HYPNACEAE 227 



idium, another fern-like moss, see under that genus 

 (p. 204). 



a. 2 



Plants growing in thin, loose mats on the ground and on 

 stones in mountainous woods; bright green; not uncom- 

 mon; fruit rare. 



Stems sleitder; prostrate or ascending; up to 6 inches long; 

 pinnately or irregularly bipinnately branched, occasionally 

 tripinnate; branches unequal, 

 frequently drooping ; tips very 

 slender. 



Leaves small, straight, erect ; 

 sometimes too small to be 

 seen; bright green. 



Seta 1-2 inches long; red- 

 dish. 



Capsule short-cylindrical, 

 inclined; mature in spring. 



Operculum cone-shaped. 



Range, Newfoundland to 

 Alaska, the northern United 

 States and southward in the 

 mountains; Europe; Asia. 



Uylocomium umbratum 



Hylocomium umbratum 

 (Ehrh.) BPy'ol. Eur. {Hyp- 

 num umbratum Ehrh.) oc- 

 curs much less frequently than //. prolifcrum. The 

 stems are more slender, less regularly hipinnate, and 

 the tips of the branches are very fine, often drooping, 

 and sometimes rooting. 



