PLATE XXIII. 



Figs, i, a-d. Hyp7iu7n fseudostramineum. 



I, a, a. Leaves ( X iS)- 



I, b. Lower part of the costa ( X 130) • 



I, c. Areolation in the middle of a leaf ( X 225). 



1, d. Areolation of the apex of a leaf ( X225). 



2, a-h. Hypiium plesiostramincum . 

 2, a. Entire plant, natural size. 

 2, b, b. Lower leaves ( X iS)- 



2, c. Lower part of the costa ( X 130)- 



i,d. Upper leaf (XiS). 



2, c. Branch leaf ( X 18). 



I1 f. Auricle and basal areolation of a leaf ( X 225). 



2,^. Cells in the middle ( X 225). 



2, //. Areolation of the apex ( X225). 



3, a-e. Me e sea tschuctschica. 



3, a. Entire plant, natural size. 



3, b. Part of a stem ( X 3)- 



3, f, c. Leaves ( X 13)- 



3, d. Marginal areolation in the middle ( X 135) • 



3, e. Areolation of the apex ( X I35)- 



4, a-c. Brachythecium rejiexum pacificum. 

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



4, b. Basal areolation ( X i3S)- 



4, c. Marginal areolation in the middle ( X i3'?)' 



(368) 



