-^4- 



Plate VII. 



I. — Hypnum pseudostramineum C. Miill. a. Stem leaf x i6. b. Apex 

 of leaf X 200. c. Middle cells x 200. d. Basal part of costa x 120. 



2, — Hypnum plesistramineum Ren. a. Stem leaf x 16. b. Leaf apex 

 X 200. c. Middle cells x 200. d. Basal part of costa x 120. 



3. — Hypnum Tundrae Arnell a, a, a, a, Stem leaves x 16. b. Leaf apex 

 x 200. c. Middle cells x 200. d. Marginal cells near base x 120. e. Basal 

 part of costa x 120. f, f, f. Branch leaves x 16. g. Apex of branch leaf x 

 200. h. Marginal cells of same x 200. i. Auricles x 170. 



