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P l a t e XXX.
CLADOPHORA BROWNII, Ilarv.
Gen. C h a r . Filaments green, jointed, attaclied, uniform, branched. F ru it
aggregated granules or zoospores, contained in the joints, having, at
some period, a proper ciliary motion. C la d o p h o r a {Kiitz.)—from
(cXdSof, a branch, and <j>ope<o, to bear; a b ran d lin g plant.
C l a d o ph o r a iJrom ri ; fflaments forming dense, on shion-Hke tufts, erect,
rigid, flexuous, elastic, slightly branched ; branches few, long, subsimple,
secund ; axils acute ; articulations four or five times longer
than broad, the lower ones tliickened upwards, the upper cylindrical.
C l a d o ph o r a glomerata, y. Brownii, Hass. Brit. Fr. Wat. Alg. p. 213.
Co n f e r v a Brownii, Billw. Suppl. t. B. Ag. Syst. Alg. p. 105. Harv. in Hook.
Br. FI. 2. p. 355. Harv. in Macìe. FI. Hib. part 3. p. 228. Harv. Man.
p. 134. Wyatt, Alg. Banm. N. 225. E . Bot. Suppl. t. 2879.
C o n fe r v a p u lv in a ta , B. Br. MSS.
H a b . In maritime situations exposed to the alternate influence of salt and
fresh water ; rare. Perennial. On wet rocks in a cave near Dunrea,
B . Brown, Esq. On rocks at the entrance of a small cave beyond
Black Castle, Wicklow (1833), W. H . H . Cornwall Coast, Mr. B alfs.
G e o g r . D is t r .' Ireland. Cornwall.
D e s c r . Tufts very dense, cushion-like, spreading over the rocks in patches of
indefinite extent, one to several inches in breadth, from half an inch to
nearly an inch in thickness in the middle, gradually thinner towards the
edges, of a black-green colour when growing, but exhibiting, on having the
water expressed, aud being held between the eye and the light, a beautiful
clear, yellow-green tint. Filaments so matted together that it is difficult
to separate a single thread, very rigid, erect, but apparently originating in a
mass of creeping, branched, densely matted fibres, which form the base of
the tufts, flexuous, frregularly branched ; the branches long, simple, seound
or subdichotomous. Articulations tolerably unifo rm in length, the lower
ones clavate, the upper cylindrical ; Joints contracted. Endochrome dense.
Perhaps I transgress the true limits of a work on marine Algæ
by figuring in it a plant which belongs as much to the land as to
the sea, and which is only occasionally wet with sea-water. I
have two reasons for doing so. First, because tbe upper figure
in the ‘ Supplement to Fnglish Botany’, which was obviously
made from dried specimens by an artist who had never seen the
living plant, is so unlike the living C. Brownii that it is quite
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