Plhicell.aph. 1. HYDROPHYTE. 25: Conferva. 305 
0. marina. Threads thicker, greenish yellow. 
Conferva fracta marina, Roth Cat, 3,234. 
Conferva vagabunda, Roth I'l. Germ. 3, 465. 
Conferva refracta, Roth Cat. 2, 193. 
7. Conferva flexuosa. Bent crowsilk. 
Threads very much branched, rather stiff, dark green; 
branches bent, twigs mostly simple, alternately 2-ranked, 
spreading ; joits 2 or 3 times as long as broad. 
Conferva flexuosa, Fl. Dan. 882; Dillwyn, 10; Engl. Bot. 1944. 
Conferva rupestris flexuosa, Lyngbye Hydr. Dan. 156. 
Salt-water ditches, at the bottom; April. 
Threads eutangled, 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; 
jomts cylindrical,-4 times as long as broad; knots pellucid. 
Conferya marina trichoides, seu muscus marinus virens.tenuifolius, Dil- 
fen in Raii Syn. 60. ‘ 
Cenferva rupestris, Lin. Sp. Pl. 1637; Engl. Bot. 1699. 
Conferva glauca, Roth Cat. 2, 208. 
Conferva virgata, Roth Cat. i, 195. 
Ceramium asperum;. Roth Cat. 2, 1890. 
Ceramium rupestre, De Candolle Fl. Fr. 2, 42. 
Rocks by the sea; annual. y 
Lhreads verdigris green, in very thick bundles, repeatedly 
branched from base to tip; joimis, when dry, alternately 
compressed. 
9. Conferva diffusa. | Diffuse crowsilk. 
Threads forked, branched, rather zigzag, stiff, green ; 
branches. diffuse, remote; twigs short, approximate, blunt, 
joints cylindrical, four times as long as broad; kzots pel- 
lucid. 
Conferva. diffusa, Roth Cat. 2,207; Engl. Bot. 2289. 
Sea-shore: 
Base‘calious ; tufts dull green, loosely entangled, 2 to 
6 inches long; threads branched from the base, spreading. 
10. Conferva glomerata. Gloinerated: 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 
