Mosses and Lichens 



half-emergent, dirty-brown when old, strongly constricted under 

 the mouth. 



Lid (operculum). Conical, obtusely short-pointed. 

 Teeth (peristome). The outer eight double teeth, dirty-yel- 

 low, granulose, reflexed when dry; the inner, of eight filiform 



strong segments. 



Spores. Mature in May and June. 

 Distribution. North America only. 



With veil. Without veil 



Mature sporophyte. 



O. rupeslris. 



O stranguldlum 

 Dry spore-case. 



O. slrangulaium. 

 Leaf. 



O. rupeslris. 

 Dry sporo- 

 phyte with- 

 out lid. 



Mature sporo- 

 phyte with 



veil, 

 O. strar.guiatiim. 



O. strangulalum. 

 Spore-case without lid. 



O. rupestris. Plant. 



THE EXTINGUISHER MOSSES 

 Genus ENCALYPTA, Schreb. 



The species of the Genus Encalypta grow on bright-green 

 cushions on rocks or on the ground. 



The leaves are linear, spatulate or tongue-shaped and are 



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