FONTINALACEAE 



177 



The fresh-water Algae, often found in the same 

 streams with Fontinalis, are long and thread-like, 

 somewhat slimy, and do not have leaves. 



44. DICHELYMA Myr. (Di-che-ly-ma) 



A small genus of wide distribution. Name derived 

 from two Greek words, '' to halve " and *' a covering," 

 referring to the one-sided calyptra. 



Dichelyma capillaceum (Dill.) Schimp. is the com- 

 mon species, found on bushes, sticks, etc., in or around 

 the edges of ponds, and on the ground 

 in swamps; fruit common. ll ( I 



Plants matted together, commonly 

 found on sticks or dead leaves in water 

 or at edge of water; yellowish-green above, 

 brownish below. 



Stems long, slender, often over 3 inches; 

 branched. 



Leaves long, hair-like, straight or curved, 

 especially at ends of branches, erect or 

 spreading, sometimes turned to one side; 

 yellowish-green; usually glossy in new 

 growth. 



Seta less than Yz inch long, wrapped in 

 long leaves. 



Capsule long-cylindrical, inclined or 

 erect ; yellowish-brown ; mature in summer. 



Operciiliini conc-shaj^cd. 



Range, New Brunswick to Ontario and Pennsylvania; 

 Europe. 



Dichelyma capilla- 

 ceum 



Capsule enlarged. 



