THE POLYTRICHACEZ OF WESTERN NORTH AMERICA es 
2. Polytrichum attenuatum Menz., in Trans. Linn. Soc. (1798), 
Wes 72: 
Polytrichum conorhynchum Kindb., in Mac. Cat.,p.164 (1892). 
Polytrichum formosum Hedw., in Sp. M., p. 92 (1801). 
Name derived from attenuatus = drawn out; referring to the 
long narrow, simple form of the plant often found. 
Plants loosely tufted, dark green, 7-20cm. high. Stems erect or 
ascending, tomentose at base, simple or forked. 

Fig. 19. Polytrichum attenuatum. 
1 = Moist plant with capsule, X 1. 2 = Dry plant, X 1. 3 = Capsule, X 5. 
4 = Peristome, X 150. 5 = Leaf showing lamellze on upper side, X 15. 6 = Leaf 
tip, X 65. 7 = Cross section of leaf showing lamelle ,x 65. 8and9 = Cross sections 
of a few lamella showing height and the marginal cells, X 250. 
