S04? 25. Conferva. 1. HYDROPHYT7E. Pl.cell.apk. 
T breads in tufts, 3 or 4 inches long ; small branches short, 
scattered, greenish black, does not adhere in drying to 
either glass or paper, becomes blackish ; joints sometimes 
contracted alternately, 
4. Conferva crispata. Crisped crow silk. 
Fresh-water; threads branched, crisped, dark green; 
branches alternate, very remote ; joints cylindrical, four or 
six times as long as broad, when dried alternately com- 
pressed. 
Conferva crispata, Roth Cat. 1, 178; Engl. Bot. 2350. 
Conferva rivuiaris crispata, Agartlk Syn. 86. 
Stagnant pools; July. 
Tufts very dense, about 2 feet long; threads very closely 
entangled. 
5. Conferva Jlavescens. Yellowish crowsilk . 
Fresh-water ; threads very much branched, bent; branches 
alternate, divaricating; lateral twigs short, spreading hori- 
zontally ; joints cylindrical, 8 or 10 times as long as broad* 
Conferva flavescens, Roth Cat. 2, 224 ; Eng. Bot. 2088. 
Conferva pennalula, Dillwyn Syn. 64? 
Fresh-water ditches; summer. 
Tufts very thick; threads entangled, very slender, 9 inches 
long; branches attenuated, blunt. 
6. Conferva fracta . Broken crowsilk . 
Threads much branched, hairlike, stiff, bent; branches 
and twigs divaricating, mostly alternate; joints 4 to 8 times 
as long as broad, becoming oblong. 
Conferva bullosa, Lin. Sp. PI. 1637. 
Conferva vagabunda, Hudson FI. Angl. 601 ; Dillw. 5. 
Conferva divaricata, Roth Cat. 1, 179. 
Conferva fracta, FI. Ban. 946; Billw. 14; Engl. Bot. 2338. 
Ditches and pools. 
Tufts expanded, very thick, floating, buliated ; threads 
2 to 4 inches long ; branches attenuated, tip acute. 
/3. hirta. Knots obsolete, by reason of the echinellae pa- 
rasitic upon them. 
Conferva hirta, FI. Ban. 947. 
Conferva fracta hirta, Lyngbye Hydr. Ban. 152. 
y. elongaia. Marine threads straight ; upper branches. 
very long, simple. 
Conferva divaricata elongata, Roth Cat. 1, 181. 
Conferva fracta elongata, Lyngbye Hydr. Ban. 1 52. 
