PLATE XXXVI. 



[Proc. Wash. Acad. Sci., Vol. IV, PL XIX.] 



FIGS, i, a-f. Bryum atcleostomum. 



I, a. Entire plant, natural size. 



i, b, b. Leaves ( X J 3)- 



i, c. Apex of a leaf ( X 60). 



I, d. Basal areolation of the same ( X I 35)- 



1, c. Marginal areolation, in the middle ( X I 35)- 

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



2, a-g. Bryum hetcrogynum. 



2, a. Female plant, natural size. 



2, b. Male plant, natural size. 



2, c. Leaf of the female plant ( X I 3)- 



2, d. Apex of the same ( X 60). 



2, e. Basal areolation ( X J 35)- 



2,/ Cells in the middle ( X I35)- 



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



3, a-g- Bryum laurentianum. 



3, a. Entire plant, natural size. 



3, b, b. Stem-leaves ( X 2 ^). 



3, b'. Branch-leaf ( X 26). 



3, c. Transverse section of a leaf ( X 60). 



3, d. Transverse section of the costa ( X 270). 



3, e. Basal areolation ( X J 35)- 



3,_/". Marginal areolation in the middle ( X 1 35)- 



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

 [360] (320) 



