116 
CRYPTOGAMIA. ALGM. Conferva, 
C. fontina'lis. Threads shorter Ilian a finger; (joints four times as 
broad as long. E. Bot. 
{Dillw. 64— E. Bot. 2054. E.— FI. Dan. 651. 3—Dill. 2. 3— Mich. 89. 8. 
10 . 11 . 
Consisting of very fine., shorty unbranched, hair-like threads , crowded 
together. Varies in colour, in aerated waters ochrey and harder, in 
common springs brownish or dark coloured, in rivulets dark green. Dill. 
14. Threads an inch long, collected about a centre, which is yellowish, 
the extremities dark green. Linn. 
<Bb ownish Spring Conferva. Oscillatoria nigra. Agard. Hook. E.) 
On stones in rivulets and springs. In the New River near Hornsey. Dill. 
A. March—June. 
C. confkago'sa. Threads slimy, violet-coloured, not a finger s length. 
Huds. 592. Eighth, 976. 
Dill. 2. 4. 
The whole forms a slippery mucous substance. Threads short, so fine and 
so densely crowded together that no eye can distinguish whether they are 
entire or branched; shining when dry, and of a fine violet colour. It 
adheres to the paper without gum. Dill. 
(Violet Mucilaginous Conferva. E.) Near Llanberris, Wales. Dill. 
On rocks in the waterfalls on the mountain of Goatfield, in the Isle of 
Arran. Ljghtf. A. May—Oct. 
C. furca'ta. 
592. 
(2) Threads branched, not jointed. 
Threads branched at the ends: branches simple. Huds. 
Dill. 2. 6. 
Extremities two or three forked: pale, not shining, nearly white when dry. 
Dill. 
(Simply-branched Conferva, E.) Gently flowing brooks. 
A. Oct.—May. 
Var. 2. Threads shorter; thicker; and more branched. Dill. 
Dill. 3. 10. 
Threads two to four inches long, irregularly dispersed, not taking any 
determinate figure in the w r ater, about as thick as a hair ; green, greyish 
and not shining when dry. In spring and summer it is of muddy dull 
green ; in autumn it seems renovated, and changes to a more lively green. 
Dill. 
Ditches. Rivulet west of Marazion. Mr. Stackhouse. 
C. dichqt'oma. Threads forked: (capsules green, elliptical. E. Bot. 
Joints extremely long : capsules sessile. Dillw. 
Dillw. 15— E. Bot. 932. E.)— Dill. 3. 9. 
Grows upright, crowded together; dull green. Threads smooth, from 
four to twelve inches high, or more, forked, divisions beginning about the 
middle, and these again repeatedly divided and subdivided into other 
forks. Dill. (The fructification has seldom if ever been observed. 
Cavity of the stems here and there divided by transverse septa. Dr. 
Smith suspects this plant may prove to be a Chara. E. Bot. 
