PLATE XXX. 



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



NOTE. Nachet's objectives i, 3 and 5, oculars i and 2, with camera lucida. 

 All drawings are reduced % in photo-engraving. The magnification figures 

 here printed are true for the drawings as printed. 



FlGS. i, a-i. Cynodontium treleasei. 



i, a. Entire plant, natural size. 



i,*. Leaf (X 34)- 



i, c. Apex of the leaf ( X 135)- 



I, d. Perichsetial leaf ( X 34)- 



i, e. Capsule ( X *3)- 



i,/. Lid(X3)- 



i, g. Basal areolation of the leaf ( X : 35) 



i, h. Marginal areolation in the middle ( X 2 7)- 



1, /'. Areolation in the upper part ( X 2 7)- 



2, a-b, Dichodontium pellucidum kodiakanum. 

 2, a. Leaves (X J 3)- 



2, b. Apex of the leaf ( X 60)- 



3, a-f. Dicranum subflagellare. 

 3, a. Entire plant, natural size. 

 3) *. Leaf (X 26). 



3, c. Apex of the same ( X 1 35)- 

 3, d. Basal areolation ( X X 3S)- 



3, e. Areolation in the middle of a leaf ( X 2 7)- 

 3,y. Areolation in the upper part ( X 2 7)- 



4, a-e. Trichostomum cuspidatissimum. 

 4, a. Entire plant, natural size. 



4, b, b. Leaves ( X3S)- 

 4, c. Basal areolation ( X 1 35)- 

 4, d. Areolation in the middle of a leaf ( X I 35) 

 4, e. Areolation of the upper part ( X X 35)- 

 [348] (308) 



