PLATE XXXI. 

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



Figs, i, a—e, Trickostomum sithanum. 



I, a. Entire plant, natural size. 



I, b, b. Leaves ( X 13) • 



I, c. Basal areolation of a leaf ( X i35)' 



I, d. Areolation in the middle ( X ^35)' 



1, e. Areolation in the upper part ( X i3S)« 



2, a-i, Pottia heimii heringiayia. 

 2, a. Entire plant, natural size. 

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



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



2, d. Part of the same ( X "^ZS)' 



2, e. Basal areolation of the leaf ( X i35)« 



2,f. Areolation in the middle ( X I35)- 



2, g-. Areolation of the apex ( X i35)- 



2, h. Capsule in moist state ( X 13)' 



2, /. Capsule ripe, in dry state ( X I3)« 



3, a-i. Barbula brachypoda. 



3, a. Entire plant, natural size. 



3, 3, b, b. Lower leaves (X is)- 



3, c, c. Upper leaves ( X 13)' 



3, d, d, Perichsetial leaves ( X I3)' 



3, e. Basal areolation of the leaf ( X 135)' 



3. y. Areolation in the middle ( X i35)' 



3, £■. Areolation of the upper part ( X I35)« 



3, /i. Capsule in moist state ( X ^S)- 



3, i. Portion of the annulus ( X 60). 

 [350] (310) 



