— 26— 



Amblystegium Montanse Brylm. 



Fig. I, A plant, Xi. Fig. 2, A stem, cross section. Figs. 3,4, 5, Leaves 

 (these and Fig. 2 enlarged). Figs. 4a, 4b, 4c, Leaf cells from near apex, 

 middle and base, respectively of Fig. 4. Figs. 6, 7, 8, Leaf sections much 

 enlarged. 



A PUZZLING nOSS FROn NORTHWESTERN HONTANA. 



By John M. Holzinger. 

 Among the mosses brought back from Montana in 1898 was one collected 

 at the base of Sperry Glacier at the altitude of about 3000 m., which has been 

 a puzzle to some of the best moss students both in Europe and in this coun- 

 try. From its leaf areolation (it was found only sterile), and from its occur- 

 rence on the ground it seems most likely to belong to the genus Ambly- 

 stegium. But Prof. L. S. Cheney, who has monographed this group, and to 

 whom it was therefore referred, returned it with the remark that he did not 

 recognize it as any Amblystegium he knew. Cardot and Theriot then 

 tackled it and referred it to Amblystegium varium orthocladon. Under this 

 name the writer sent out a number of duplicates, and the determination was 

 recognized, by letters, to be correct "though the form is remarkable," by 

 men from both sides of the Atlantic specially interested in this group. Yet 

 Dr. Kindberg has from the first insisted that the plant is straight Leskea 

 polycarpa, and in this view he is supported by Mr. R. S. Williams. Dr. 



