[ 1905 ]
F U C U S membraniiolius.
Membranous-leaved Fncus.
' f t
CRYPTOGAMIA Algae.
Gen. Char. Seeds produced in clustered tubercles,
which burst at their summits.
Spec. Char. Stalk cylindrical, branched. Leaflets
membranous, wedge-shaped, palmate, jagged, obtuse,
without ribs. Tubercles lateral, ovate, somewhat
stalked.
Syn. F ucus membranifolius. Gooden, and IVoodw. T r.
o f Linn. Soc. v. 3. 120. t. 16. Turn. Syn. 25.
Hist. Fucor. v. 2 . 6. t. 74. W ith . v. 4. 106.
Hull. 317.
(3. F. ceranoides y . Huds. 583.
F. parvus, cauliculis teretibus, summitatibus membra-
naceis dilatatis et laceratis. R a il Syn. 4 4 ; excluding
Morison’s syn.
y . F. fimbriatus. Huds. 574. W ith .v.4 !. 1 0 5 ; “ excluding
Gmelin’s syn.” Turn.
N O T rare on the'coasts of Britain, Waring fruit in winter.
Mr. Turner considers it as perennial.- . .
From a small roundish disk arise several fronds, usually
near a span high, of a dull brownish red, greenish in decay,
whose stalks are horny, much and irregularly branched, cylindrical,
sometimes flattened and dilated upwards. Leaflets
numerous, more or less stalked, membranous inclining to
coriaceous, without ribs or veins, wedge-shaped but palmate,
or in some cases pinnatifid ; the summits obtuse and jagged;
the margins entire, except in variety y, in which they are
finely fringed. Fructification usually situated on the upper
part of the stalks, sometimes on the surface or edges of the
leaflets, stalked, though sometimes but slightly, ovate, small,
each tubercle containing a globular mass of minute seeds.
Mr. Turner has also remarked oblong, dark-red, slightly elevated
spots, on .both sides of the disk of some leaflets, consisting
of dense jointed fibres like those in the tubercles of
F. Griffithsice, t. 1926, which therefore he considers as belonging
to the fructification.