(377) 



Hvpnum rcvolutum (Mitt.) Lindb. (H. flicatile Mitt.) 

 Belt Mts., July; Two-medicine Lake, Essex, Columbia 

 Falls (124). 



Hypnum pratcnse Koch. Columbia Falls. Lax, sterile 

 specimens growing in shallow "water or damp hollows. The 

 complanate leaves are usually distinctly serrulate towards 

 apex (261). 



Hxpnum Lindbergii elatum Schimp. Columbia Falls, on 

 wet, shady sand along river, July (206). 



Hy-pnum Haldanianum Grew Columbia Falls, Oct. (227). 



Hypnum palustre Huds. Highwood Mts., Belt Mts., Sun 

 River Canon, Columbia Falls, July (74). 



Hypnum styriacum Limpr. Belt Mts., Columbia Falls, 

 Forty-mile Cr. and Cut-bank Cr., Blackfeet Ind. Reserva- 

 tion, 5,000 ft., Aug. Not before credited to North America. 

 It is somewhat like a slender form of the preceding, with 

 more distant, curved and spreading leaves. The leaves are 

 also rather more pointed, often distinctly serrulate on margin 

 below, and vein weaker, usually slightly forking above. The 

 flowers are clustered along the stems, often 2 or 3 9 and 1 $ , 

 and the outer perigonial leaves are figured by Limpricht as 

 distinctly 3-toothed, this character is variable however in 

 authentic specimens received from J. Breidler, the original 

 collector of the species in the Alps of Austria (400). 



Hypnum arcticum Sommerf. Observation Mts., Blackfeet 

 Ind. Reserv., Macdonald Lake, Aug. This is a rather 

 slender species with nearly round entire leaves, about 1 mm. 

 in diameter and stout costa mostly extending well up above 

 the middle of the leaf and not forked or only slightly so in 

 the upper part (387). 



Hypnum dilatatum Wils. Neihart, Belt Mts., 5,000 ft. 

 This species is somewhat larger than the preceding with 

 mostly a little narrower, somewhat pointed leaves, a much 

 shorter, forking costa and a distinct cluster of enlarged alar 

 cells. The leaves are close together on the stems, somewhat 

 decurrent and up to about 2 mm. long. Branch leaves some- 

 times distinctly serrulate. Capsule with distinct annulus of 



