PLATE XXXV. 



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



FIGS. I, a-k. Bryum drepanocarpum. 



I, a. Entire plant, natural size. 



I, b, b. Leaves ( X 13)- 



i, c. Transverse section of a leaf ( X6o)- 



I, d. Part of the same ( X J 35)- 



i, c. Marginal areolation in the middle of a leaf ( X I3S) 



i,y. Areolation of the apex ( X I 35) 



i, g. Young capsule ( X 13)- 



1, h. Capsule ripe, in dry state ( X X 3)- 



2, a-g. Bryum cylindrico-arcuatum. 

 2, a. Entire plant, natural size. 

 2, b, b. Leaves ( X 13)- 



2, c. Transverse section of a leaf ( X6o)- 



2, d. Basal areolation ( X !35)- 



2, e. Cells in the middle of a leaf ( X J 35)' 



2,f. Areolation of the apex ( X r 35)- 



2, g. Capsule in dry state ( X I 3)- 



3, a-f. Bryum leptodictyon. 



3, a. Entire plant, natural size. 



3, b, b. Leaves ( X 13)- 



3, c. Basal areolation ( X I 35)- 



3, d. Cells in the middle of a leaf ( X 135)- 



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

 3,_/". Capsule in moist state ( X 13)- 



4, a-g. Bryum pscudo-sfirtoni. 



4, a. Entire plant, natural size. 



4,3. Stem-leaf ( X 13)- 



4, c, c, c. Branch-leaves ( X I 3) 



4, d. Basal areolation ( X I 35)- 



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



4,/". Capsule ripe, in moist state ( X *3)- 



4, g. Capsule in dry state ( X I 3)- 



[358] 



