BAETRAMIA POMIFOKMIS. 



17 



The Record. In the preceding tablet are recorded the 

 principal facts we have now learned concerning the Pigeon- 

 wheat Moss. 



Review of the Scientific Terms which have been employed 

 and denned in this lesson. If the student will master them here, they 

 need not be explained hereafter. Analysis. Axis. Calyptra. Capsule. 

 Cryptogamia. Lanceolate. Linear. Operculum. Organized. Pedicel. 

 Peristome. Rootlet. Simple. Spores. Stoma. Terminal. Terete. 



II. THE APPLE MOSS. 



Description. This pretty Moss is known hy its round, 

 apple-shaped capsules. It grows in large, dense tufts, 2' or 

 3' (inches) high, of a light or yellowish-green color, often cov- 

 ering the ground on shady 

 banks or in open woodlands. 



Analysis. The 3tool is a 

 simple axis, clothed with mi- 

 nute rootlets, which appear like 

 a soft brownish down. 



The Stems are densely 

 crowded, repeatedly forking, 

 or dichotomous (dividing by 

 pairs), covered and concealed 

 by their leaves. 



The Z/eaves are numerous 

 and crowded on the stem and 

 branches. They are narrower 

 than those of the Polytrichum, narrower even (proportion- 

 ately) than a cobbler's awl ; hence we define them as linear- 

 subulate (subula, an awl).* 



* Viewed under a strong microscope, the leaf of this Moss, and indeed every other 

 part of it, appears a tissue of cells all of one shape and size throughout polygons 

 somewhat longer than wide. In other words, the I^oss is wholly composed of cettuUir 



tissue,. 



FIG. II. Bartramia pomif6rmis. 



