327 
THE POLYTRICHACEZ OF WESTERN NORTH AMERICA 

: apal 
OBE 

aS 

Polytrichum piliferum. 
Fig. 30. 
1 = Moist plant with capsule, x 1. 
Capsules, 
150. 
, 3 and 4 = Dry plants, X 1. 
Capsule with calyptra, immature, X 5. 9 
6and7 = 
? 
5 
Peristome, X 
10 and 11 = Leaves showing involute margin and lamelle on upper side 
12 and 13 = Leaf tips, X 65. 
2 
KS: 
Xx IS. 
15 = Cross section 
» X 250. 
? 
>< 05: 
somewhat thickened cells 
b 
14 = Cross section of leaf 
) 
of a few lamelle showing flask-shaped 
