CONFERVACEJE. 
83 
18. Cladophora diffusa (?) ; filaments capillary, elongate, loosely tufted, somewhat 
rigid, full green, flexuous, much branched ; branches distant, irregularly subdivided, 
nearly naked, or furnished toward the ends with a few short secund ramuli ; articula- 
tions 3-4 times as long as broad. Haw. Pliyc. Brit. t. 130 (?) &c. 
Hab. New York Sound, Messrs. Walters , Pike , fyc. California, Mr. A. D. Frye. 
(v. s.) 
Tufts loose. Filaments 6-12 inches long or more, generally so rigid as not to col- 
lapse when removed from the water, capillary or somewhat more robust, much and 
irregularly branched. Branches distant, often an inch or more apart, erecto-patent, 
naked in the lower portion or very sparingly ramulose, and sometimes naked throughout 
and little subdivided. Generally, however, the upper divisions are more repeatedly and 
more closely branched, and their branches furnished with a few short, secund, pectinate 
ramuli. On some specimens these are very few and confined to the apices ; on others 
they are more abundant. 
Recognised chiefly by its naked and distant branches, nearly destitute of ramuli. 
The more ramulose specimens seem gradually to glide off into C. Icetevirens, I quote 
the figure in Pliyc. Brit, with a mark of doubt, and refrain from quoting other authori- 
ties, because I am not quite sure of the specific identity of the American and European 
specimens. 
Sect. 2. Species found in brackish water, or in fresh-water ponds and streams. 
19. Cladophora fracta , FI. Dan. ; tufts irregular, entangled, often detached and 
then forming floating strata, dull green ; filaments rather rigid, distantly branched, the 
lesser branches somewhat dichotomous, spreading, with very wide axils ; the ramuli 
few, alternate or secund ; articulations 3-6 times as long as broad, at first cylindrical, 
then elliptical, with contracted nodes. FI. Dan.t. 946. Dillw. Conf. t. 14. E. Bot. 
t. 2338. Lyngb. Hyd. Dan. t. 52. Haw. Phye. Brit. t. 294. Kiitz. Sp. Alg. 
p. 410. 
Hab. In salt water ditches and ponds, also in brackish or fresh water. Rhode 
Island, and in the Hudson, at West Point , Prof. Bailey. Beesley’s Point, Mr. Ash- 
mead. Near New York, Mr. Walters, (v. v.) 
This is at first tufted and attached to sticks or stones, but afterwards occurs floating, 
and then forms strata of considerable extent. Filaments capillary, several inches long, 
loosely tufted or bundled together, much but distantly branched, the branches widely 
spreading at very obtuse angles, and again and again dividing, all the minor divisions 
being equally patent, and the angles equally wide. The lesser branches sometimes bear 
a few secund ramuli, and are sometimes quite naked. Colour , at first a grass green, but 
gradually becoming darker. Substance, membranaceous and rather rigid, seldom quite 
adhering to paper in drying, and readily detached. 
