Eeevo Bfnhtui. *1U<rre,inp
P l a t e CXCVI.
CLADOPHORA GLAUCLSCENS, Griff.
G e n . C h a r . Filaments green, jomted, uniform, branched. F m it, aggregated
granules or zoospores, contained in the joints, having, at some
period, a proper cüiary motion. C l a d o p h o r a [K iitz .),— from
kXoSos, a hraneh, and ipopsco, to bear.
C l a d o p h o r a glaucescens; tufts dense, glaucous-green, subfastigiate; filaments
very slender, flexuous, excessively branched; branches rather
straight, erect, or erecto-patent, the lesser ones furnished with close,
very erect, straight, elongated ramrdi; articulations nearly uniform,
about thrice as long as broad.
Conperva glaucescens, Grff. in Wyatt, J ig . Banm,. no. 195. H a n . Man.
p. 139.
H a b . On rocks and stones, between tide marks. Annual. Summer.
Not uncommon. Torquay, Mrs. Wyatt. Falmouth Bay, Miss Warren.
Mounts Bay, Mr. R a lfs. Mangan’s Bay, M k s B a ll. Portmarnock,
M r. Moore. Coast of Down, M r. W. Thompson. Rooks beyond
Kingstown Harbour, abundant in May, W. H . H.
Geogr. D is t r . British Islands.
D esor. Root, a small callus. Filaments very slender, densely tufted, two to
four inches long, sometimes forming oircnmscribed tufts, sometimes more
unequally distributed, excessively branched; the principal branches variously
curved or irregularly bent, the lesser ones more and more straight and erect,
alternate, or secund, veiy rarely opposite, repeatedly divided. Ultimate
ramuli usually elongated, consisting of several cells, secund, erect, close
together. Articulations uniform iu all parts of the frond, about thrice as
long as broad, flUed witb a pale green, not very dense endochrome, which
is more or less dissipated in drying. Substance membranaceous, rather
soft, but not flaccid, adhering, but not very closely, to paper in drying.
When dry, the colour is sometimes a pale green, sometimes darker; and
the filaments preserve a slight gloss.
This is one of the many beautiful plants for whose correct
determination the Phycologist is indebted to the accm’ate eye
and discriminating judgment of Mrs. Griffiths, who first published
it in Mrs. Wyatt’s excellent Pasciculi of Devonshu’e Algae.
It is difficult to say to which of the British species of Cladophora
it is most closely allied. At one time I regarded it as belonging to
the same group as C. arcta, and even thought that it might prove
to be merely a state of that species : but a more careful examin-
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