The English flora - SeaweedAfrica

398 ALGJE GLOIOCLADE.E. [Nostoc.
red colour, floating in the water. Granules mostly in pairs, rather large,
globular, with a pellucid limbus." Carm. MSS.
10. P. adnata, Lyngb. (brownish-yellow Palmella); frond
shapeless rugose brownish-yellow, granules globose brown.
Ag. Syst. Alg. p. 14. Lyngb. Hydroph. Dan. t. 69.— Tremella
adnata, Huds. ?
On alpine rocks.— Admitted into Loudon's Encyclopaedia, I presume
on the authority of Agardh's doubtful reference to Hudson; but I have
seen no specimens.
95. Echinella. Ach. Echinella.
A globose hyaline gelatine, filled with radiating elliptical
corpuscules.—Name ; Echinus, the Hedgehog—in allusion to
the bristly appearance of its radiating particles.—Minute
objects, intermediate between the vegetable and animal kingdoms,
to neither of which, exclusively, do they seem to belong.
1. E. articuldta, Ag. {articulated Echinella); " glaucous,
stems jointed undivided spreading every way from a centre and
forming a globe." Sm.—Ag. Syst. Alg. p. 16.— Conferva
echinata, E. Bot. t. 1378.
In a lake in Anglesea, Rev. H. Davies.— " It covers the surface of the
water in June and July, and consists of innumerable minute globules, of
a glaucous or verdigris-green colour, all nearly of a size." Sm.
2. E. rotdta, Grev. {circular Echinella); " frond plane circular
divided by a line passing through the centre, each portion
composed of radiating segments cleft nearly to the central line."
Grev. in litt.—E. radiosa, Carm. MSS.
In fresh-water, among Confervce and aquatic mosses, Capt. Carmichael.
— Minute, scattered, bright transparent green.
3. E. oblonga, Grev. {oblong Echinella); " frond compressed
oblong crenato-pinnatifid and lobed, divided transversely in the
middle almost to the centre." Grev. in litt.
With the last ; Capt. Carmichael.— Pale transparent green. " These
are animals, instead of plants, if the faculty of locomotion will entitle
them to that rank." Carm. MSS.
96. Nostoc. Vauch. Nostoc.
A gelatinous or coriaceous, polymorphous frond; filled
with crisped, moniliform filaments, which are finally dissolved
into spomdes.—The meaning of the name is unexplained ; it
was first used by Paracelsus, and adopted by Vaucher for the
present tribe, which before that time was included in Tremella.
It is closely allied to Palmella, from which it differs in the mo-
niliform arrangement of its sporules.
1. Olive-green, terrestrial.
1. N. commune, Vauch. {common Nostoc); terrestrial, frond
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