314. 25. Conferva. 1. HYDROPHYTE. Pl.cell.aph. 
Sea-coasts on wood. 
Threads 6 to 9 inches long, appearing like polished iron 
when in the sea, when dry dark green ; lower joints short, 
alternately compressed when dry ; granules contracting in 
drying, and forming a black line on each side of the knot. 
44. Conferva tortuosa. Winding crowsilk. 
Threads simple, slender, rather stiff, curled, twisted, 
loosely entangled, dark green ; joints cylindrical, 3 times 
as long as broad. 
Conferva tortuosa, Dillwyn, 46 ; Engl. Bot. 2220. 
Sea-shore, or salt-water ditches. 
Tufts rather elastic ; knots pellucid. 
j3. ramosa. Threads with open lateral branches. 
45. Conferva ramosa. Branched conferva. 
Threads simple, very slender, curled, entangled, even 
soft, dark lurid green; joints even, rather longer than 
broad. 
Conferva impleva, Dillwyn , 46. 
Bangia viridis, FI. Dan. 1601. 
Rocks, salt-water ditches, and on marine plants. 
Tuj'ts closely entangled ; threads rather silky not stiff ; 
knots and edges hyaline; spores ovate. 
46. Conferva nummuloides. Money crowsilk. 
Threads simple, slender, brittle, yellowish brown ; joints 
shorter than broad, becoming close, beadlike, and nearly 
oval. 
Conferva nummuloides, Dillwyn , 44. 
Fragilaria nummuloides, Lyngbye Hydr. Dan. 184. 
Leaves of fresh-water plants. 
47. Conferva Youngana . Young’s crowsilk. 
Threads simple, slender, bristlelike, in tufts, weak, blunt, 
equal, light green ; joints as long as broad ; knots con- 
tracted. 
Conferva Youngana, Dillwyn , 102. 
Conferva isogona, Engl. Bot. 1930. 
Sea-shores, on wood and marine plants. 
Tufts yellowish green, half an inch long; threads rather 
stiff, not attenuated. 
