The Primitive Mosses 



Leaves at the base of the spore-case (pericljcetical leaves). 

 Broader and longer. 



Habit of flowering. Male and female flowers in separate clus- 

 ters on the same plant (autoicous). 



Veil (calyptra). Very thin, irregularly torn below. 



Spore-case. Spherical, on short side branch. 



Pedicel. Very short. 



Lid (operculum). Wanting. 



Teeth (peristome). Wanting, 



Spores. Sixteen to twenty, angular, smooth, mature in fall 

 and winter. 



Distribution. North America, Ohio and southward. 



Plant. 



Archidium Ohienst. 



Sporophyte. Spore- 

 case with veil. 



Plant with spore-case 

 Leaf. immersed in leaves. 



Astomum Stdlivantii. 



Genus ASTOMUM, Hampe 



The species of the Genus Astomum are minute, simple or 

 branching plants, living in matted tufts on the ground. 



The leaves are lance-shaped, tufted and curling toward the 

 apex of the stems. 



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