Peat-Mosses 



apex; basal cells large, clear; upper cells small, green, with 

 tiny projecting points. 



Habit of flowering, Male and female flowers on the same 

 plant (monoicous) ; male flowers sessile in the axils of the upper 

 leaves. 



Veil (calyptra). Split on one side. 



Spore-case. One or several on a plant, erect or nodding, 

 spherical with a sharp point at the top, -$ f an i ncn i n diameter. 



Pedicel. Short and curved, immersed or slightly emergent. 



Spores. Brown, rough, mature in March and April. 



Distribution. North and South America, Europe, Asia, Africa. 



P. nenosum. Vertical 

 section of spore-case to 

 show columella and 

 spores. 



P. tubulatum. Plants. 



P. tubulatum. Leaves. 



P. subulatum. Spore- 

 case split open to show 



columella. 



Genus PLEURIDIUM, Brid. 



The plants of the Genus Pleuridium are minute and erect 

 with simple or branching stems clustered to form dense cushions 

 on the ground. 



The leaves are small and few below, but longer and crowded 

 above; they are oval at the base, tapering to a long awl-like 

 point with a broad vein forming most of the apex. 



U7 



