The Sub-genus Pleurozium 



segments split nearly the whole length; hair-like segments three, 

 slightly shorter. 



Spores. Mature in autumn. 



Distribution. North and South America, Europe and Asia. 



THE ARCHED FEATHER-MOSS 



HYPNUM Sub-genus PLEUROZIUM 



The species of this sub-genus increase yearly by arched 

 branches or by rigid erect growths, the branches are short, 

 unequal, and grow outward from the main stem, a character 

 which suggested the name Pleurozium, a compound of the 

 Greek TrXevpov, a side, and 6'|o9, a branch. 



The leaves on the stem are larger than those on the branches, 

 and are different in shape. Besides these leaves there are numer- 

 ous large and many-parted leaf-like organs (paraphyllia). 



The other characters of this sub-genus are similar to those of 

 the genus Hypnum. 



THE GLITTERING FEATHER-MOSS 

 HYPNUM (PLEUROZIUM) splendens, Hedw. 



(See Plate XXXI.) 



Habit and habitat. The Glittering Feather-moss is one of the 

 most beautiful species. It is common on rocks in deep woods, 

 in swampy places, on stumps, and on fallen trees. 



"Glittering with yellow, red and green, 

 As o'er the moss, with playful glide, 

 The sunbeams dance from side to side." 



Male plant. 

 H. splendens. 



307 



Paraphyllia. 



