PLATE XXXII. 

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



FIGS, i, a-g. Barbula rig-ens. 



i, a. Entire plant, natural size. 



, b, b. Leaves ( X 2 6). 



, c. Apex of a leaf ( X !35)- 



, d. Basal areolation ( X 135)- 



, e. Cells in the middle of a leaf ( X 1 35)- 



,_/. Transverse section of the leaf in the lower part ( X 



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



2, a-g. Barbula treleasei. 



2, a. Entire plant, natural size. 



2, b. Leaf (X26J. 



2, c. Perichsetial leaf ( X 2 ^). 



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



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



2,f. Cells in middle of same ( X I 35) 



2, g. Old capsule in dry state ( X l $)- 



3, a-h. Rhacomitrium cyclodictyon. 

 3, a. Entire plant, natural size. 

 3, b, b. Leaves ( X 26). 



3, c. Perichsetial leaf ( X 2 6). 



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



3, e. Basal areolation of same ( X 2 7)- 



3,y. Areolation in the middle ( X 2 7) 



3, g. Areolation of the apex ( X J 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 13)- 



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



4, d. Capsule and caljptra ( X J 3)- 



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



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



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



[352] (3 



