FIGS. 



PLATE XXXII. 

 [Proc. Wash. Acad. Sci., Vol. IV, PI. XV.] 



a-g. Barbula rigens. 



, a. Entire plant, natural size. 



,b,b. Leaves (X 26). 



, c. Apex of a leaf (Xi35)- 



, d. Basal areolation ( X I 35) 



, e. Cells in the middle of a leaf ( X 



,/. Transverse section of the leaf in the lower part ( X 135)- 



, g. Transverse section of the leaf in the upper part ( X 180) 



2, a-g. Barbula treleasei. 



2, a. Entire plant, natural size. 



2, . Leaf (X 26). 



2, c. Perichsetial leaf ( X 26). 



2, d. Apex of the stem leaf ( X 60). 



2, e. Basal areolation of same ( X J 35)* 



2,/i Cells in middle of same ( X I 35) 



2, g. Old capsule in dry state ( X J 3)- 



3, a-h. Rhacomitrium cyclodictyon. 

 3, a. Entire plant, natural size. 

 3, , 3. Leaves (X 26). 



3, c. Perichaetial leaf ( X 26). 



3, d. Transverse section of a stem leaf ( X 100). 



3, e. Basal areolation of same ( X 270). 



3,y. Areolation in the middle ( X 270). 



3, g. Areolation of the apex ( X J 35)* 



3, h. Old capsule in moist state ( X I 3) 



4, a-g. Ulota alaskana. 



4, a. Entire plant, natural size. 



4, b, b, b. Leaves (X 13 ) 



4, c. Marginal areolation in the lower part ( X I 35) 



4, d. Capsule and caljptra ( X I 3) 



4, e. Capsule and lid ( X 13)- 



4,/i Capsule ripe, in dry state ( X J 3)- 



4, g. Same, in moist state ( X I 3) 

 [352] 



