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LAMINARIA d e b i l i s .
D w a r f Laminaria.
C l a s s a n d O r d e r CRYPTOGAMIA ALGÆ, Linn N a t . O r d . ALGÆ, Jms.
GENERIC character.
Frons fibrose radicata, stipitata, membranacea vel coriacea ; fructus, granula
pyriformia in lamina frondis, soros máximos formantia.—^Agardh.
Fronds stipitate, provided with fibrous radicles, membranaceous, or coriaceous
: fructification, pyriform granules forming large sori in the substance
o f the frond.
L aminaria debilis;
dilatato.
SPECIFIC character.
ite setaceo infrondem membranaceam cuneato<ib1mgam
L. stipes setaceous, dilating into a membranaceous, oblong, sometvhat
wedge-shaped frond.
L aminahia debilis, Ag. Sp. Alg. 1 . p. 120.— Syst. Alg, p. 273— Chalmers,
Algte Scot.
F u cu s phyllitis, var. subsessilis, Clem. p. 312.
F u c d s bico rn is, Cmel. Hist. Fuc. p . 192.
U lva plantaginifoUa, Wulf. ) _, . „
U lva plantaginea, m h , P *
T remella marina. Dill. Hist. Muse. p. 46. t. g. f. 4. ? .?
H ab. Shores of the Western Isles of Scotland, Mr Chalmers.
Plant tufted or aggregated. Root between scutate and fibrous. Stipes very
short, as fine as a bristle, immediately expanding into an oblong, somewhat
wedge-shaped frond, very obtuse at the extremity, which varies
in being rounded, or more or less truncate, or even emarginate; the
mairgira is entire, sometimes waved; the substance thin and membranaceous
; the colour olivaceous, like the other Laminarice. The fronds are
inconstant in their proportions: in general they are 3-5 inches in length,
and 1 to nearly 2 inches in breadth ; b u t specimens sometimes occur,
though rarely, of a nearly linear form.
For the acquisition to the British Flora of this very distinct
species of Laminaria, we are indebted to Mr C h a lm e r s ,