128 SEA MOSSES. 



2. Frond regularly forkifig. 



(a.) Long, elastic, worm-like, axils wide and 

 rounded. Nemalion. 



{If.) Short, stiff, black, widely forking, uniform 

 size, not adhering to paper. Three or 

 four inches high. Polyides. 



(c.) Same outline, soft, adheres, rosy red. 



Scinaia. 

 3. Plants clothed with fine hairs. 



(a.) Stem robust; branches few, long and 

 mostly simple. All parts thickly clothed 

 with brilliantly colored pink or purple 

 fine hair, like " Chenille." Dasya. 



(J?.) Stem and branches slender, several times 

 divided ; hairs much paler, shorter and 

 less abundant. Spyridia. 



4. Fronds many times and finely divided, robust 

 or slender, mostly dark or brown. 



{a.) Ultimate ramuli, often in clumps or 

 minute brushes, black or brown. 



Rhodomela. 



{b.) Plants variously, but profusely branched, 

 mostly fine, often arborescent, fruit 

 vessels pear-shaped ; black, reddish or 

 light brown. Polysiphonia. 



