220 HOW TO KNOW THE MOSSES 



a 



Hygrohypnum dilatatum (Wils.) Loesk. (Hypnum 

 dilatatum Wils.) may be known from other water- 

 loving mosses by the rounded, somewhat separated, 

 leaves. It occurs only in mountain streams and is not 

 common. The fruit is rare. 



Hygrohypnum eugyrium var. Mackayi (Schimp.) 

 Broth. (Hypnum eugyrium var. Mackayi Schimp.) is 

 probably the most common form in our range. The 

 leaves of this variety are not so strongly curved and 

 turned to one side as in the less frequent species H. 

 eugyrium, but this characteristic is often noticeable at 

 least at the ends of the branches. It often grows in 

 large patches on rocks in mountain streams, occurring 

 again in similar places along the coast. The fruit is 

 fairly common, sometimes abundant. The new growth 

 in the spring is bright green in contrast to the brown- 

 ish-green of the older parts, and the leaves, at least at 

 the ends of the branches, are slightly curved and 

 turned to one side. 



Hygrohypnum ochraceum (Turn.) Broth. {Hypnum 

 ochraceum Turn.) is variable in size, but usually has 1 

 the longest stems of the genus, sometimes reaching 4 

 inches. The leaves are generally curved and turned to 



