THE MARINE BOTANIST. 65 



LITOSIPHON. 



Name meaning a slender tube. 



Frond unbranched, cylindrical, filiform, cartila- 

 ginous, sub-solid ; at length tubular ; composed of 

 several rows of cells ; the surface areolated. 



Fructification, Spores either singly, or four or 

 more together, scattered irregularly over the surface 

 of the frond. 



LITOSIPHON PUSILLUS.— SILKY LITOSI- 

 PHON. 



Fronds two or six inches high, parasitical on 

 Chorda Jilum, often so closely set on the frond 

 of that plant as to give it the appearance of a bottle 

 brush- Spores round, prominent, scattered, or one 

 or two together. Annual. Summer. 



