THE MARINE BOTANIST. 113 



POLYSIPHONIA FIBRATA.— FIBROUS- 

 BRANCHED POLYSIPHONIA. 



With many slender branches, densely tufted, of a 

 reddish-brown colour- very soon decomposing in 

 fresh water, and extremely soft and tender in sub- 

 stance. The ramuli produce delicate fibres at their 

 tips, to which are attached the antheridia in tufts 

 of a golden-yellow colour. Grows on rocks, stones, 

 and algae, between tide-marks. Not uncommon. 

 Annual. Summer and Autumn. 



POLYSIPHONIA ELONGATA.— ^^ LOBSTER- 

 HORN" POLYSIPHONIA. 



Stems cartilaginous, irregularly branched; during 

 the summer clothed with slender many-tipped 

 crimson ramuli 5 these fall off at the approach of 

 winter, when the branches appear bare and broken 

 at the tips. Colour brownish-red : the ramuh 

 crimson. Substance in the stem rigid, in the ramuli 

 soft, and adhering well to paper. Grows on stones, 

 shells, corallines, &c. Biennial. Spring. 



