131 



mark; also dredged in four or five fathoms. Annual. Bum- 

 mer and autumn. 

 This plant, one of the mosl universally diffused of the 

 Floridi a . and one of the comm< nesl on every shore \\ here 

 rows, puts on 10 man} deceptive appearances thai the 

 young botanist, and even the experienced observer, are 

 again and again deceived by it. As it grows from uear the 

 limit of hign-water to beyond the recess of the tide, i 

 exposed to a very variable amount of solar light and heat, 

 a circumstance which at once accounts for the varieties In 

 colour which the frond assumes. 



-'11. botryocarpum [Tlu bunch-fruited Ceramium) j filami 

 crooked at the base, robust, gradually attenuated upward-, 

 irregularly dichotomous, with numerous Lateral, mostly >im- 

 ple ramuli, the apices Btraighl ; articulation- coated with 

 coloured cellule-, unarmed, the lowermost twice a- long as 

 broad, the upper shorter than their breadth; dissepiments 

 constricted; tetraspores immersed in the articulations, 

 whorled; favellse globose, of small size, heaped together in 

 _ular clusters, borne on the lateral branchlets,. destitute 

 of involucral ramuli. Griff, in Herb. — ffarv. Phyc. Brit, pi, 

 215. (Atlas, PI Lin. Fig. 243.) 

 llah. On rocks and Algae, between tide-marks. Annual. Sum- 

 mer. 

 C. botryocarpum is known from ('. ruin',,) by its 

 markable fruit, consisting of a greai number oft< 

 heaped together like bunches of grapes; in this r< Bpeci it 

 agrees with C. Deslong champ sii. 1 have however i 

 Bionally found solitary, involucrate Pavellse, exactly similar 

 to those of ('. rubrum, on the same plants, which produced 

 clustered fruit on most (A' their branchlets. The colour IS 

 generally darker and more purple than in C. rubrum, and 

 the tips <»{' the branchlets are straight. These are the prin- 

 cipal characters on which ii blish the 



eies. 

 228. decurrens [The decurn ■ i) j frond robust, 



dually attenuated upward-, dichotomOUS, with few 



branchlets, the apices hooked inward-; articulations par- 

 tially coated with coloured cellules, which extend fin 

 (sepimenl at each rwil, but leave a colourless pi Uuci I 

 in the centre of the articulation-. Lowermost articul 

 twice as long as broad; upperverj Bhort, h 

 62 (\M ls, PI. Id. , 

 .1 pens, Ktz. 



