The English flora - SeaweedAfrica

—
Oteillaloria.] ALG^l CONFEUVOIDE^. 375
arachnoid straight or curved, striae wholly invisible.— Grev.
Fl. Edin. p. 304.
In tubs of water, in the stove of the Botanical Garden, Edinburgh,
Dr. Greville.—" Filaments under the highest power of the microscope,
appearing not larger than a human hair and of a very pale bluish colour.
It has the colour and external characters of O. major, but cannot be
confounded with it when magnified." Grev.
9. O. muscorum, Ag. {Moss- Oscillatorid); stratum dark aeruginose-green
shortly radiating creeping over mosses, filaments
Ag. Syst. Alg. p. 65.
'* On Hypnum ruscifolium, in rapid streams," Captain Carmkhael.—
thickish pale blue-green, striae distant
" Stratum 3—4 inches in extent, closely interwoven with the branches
and leaves of mosses, of a bluish-green colour and slightly lubricous.
Filaments a line or two in length, variously curved and radiating; stria?
at the distance of a diameter from each other." Carm. MSS.
10. O. turfdsa, Carm. ( Turf Oscillatoria); stratum pale verdigris-green
glaucous with an oehraceous substratum, filaments
very slender curved hyaline, striae distant.
" On a parcel of floating sods in an old turf-pit," Capt. Carmkhael.—
" This specks grows in a thick, intensely green layer, over a tough
slimy ochre-coloured substratum. It entirely enveloped the sods, some
of which were a foot and a half in diameter. . Filaments very slender,
more or less curved, and mostly hyaline at the point." Carm. It does
not adhere to paper in drying.
11. O. decorticans, Grev. (Ribband Oscillatoria); stratum
smooth glaucous-green membranaceous, filaments very slender
curved pale bluish-green, striae distant.— Grev. Fl. Edin.
p. 304, (excl. syn. Lyngb.)— Conferva decorticans, Dillw. Conf.
t, 26. (3. corticola ; stratum blackish green. O. corticola, Carm.
MSS.
'
Damp walls, rotten timber, Sec, common.— /3. " on the trunk of an
old sycamore, where the rain-water trickled down." CapL Carmichacl.
12. O. limbdta, Grev. (margined Oscillalor/r/); " filaments
thick flexuose Seruginose with a broad pellucid margin, loo-ely
interwoven in a dense dull eeruginose-green stratum." Grev,
Orypl. /V. Syn. p. 40. d t. 246, (O. rujxstris.)
()n perpendicular rocks, exposed to the trickling of water, rentland
hills ; Dr. Greville.—*' Tlant covering the tare of the rock tor several
inches together, and, win .1 old, peeling off in rather large pieces. Externally,
it i- mOStlj of a dull and often brownish-green colour; but within,
more or less of a verdigris-green, differing in intensity in different ;
here and there gelatinous and -eniilransparent. Filaments thick for
tlnir length, wr\ Rexuose, with a pellucid colourless limb, equal in
breadth to tin- coloured striated portion, which is of a pale verdignsgreen.
w
Gi\ v.
13. O. li/lonilis, ('arm. (Short Oscilhitorin ); stratum \ivi.l
eeruginose-green, filaments thick deep-green curved, stria