198 SEA MOSSES. 



inches high, with a spread of its multitude of branches 

 all in one plane, in a general fan-shaped outline, 

 quite as wide as it is high. The flattened branches 

 spread out widely from the two edges of the main 

 stem, and divide and sub-divide profusely and irreg- 

 ularly. The only distinguishing point in its outward 

 appearance is the fact that all the lesser branches 

 are bordered along both edges by a considerable 

 number of short, inward-curved, forward-pointing, 

 spine-like ramuli, of various lengths, from one-tenth 

 to one-fourth of an inch, short and long mixed in- 

 discriminately. There seems also to be an utter lack 

 of system in the branching of the plant. Its color 

 is a dark red, becoming much darker in drying. It 

 adheres imperfectly to paper. 



Genus.— FARLOWJA, Ag. 



Farlowia compressa, Ag. 

 This genus, which Prof. Agardh has named in 

 honor of our countryman. Dr. Farlow, of Harvatd 

 College, who is doing so much fine work in per- 

 fecting, and disseminating a knowledge of Amer- 

 ican Algse, comprises two species, but one of which 

 I shall undertake to give an account of. 



