PL cell. aph. 1. HYDROPHYTE. 25. Conferva. 305 
& marina . Threads thicker, greenish yellow. 
Conferva fracta marina, Roth Cat. 3,234. 
Conferva vagabunda, Roth Ft. Germ. 3, 465. 
Conferva refracta, Roth Cat. 2, 193. 
7. Conferva Jiexuosa. Bent crowsilk . 
Threads very much branched, rather stiff, dark green; 
branches bent, twigs mostly simple, alternately 2-ranked, 
spreading; joints 2 or 3 times as long as broad. 
Conferva flexuosa, FI. Dan. 882; Dillwyn , 10; Engl. Bot. 1944. 
Conferva rupestris flexuosa, Lyngbye Hydr. Dan. 156. 
Salt-water ditches, at the bottom ; April. 
Threads entangled, main threads once or twice branched ; 
knots dark. 
8. Conferva rupestris. Rock crowsilk. 
Threads very much branched, in bundles, stiff, slender, 
dull green ; branches adpressed, nearly 3-forked, blunt ; 
joints cylindrical, 4 times as long as broad ; knots pellucid. 
Conferva marina triclioides, seu muscus marinus virens tenuifolius, Dil- 
len in Raii Syn. 60. 
Conferva rupestris, Lin. Sp. PI. 1637 ; Engl. Bot. 1699. 
Conferva glauca, Roth Cat. 2, 208. 
Conferva virgata, Roth Cat. 1, 195. 
Ceramium asperum, Roth Cat. 2, 180. 
Ceram ium rupestre, De Candolle. FI. Fr. 2, 42. 
Rocks by the sea ; annual. 
Threads verdigris green, in very thick bundles, repeatedly 
branched from base to tip ; joints , when dry, alternately 
compressed. 
9. Conferva diffusa. Diffuse crowsilk. 
Threads forked, branched, rather zigzag, stifR, green ; 
branches diffuse, remote; twigs short, approximate, blunt, 
joints cylindrical, four times as long as broad ; knots pel- 
lucid. 
Conferva diffusa, Roth Cat. 2, 207 ; Engl. Bot. 2289. 
Sea- shore. 
Base callous ; tufts dull green, loosely entangled, 2 to 
6 inches long; threads branched from the base, spreading. 
10. Conferva glomer at a. Glomerated crowsilk. 
Threads much branched, rather stiff, green; branches 
alternate; twigs short, rather bundled, pencilshape, rather 
blunt; joints 4 times as long as broad. 
VOL. i. x 
