THE POLYTRICHACEZ OF WESTERN NORTH AMERICA 291 
ovate or somewhat spherical, .o12—.016 mm.—On soil.—Virgin 
Bay, Orca, Douglas Island, and Wrangel, Alaska; Japan; Kam- 
chatka. 

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Fig. 10. Bartramiopsis lescurii. 
1 = Plant dry, X 1. 2 = Moist plant, with capsule, X 1. 3 = Moist plant, with- 
out capsule, X 1. 4 = Capsule with lid, not quite mature and therefore slightly 
shrunken, X 5. 5 = Mature capsule without lid, X 8. 6 = Leaf showing hairs at 
margin and lamelle on upper side, X 15. 7 = Leaf showing narrower blade and more 
curved tip, X 12. 8 = Leaf tip, upper side, showing lamelle, X 100. 9 = Leaf 
tip, under side, X 100. 10 = Cross section of leaf showing 2 layers of cells except 
near the margin, X 65. 11 = Cross section of a few lamella, X 250. (Numbers 
5, 7, 8, 9, after Engler & Prantl.) 
POLYTRICHADELPHUS Mitt. 
Polytrichum is another genus of mosses, adelphos = brother; 
hence a brother to Polytrichum. 
Plants dioicous, more or less robust, rigid, loosely cespitose. 
Stems from subterranean rhizomes, erect or inclined, usually quite 
long, densely leafy, simple or forked or tufted. 
