The English flora - SeaweedAfrica

Lyngbya.) ALOfi CONFERVOiDE^. 369
apices cohering in rigid erect tooth-like fascicles. Scytonema
hydnoides, Carm. MSS. cum icon.
On the clayey sea-shore, at the flood-level. Appin, Captain Carrnichael.
— " This species occurs in thin dark olive-coloured (black-green under
the microscope) patches, from half an inch to 2— 3 inches in diameter.
Filaments much branched, the lower part interwoven into a thin stratum
while theterminal branches
mixed with the clay over which they creep ;
stand erect in close conical tufts, resembling the teeth of a Hydnum."
Carm. MSS.— \ have ventured to remove this plant from the genus
Scytonema, in which it was placed by its acute discoverer, because the
branches are oppositional, and the microscopic colour of the filaments is
of that peculiar shade of green so prevalent in the Genera Calothrix and
Oscillatoria,
nema.
and which does not occur in any acknowledged Scyto-
11. C. distorta, Ag. {large verdigris Calothrix'); filaments
elongated bluish-green forming large tufts mucous somewhat
rigid branched, branches erect flexuose. Ag. Syst. Alg.p. ~'2.—
Conferva distorta, Lillw. Conf. t. 22, and Suppl. t. A.—E. Bot.
t. 2577.
" In fresh-water, on stems, &c, rather rare.— Filaments half to one inch
high, forming continuous tufts about the stalks on which they grow,
of a dark-green hue (when dry of an intensely verdigris or blue-green
colour), slender, bundled, curved and tortuous, more or less branched
by apposition, the branches suhsimple, elongated. Stria: more or less evident,
in some specimens inconspicuous.
12. C. mirdbilis, Ag. (.small verdigris Calothrix); filaments
abort dark bluish-green curvato-flexvoae and geniculate variously
united, forming lax globular tufts.
Ag. Syst. Alg. />. 72.
— Conferva mirahilis, DUlw. Conf t. 96. (not of E. Bot. i. 2219.)
On mosses, &c, in small streams; rare?— Filaments forming minute
tufts, half an inch in diameter, of a dark bluish-green colour,
irregularly contorted, forming geniculations with very obtuse angles,
here and there appositions! iy united into a vague net-like ramification,
apices obtuse. I am but little acquainted with this species, bating described
it from a specimen marked by Dillwyn, whose figure U very
characteristic
13. ('. caspitula, Uarv. (globvictr-tuJUd Calotkria >.• filaments
forming close convex tufts blackish-green flexuose Aaooid tuae
here and there spuriously branched.
Marine rocks, below high-water mark. Miltowu Malbay, rare, Jr. //.
Harvey*—Tufta wery cohma, I } J— inch in diameter, deep blackishgreen,
flaccid, growing on the naked rock or attached to coralline-. &c
Filaments denselj packed together, often twisted round each other in
small bundles, either simple or paeudorbranched, obtuse, cylindrical,
branches erect Striae very strongly marked and closeh set Not unlike
Rivularia atra in it ^ habit, at a short distance, but ita softness and
—
flaccidit) will at once distinguish it to the touch.
71. L\ \..i,-, \. .
iff,
L] ngb\.i.
I '/ In mi R/!r destitute of a mucous layer, inr, flexible, elongated,
continuous, decumbent. Endochronu (green or purple) deni
2 D
—