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P l a t e CXCII.
LAMINARIA PHYLLITIS, Lamour.
G en . Ch a e . Frond stipitate, coriaceous, or membranaceous, flat, undivided,
or irregularly cleft, ribless. Fructification-, cloudy spots of spores,
imbedded in the thickened substance of some part of the frond.
L am in a e ia (Lamour.),—from lamina, a tliin plate, in allusion to the
flat frond.
L am in a e ia phyllitis-, stipe short, subcompressed, gradually expanding
into a linear-lanceolate, delicately membranaceous, undivided frond.
L am in a e ia pliyllitis, Lam. Ess. p. 32. lyngb. Hyd. Dan. p. 33. Ag. Sp.
Alg. vol. i. p. 121. Ag. Syst. p. 273. Spreng. Syst. Veg. vol. iv. p. 325.
Qrev. Alg. Brit. p. 34. Hook. Br. El. vol. ii. p. 272. Harv. in Mack. El.
Hib. p a rt 3. p. 171. Endl. 3rd Suppl. p. 37. Kiitz. Fhyc. Gen. p. 345.
L am in a e ia saccharina {young state). Hook. Fl. Scot. part 3. p. 98.
L am inaeia saccharina, var. attenuata, Grev. Fl. Edin. p. 283.
Fucus pliyllitis, Stack. Ner. Brit. t. 9. Turn. Syn. p. 193. Turn. Hist. 1 .164.
E. Bot. 1 .1331. Esper, Ic. 1 .149.
Fu cus pliyllitidis folio, Baii. Syn. p. 40.
H a b . On rocks and stones, in pools left by the tide; also in four or five
fathoms water. Biennial? Summer. Not uncommon. Coast of
Dorsetshire, Fulteney. Portland Head and Tenby, StacJchouse. Sidmouth
and Torquay, Mrs. Qrififitlis. Yarmoutli, M r. Wigg. Coast of
Sussex, M r. Borrer. Orkney, Bev. J . H . Pollexfen and B r . Me’B ain .
Frith of Forth and Staffa, B r . Greville. Ardrossan, Bev. B . Lands-
borough. Larne, M r. Templeton. Bantry Bay, Miss Hutchins.
Howth and Balbriggan, Miss Gower. Kingstown, M r. T. H. Cole.
Geoge. D is t e . Atlantic shores of Europe, from Norway to France.
D e so e . Boot consisting of thick, branching, and clasping fibres. Stem, an inch
or two in length, slender, cylindrical below, becoming compressed upwards,
and gradually widening into the much attenuated base of a linear lanceolate
frond. Frond from six or eight inches “ to three or more feet iu length,
and one to six inches in width,” {Grev.) delicately membranaceous, flat, or
slightly waved at the margin, undivided, tapering much, and gradually to
each extremity. Fructijication, I have not seen. Substance thin, but
tough, glossy, and more or less perfectly adhering to paper. The frond is
traversed internally by a double stratum of large air-ccUs, whose walls, as
well as the surfaces of the frond, are composed of minute cellules. Colour,
when quite fresh, a clear, brown-olive, soon changing in fresh water to
green, which is also the colour of dried specimens.
This plant has been observed by botanists from a very early
period, and almost invariably kept distinct from L. saccharina,
■’IS