PLATE XXXII. 

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



Figs, i, a-g. Barbula rigens. 



I, a. Entire plant, natural size. 



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



I, c. Apex of a leaf ( X I35)- 



1, d. Basal areolation ( X 135) • 



I, e. Cells in the middle of a leaf ( X I35)' 



£,/. Transverse section of the leaf in the lower part ( X I35)' 



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



2, a-g. Barbula treleasei. 



2, a. Entire plant, natural size. 



2,3. 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 135)' 



2,/". Cells in middle of same ( X i35)« 



2, g. Old capsule in dry state ( X I3)« 



3, a-k. Rhacomitriutn 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 270). 



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



3, g. Areolation of the apex ( X 135)- 



3, k. Old capsule in moist state ( X ^S)* 



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 ^SS)* 



4, d. Capsule and caljptra ( X ^Z)- 



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



^,f. Capsule ripe, in dry state ( X ^S)- 



4, g. Same, in moist state ( X 13)- 

 [352] (312) 



