THE MARINE BOTANIST. 279 



an inch in lengthy which are again covered with a 

 thii'd set which are dichotomously divided, and, 

 spreading on all sides, give the plant a rounded 

 bushy character. To the naked eye this plant has 

 something the habit of C. arbuscula, while, in its 

 microscopic characters, it comes nearer C. corym- 

 bosum. It is, however, a much coarser plant than 

 the latter, void of gloss when dry, and of duller 

 colour." — Harv. Man., p. 182. 



C. pedicellatiim. Grows on rocks, &c., near low 

 water-mark. Not uncommon. Two to eight 

 inches high; stems bristle-like; branches naked, 

 or set with short, alternate, somewhat tufted, 

 sparingly-forked branchlets. Colour a fine red, 

 quickly given out in fresh water, and becoming a 

 dull brown when dry. 



Section 5. — Pulvinata. Filaments short, densely 

 tufted, forming cushion-like tufts, or spreading in 

 velvety patches. 

 C. Hothii. Spreads over the surface of rocks 



about half-tide level, and also grows on woodwork 



