Mosses and Lichens 



segments (cilia). Sometimes the cilia have spurs attached at 

 intervals to the margins. 



There are ninety-nine species in all, thirty-three in North 

 America. Of the fifteen species which appear in the Eastern 

 States, five will be found with entire borders to the leaves, five 

 with a single row of teeth, and five with a double row. 



The Pointed Mnium, Mnium cuspidatum, Hedw. 



Habit and habitat. The Pointed Mnium (Mnium cuspidatum) 

 is one of the prettiest of the genus and is to be found in shaded 

 places on the ground in almost every state and territory in the 

 Union. 



Name. J. G. Hedwig, a German botanist, named this species 

 from the Latin cuspidatum, a point, on account of the apex of 

 the leaves. 



Leaves. 



M, cuspidatum. 



Branch leaf. 



Plants (gametophyte). Simple, the young shoots bright pale- 

 green, the older stems dark-green, the sterile shoots prostrate 

 or somewhat erect. 



Leaves. All with a short sharp point at the apex, vein 

 extending beyond the apex to form the point. Stem-leaves 

 with the base growing downward on the stem (decurrent) 

 oval-oblong or obovate-spatulate ; branch-leaves smaller, 

 rounded-oval; all much crisped when dry; margin with 3 to 5 

 rows of yellow cells, and a single row of spiny teeth in the 

 upper half. 



Leaves at the base of the pedicel (perichatial leaves). Spat- 

 ulate. 



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