82 CONFERVACE^. 



and much branched, not matted together ; main and lesser branches remarkably 

 flexuous, the angles rounded, and the filaments arcuate ; branching irregular, frequently 

 trichotomous, the lesser ramuli secund or opposite, and their ultimate divisions pectinate, 

 somewhat corymbose and crowded toward the apices ; articulations cylindrical, hyaline, 

 6-8 times as long as broad. 



Hab. Growing on littoral corals, at Key West, W. H. H. (v. v.) 



Filaments 2-3 inches long, rather loosely tufted, excessively slender, and soft, but 

 not in the least gelatinous, very much branched, remarkably bent ; the filaments arcuate 

 between each ramification. The branching is irregular. In the principal and also in 

 the lesser divisions it is frequently trichotomous, three branches springing from a node ; 

 but the branches are almost as often alternate or sub-dichotomous. In the medial 

 portion of the frond the forkings are sub-distant ; they become more frequent upwards, 

 and the branches generally end in closely set, but scarcely fasciculate pectinated ramuli, 

 which are either opposite, alternate, or secund. The ultimate ramuli are erect and 

 incurved. Articulations seldom less than six times as long as broad, sometimes more, 

 with a very pale, watery endochrome, which is dissipated in drying. Notwithstanding 

 its tenuity this plant does not adhere closely to paper. 



***** LvETEViRENTES. Filaments loosely tufted, robust, and somewhat firm or rigid, 

 vivid-green. 



17. Cladophora Icetevirens, Dillw. ; filaments much branched, bushy, forming tufts of 

 a transparent, yellow-green colour (faded and without gloss when dry) ; branches 

 erecto-patent, crowded, repeatedly divided, flexuous, the lesser divisions often opposite ; 

 ultimate ramuli secund, blunt, of few articulations ; articulations of the branches six 

 times, of the ramuli thrice as long as broad. Dillw. Conf. t. 48. E. Bot. 1. 1 8.54. Harv. 

 Fhyc.BriLt.]90. Wyatt, Alg. Danm. No. 143. Kutz. Sp. Alg. p. AOO. Conf. 

 glomerata var. marina, Roth. Cat. Bot. S,p. 237. 



Hab. In rock pools between tide marks. New York Bay, Messrs. Hooper ^- Walters. 

 Boston, Dr. Durkee. California, Dr. Coulter, (v. v.) 



2\ifts feathery. Filaments 3-6 inches long or more, capillary, much branched, main 

 filaments flexuous or angularly bent, set with altei-nate or scattered, occasionally oppo- 

 site, repeatedly decompound patent branches, which are densely set with lesser branches 

 and ramuli, all of which are patent and often recurved. Lesser and penultimate 

 branches mostly secund, sometimes opposite or fasciculate, their ultimate divisions 

 pectinated with short closely set ramuli on the upper side. Articulations of the main 

 branches 4-6 or 8 times, of the ramuli 3-4 times as long as broad. Colotir, a full grass 

 green. Substance, not very soft. It adheres, but not strongly, to paper in drying. 



