THE POLYTRICHACEZ OF WESTERN NORTH AMERICA 299 
Leaves not crisped when dry, gradually longer upwards; lower 
leaves distant, small, appressed; upper leaves large, linear from a 
short sheathing base. Margin sharply serrate. Lamelle 45—55; 
marginal cells of lamella much larger, papillose, rectangular or oval, 
wider than long as 14—2:1. 
Calyptra hairy, hardly covering capsule to base. 
Capsule oblong-cylindric, erect, papillose, thin, without stomates. 
Teeth 32. Lid hemispheric, abruptly straight-beaked. Pedicel 
slender, flexuous, long.—On soil.—St. Paul Island, Bering Sea; 
from the Alaska Peninsula along the coast to southern Alaska; 
Rocky Mountains of British Columbia and the United States; 
Portland, Oregon; Adirondack Mountains; White Mountains; New- 
foundland; Miquelon Island; Greenland; Scandinavian Peninsula; 
Siberia. 
3. Pogonatum urnigerum (L.) Beauv., in Prodr. p. 84 (1805). 
Polytrichum urnigerum L., in Sp. Pl. II, p. 1109. n. 3. (1753). 
Name derived from urna = urn, and gerere = to bear; probably 
referring to its erect, wide-mouthed capsule. 
Plants erect, 2.5—7.5 cm. high, dark green, brown below. Stems 
rigid, sometimes forked at tip. } 
Upper leaves lanceolate from a pale sheathing base, crowded, at 
apex acute to acuminate; when moist patulose; when dry rigid, not 
crisped, appressed, erect. Margin plane or erect, sharply toothed 
nearly tosheath. Lamelle 4o—50,4—6 cells high; marginal cells 
not much larger, rounded, thickened, papillose, yellowish-green. 
Vein slightly excurrent or vanishing, sharply spinose at back. Cells 
quadrate-hexagonal or rounded. 
Calyptra longer than the capsule. 
Capsule erect or nearly so, symmetric, wide-mouthed, yellowish- 
brown to brown, without stomates, very papillose. Teeth 32, red- 
dish. Beak of lid almost straight, subulate. Pedicel 2.5—4 cm. 
long, slender, pale reddish.—On soil and soil-covered rocks. 
Coast of Alaska from Disenchantment Bay near mouth of Yukon 
River to the vicinity of Juneau; Rogers Pass, Selkirk Mountains, 
British Columbia; Cathlamet, Washington; Portland, Oregon; 
Europe; Asia. 

