Mosses and Lichens 



Ohio Hairy-cap, Polyiricbum Ohiense, Ren. and Card. 



Habit and habitat. Found on the ground growing loosely in 

 patches. Distinguished from P.formosum* by the form of the 

 spore-case, which is more or less narrowed toward the base and 

 has an indistinct apophysis, but chiefly distinguished by the form 

 of the marginal cells of the lamellae, a character which separates 

 it from all our other species of Polytrichum. 



Name. The specific name Ohiense refers to the fact that the 

 type specimen came from Ohio. 



Plant (gametophyte) . Erect, simple or divided, i J to 3 inches 

 high, woolly below. 



Spore-case. 



Vertical sections of lamellae to show terminal cells. 

 P. Ohiense. 



Leaves. Spreading when moist, erect and slightly twisted 

 when dry; apex narrowly taper-pointed, the awn spiny; base 

 white, sheathing; margin serrate; lamella 30 to 40; cells 5 to 7 

 deep, the marginal cell much larger, broader than high, stirrup- 

 shaped in section. 



Leaves at the base of the pedicel (pericha:tial leaves). Resembling 

 the stem-leaves, longer and with a longer transparent base. 



Habit of flowering. Male and female flowers on separate 

 plants (dioicous). 



Veil (calyptrd). Pale, small, ragged, not concealing the 

 spore-case. 



Spore-case. Erect, finally horizontal, with 4 to 6 acute angles, 

 the base tapering into an indistinct apophysis. 



Pedicel (seta). Red below, paler above, 2 to 4 inches long. 



Lid (operculum). Conic and taper-pointed, bordered with 

 orange. 



Teeth (peristome) . Sixty-four. 



* NOTE. Polytrichum formosum seems to be rare in America, having 

 been reported only from Miquelon Island, near Newfoundland. 



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