THE MARINE BOTANIST. 187 



HYPNEA. 



Name an alteration of Hypnuyn, the name of a genus of 

 mosses, in allusion to the mossy character of some of the 

 original species. 



Frond filiform^ cartilaginous, continuous, much 

 branclied, cellular 5 axis composed of minute cells, 

 surrounded by large ones, which gradually diminish 

 in size towards the outer surface. 



Fructification: 1. Spherical tubercles (coccidia) 

 either sessile or immersed in the ramuli. Tetra- 

 spores imbedded in the surface cells. 



HYPNEA PUEPURASCENS.— PURPLE 

 HYPNEA. 



Root composed of fibres. Stem naked at base 

 for a short space, then set with alternate spreading", 

 cylindrical, and fihform branches, which are often 

 again branched, giving the plant a bushy appear- 

 ance. Grows from six inches to two feet high. 

 Substance firm, scarcely adhering to paper. Colour 



