(365) 



Pohlia nutans (Schreb.) Lindb. Common, Belt Mts. ; 

 Highwood Mts. ; Sun River Canon ; Columbia Falls. A 

 very short form, var. bicolo?-, was collected at about 7,000 ft. 

 near Stanton Lake. It greatly resembles cucullata in general 

 appearance. 



Pohlia cucullata (Schwaegr.) Bruch. Forty-mile Cr., 

 Blackfeet Ind. Reserv., Aug. 15. This species has leaf- 

 cells very thin-walled and much wider (.015-. 018 mm.) than 

 the preceding, the exothecal cells are also thin-walled and up 

 to .050 mm. wide and not much elongated. The segments of 

 the endostome are narrow with short-imperfect cilia between 

 (402). 



Pohlia commutata (Schimp.) Lindb. Columbia Falls, on 

 earth, at 7,000 ft. This species has relatively broader and 

 shorter leaves than any other of our dioicous Pohlias. The 

 segments of the inner peristome are more or less split along 

 the keel with two cilia nearly as long between or sometimes 

 with none even in the same peristome (341). 



Pohlia atrofiurfitirea (Wahlenb.) Lindb. fil. Columbia 

 Falls, on wet gravel about springs, May. I am indebted to 

 Harold Lindberg, fil., for the determination of this species. 

 It is dioicous, exannulate, teeth of peristome dark ferrugi- 

 nous, stomata superficial, leaves not or scarcely decurrent, 

 seta large and fleshy above while growing. The leaves are 

 narrower and less serrate than in carnca which has light- 

 colored teeth. Not before credited to America, I believe (297). 



Pohlia vcxans (Limpr.) Lindb. fil. Tenderfoot Cr., Belt 

 Mts., on rocks, Oct. Also determined by Harold Lindberg. 

 It is certainly near pulchclla, which according to Lind- 

 berg has a well-differentiated annulus. P. vexans is sup- 

 posed to have no annulus, but my specimens show a tendency 

 to produce an annulus (in the well-developed capsules) of 1 

 or 2 rows of slightly smaller but otherwise scarcely different 

 cells that mostly remain attached to the lid, breaking away 

 in small fragments. This is about like the annulus described 

 for pulchella in Lesq. & James' Manual. The Montana plant 

 is dioicous, with decurrent leaves, costa red at base and 



