304 25. Conferva. 1. HYDROPHYTZ. Pl. cell.aph. 
7 hreads 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 crowsilk. 
Fresh-water ; threads branched, crisped, dark green; 
Lranches 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 rivularis crispata, 4gardh Syn. 86. 
Stagnant pools; July. 
Tufts very dense, about 2 feet long; threads very closely 
entangled. 
5. Conferva flavescens. Yellowish crowsilk. 
Fyesh-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 pennatula, 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; joimts 4 to § times 
as long as broad, becoming oblong. 
Conferva bullosa, Lin, Sp. Pl. 1637. 
Conferva vagabunda, Hudson Fl. Angl. 601; Dillw. 5. 
Conferva divaricata, Roth Cat. 1,179. 
Conferva fracta, Fl. Dan. 946; Dillw. 14; Engl. Bot. 2338. 
Ditches and pools. 
Tufts expanded, very thick, floating, bullated ; threads 
% to 4 inches long; Lranches attenuated, tip acute. 
@. hirta. Knots obsolete, by reason of the echinelle pa- 
rasitic upon them. 
Conferva birta, Fl. Dan. 947. 
Conferva fracta hirta, Lyngbye Hydr. Dan, 152. 
y. elongata. Marine threads straight; upper branches 
very long, simple. 
Conferva divaricata elongata, Roth Cat. 1,181. 
Conferva fracta elongata, Lyngbye Hydr. Dan. 152, 
