifcrtim. 



Vertical section 

 of lamellate show 

 pointed terminal 

 cell. 



Juniper Hairy-cap, Polytrichum juniperinum, Willd. See 

 Plate XXI. 



Habit and habitat. Common by damp sandy roadsides, or in 

 peat-bogs. This is one of the Hairy-caps which in dry air turns 

 its leaves up against the sun in order to protect the delicate 

 lamellae from his rays. It as well as P. piliferum, is conspicuous 

 for its bluish-white bloom, but differs from P. piliferum in that 

 the leaves are tipped with a short red awn instead of with one 

 long, white, and hair-like. 



Name. --Carl Ludwig Willdenow named this pretty moss 

 juniperinum from its resemblance to tiny Juniper trees. 



254 



