FIGS. 



PLATE XXXII. 

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



a-g. Barbula rigens. 



a. Entire plant, natural size. 



b. b. Leaves ( X 2 6). 



c. Apex of a leaf ( X ^ZS)- 



d. Basal areolation ( X *35)- 



e. Cells in the middle of a leaf ( X I 35) 



,_/. Transverse section of the leaf in the lower part ( X 1 35)' 



1, ff. Transverse section of the leaf in the upper part ( X iSo). 



2, a- -g. Barbula treleasei. 



2, a. Entire plant, natural size. 



2, . Leaf (X 26). 



2, c. Perichaetial leaf ( X 26). 



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



2, e. Basal areolation of same ( X I 35)- 



2,y. Cells in middle of same ( X 1 35)* 



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



3, a-h. Rkacomitrium cyclodictyon. 

 3, a. Entire plant, natural size. 

 3, b, b. 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 2 7)- 



3,_/i Areolation in the middle ( X 270). 



3, g. Areolation of the apex ( X I 35)- 



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

 4> a-g' Ulota alaskana. 



4, a. Entire plant, natural size. 

 4, b, b, b. Leaves ( X !3)- 



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



4, d. Capsule and calyptra ( X J 3) 



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



4,/. Capsule ripe, in dry state ( X I 3) 



4, g. Same, in moist state ( X 1 3)> 

 [352] (312) 



