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Pl.cellaph. 1. HYDROPHYTiE. 25. Conferva. 30»
23. Conferva Brownii. Brown's crowsilk,
Tufls close; threads much branched, rather stiff, short,
green; hranches sh'ghtly 1 -rowed, bkint ; joiw/5 4 times as
long as broad, rather thicker above.
Conferva Brownii, Dilltetjn, 5S.
On wet rocks in caves.
Ttifi flat or convex ; threads upright, about the eighth
of an inch long, rather thick, resembling those of c. sega-
gropilaris.
24-. Conferva velutina. Velvetly crowsilk,
Tift close, green, velvetty; threads branched, bent, en~
tangled at bottom, rooting, hj'aline, at top blunt ; joints
longer than broad.
Byssus fenerrima viridis, ve'utum referens, Dillen in Eaii Syn, 56, 1,
Byssns velutina, Lin. Sp, PL 1638.
Conferva varia, Hoth Cat. 3, 301.
Conferva velutina, Dillwyn, 77 ; Engl. Bot. 1556.
On the ground in damp places.
Tifts very close; hranches alternate, bent, lower distant,
tv/igs nearly one-rowed, short, bent, blunt, diffuses a sweet
fragrance not only when growing, but also for some time
after being dried.
25. Conferva cryptarum. Cave crowsilk.
Threads green, entangled, much branched ; branches
forked, divaricating, pointed; /oi/z/^ twice as long as broad,
rather gibbous.
Conferva cryptarum, Dillwyn, 59 ;
Engl. Bot. 2588.
Conferva muscicola cryptarum, ^g-arrfA Syn. 73.
Caves and caverns.
Branches recurved, entangled; when dry rather stififj
elastic, pellucid.
26. Conferva umlrosa. Shade crowsilk.
Tift blackish green, velvetty ; threads entangled, branched,
brittle, branches upright, blunt: joints longer than
broad ; those of the tips inflated, as long as broad.
Conferva umbrosa. Roth Cat. 1, 191.
Conferva arenaria, Roth Cat- 2, 217.
Damp shady places; summer.
Tifts very close ; threads short ; hranches rather crowded.