RED ALG^. 211 



times. In a plant two inches high, none of the 

 parts are over one-tenth of an inch wide, and 

 usually not more than one-sixteenth. The fertile 

 fronds have little hemispherical fruit-vessels scattered 

 over them. 



The substance of the frond is thin, but carti- 

 laginous and tough; the color, a darkish or brownish 

 red. It adheres imperfectly to paper. It grows along 

 the coast northward from Santa Barbara, not very 

 common, on rocks, between tides, at all seasons. 



Gymnogongrus Griffithsle, Ag. 



The color, size, and method of branching of 

 this plant is much the same as that of the last. 

 But it differs from that by not being flat, but quite 

 cylindrical. The frond is not thicker than a bristle. 

 It grows from one and one-half to two and one- 

 half inches high, in tufts, upon rocks, between tides, 

 each frond somewhat regularly forking three or four 

 times. The fruit is held in little, dark-colored, promi- 

 nent swellings, in the end branches. It has the same 

 geographical range, and the same habitat as the last. 



Gymnogongrus linearis, Ag. 



This is a much larger plant than either of the 

 others, some in my herbarium being not less than 



