Mosses and Lichens 



Plant (gametophyte). Simple, or increasing by shoots from 

 the summit of the main stem, i to } inches high, naked below, 

 loosely leafy above. 



Leaves. Curled when dry, spreading when moist, ^ to f of an 

 inch long, broadly lance-shaped; base transparent; margin ser- 

 rate, with many-celled, triangular teeth; lamellce numerous, 3010 

 35, cells of the lamellae 5 to 7 deep, the terminal broadest in sec- 

 tion with tiny projections on the flat surface. 



Habit of flowering. Male and female flowers on separate 

 plants (dioicous). 



Veil (calyptra). Hairy, covering the spore-case to the base. 



Spore-case. Erect, egg-shaped, ^ of an inch long, with tiny 

 projections on the surface, not contracted below the mouth when 

 dry. 



Pedicel (seta). One-half to one and a half inches long, 

 slender, flexuous, erect. 



Lid (operculum). Hemispherical at the enlarged base, abruptly 

 straight-beaked. 



Teeth (peristome). Thirty-two in number, long and narrow. 



Spores. Mature in winter. 



Distribution. Rare in the mountains of New York, common 

 in the mountains of New England; also along the Gaspe Coast to 

 Newfoundland, west to the Rocky Mountains. 



The Urn-bearing Hair-cap Moss, Pogonatum urnigerum, 

 (L.) Beauv. 



Habit and habitat. Pale-green or with a bloom, growing in 

 wide mats but not crowded. On the banks and by streams. 



Name. The specific name urnigerum, urn-bearer, refers to 

 the spore-case. 



Plants (gametophyte). Erect, i to } inches high, the branches 

 reaching the same height and densely leafy, each branch of the 

 female plant bearing a spore-case. Male plants continue to grow 

 from the centre of the terminal rosette. 



Leaves. Pale-green or brown, lance-shaped, erect when 

 dry, spreading when wet; apex acute; base short, clasping; vein 

 extending slightly beyond the apex of the leaf as an awn; lamel- 

 lae numerous, 40 to 50; 6 cells high, the terminal oval, with tiny 

 projections (papillose), lower leaves scale-like. 



Habit of flowering. Male and female flowers on the summits 

 of separate plants (dioicous). 



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