(366) 



broad, ^ width of leaf base, with leaf-cells long and narrow 

 above, often 1-6 (145). 



Pohlia albicans (Wahlenb.) Lindb. Stanton Lake, G. N. 

 Ry. A rather slender form growing amongst grass, Aug. 3, 

 Columbia Falls (248). A taller sterile form approaching 

 glacialc was collected at Teakettle Mt. near Columbia Falls 



(4 2 7). 



(I am indebted to M. Philibert for a revision of most of the 



Bryums.) 



Br yum arcticum (R. Ruthe) Br. & Sch. Forty-mile Cr., 

 Blackfeet Ind. Reserv., Aug. 15 (392). 



Bryum -pendulum (Hornsch.) Schimp. North Fork of 

 Sun River, 5,000 ft., Aug.; Great Falls, 3,200 ft., June 



(62). 



Bryum calophyllum R. Br. Near Divide Mt., Blackfeet 

 Ind. Reserv., on wet gravelly soil at about 6,000 ft. These 

 specimens have somewhat acutely, but very shortly, pointed 

 leaves. They measure about 2 by i}4 mm. The leaf-cells 

 are very lax, thin-walled and up to .065 mm. long. 



Bryum uliginosum (Bruch) Br. & Sch. Belt Mts., Sept. ; 

 Columbia Falls, Oct. Spores rather large, .028 to .030 mm. 



Bryum intermedium (Ludw.) Brid. Forty-mile Cr., Aug. 

 15. Leaf-cells rather large, median up to .060 mm. long and 

 .016 mm. wide. Leaf border of 1 or 2 rows of narrower, 

 elongated not very well defined cells and revolute nearly all 

 round. Teeth of peristome with about 25 parallel lamellae 

 and outer plates near base 2 to 2 % times wider than high. 

 Spores somewhat roughened, up to about .020 mm. (147). 



Bryum binum Schreb. Columbia Falls, July. On logs 

 and earth in clamp places (428). What I take to be a form 

 of this species occurs in marshes amongst tall sedges and 

 reeds. The sterile tufts bear long slender branches, up to 4 

 or 5 cm., the seta is rather longer and the capsule soon be- 

 comes very dark colored (251). 



Bryum cusp i datum Schimp. Columbia Falls. On old 



logs, June 22 (404). 



