322 FRYE 



Leaves short, rather obtuse, linear-lanceolate from a broad sheath- 

 ing base, patent when moist, lower ones glossy and dark colored; 

 dry leaves closely imbricate, rigid, curved at apex. Margin entire, 

 incurved from near base of limb, at apex cucullate, blunt. Lam- 

 ellae 30-50, 4-6 cells high; marginal cells larger than the others, 

 ovate-conical, smooth. 



Calyptra not covering the whole of the capsule. 



Capsule erect or inclined, oval, with 6 obtuse angles, reddish 

 brown; length to width about as i : i^; h)^ophysis obconic, not 

 constricted above. Teeth short, unequal. Lid with rather thick 

 beak. Pedicel 1.3-4 cm. long, short, rather thick. — On soil and 

 rocks. — Rocky Mountain region of British Columbia; Mt. Rainier, 

 Washington; Mt. Hood, Oregon; Greenland; Europe; Kamchatka 

 Peninsula; Herald Island, northwest of Bering Strait. 



9. Polytrichum juniperinum Willd., in Fl. Berol. Prodr. p. 305. 



(1787). 



So named because its leaves resemble those of the juniper. 



Plants scattered, 2-10 cm. high, glaucous green; male plants more 

 slender, with short leaves. Stems rarely branched, sometimes 

 slightly tomentose at base. 



Leaves less crowded at top of stem than in P. piliferum, spreading 

 when moist, erect when dry, long, lanceolate from an oblong base. 

 Margin incurved but not so nearly meeting as in P. piliferum, en- 

 tire. Lamellae 35-40, 4-7 cells high; marginal cells longer than 

 wide, ovate or flask-shaped, smooth. Vein excurrent in a red den- 

 tate sometimes slightly hyaline arista which is |-i| mm. long, 

 strongly toothed at back of apex, and often half way down. Peri- 

 chaetial leaves longer than foliage leaves, with longer arista, white 

 and membraneous at edges. 



Calyptra covering capsules. 



Capsule larger than in P. piliferum, sharply 4-angled, oblong; 

 hypophysis short, less distinct than in P. piliferum. Lid deep 

 red, beak short. Pedicel 4-6 cm. long, shining, bright red. — On 

 soil. — From Kotzebue Sound north of Bering Sea along the coast 

 to CaHfornia; Rocky Mountains; eastern North America; Green- 

 land. Our most common moss in this family. 



