(374) 



to 2.25 mm. long. Limpricht gives 1.8 mm. for the species 

 but'there are two European varieties with larger leaves (up 

 to 2.10 mm.) and the more common Montana form exactly 

 matches in appearance the variety as given above (257). 



Brachythccium collinum (Schleich.) Br. & Sch. Belt Mts., 

 Essex, G. N. Ry. ; Boulder Cr., Little Badger Cr., Two- 

 medicine Lake and Hart Butte, Blackfeet Ind. Reservation. 

 What is considered the typical form of this plant usually 

 grows in rather dry, exposed mountain regions at 5,000 or 

 6,000 ft. (301). Specimens collected at Great Falls (7) ap- 

 proach the following variety. 



Brachythecium collinum subjulaceum Pfeffer. Divide Mt. 

 and Two-medicine Lake, Blackfeet Ind. Reservation. Grow- 

 ing in moister, more shaded places, of larger size with larger, 

 less imbricated leaves (435). 



Brachythccium Idahensc Ren. & Card. Belt Mts., Colum- 

 bia Falls. This plant seems to be almost too close to the 

 preceding variety from which it differs, apparently, only in 

 the narrower leaves, which are somewhat variable (88). 



Brachythccium eryihrorrhizon Br. & Sch. Belt Mts., Nov. 

 2 ; Columbia Falls, April (235). 



Eurhynchium strigosum (Hoffm.) Br. & Sch. Two-medicine 

 Lake and Forty-mile Cr., Blackfeet Ind. Reserv. (434). 



Eurhynchium strigosum robustum Roell. Belt Mts., Sand 

 Coulee, Columbia Falls, Oct. (73). 



Eurhynchium strigosum fallax Ren. & Card. Columbia 

 Falls, July (86). 



Eurhynchium diversifolium (Schleich.) Mol. & Lorentz. 

 Belt River, Columbia Falls, March (8). 



Eurhynchium praelongum Stokcsii (Turn.) Dixon. Near 

 Avalanche Basin above Macdonald Lake (348). 



Eurhynchium stolonifcrum (Hook.) Jaeger & Sauerb. Co- 

 lumbia Falls (299). 



Sclcrofodium obtusifolium (Hook.) R. & C. Giant Spring, 

 Great Falls," Columbia Falls, Macdonald Lake (4). 



Porotrichtim Lcibcrgii E. G. Britton. Essex, G. N. Ry., 

 5,000 ft. (380). 



