. ,1I
f
Webkii (F.) et Momi (D. M. H.) Beitrüge zur Naturkunde, 1 Th.
Kiel, 1801. 2 Th. 1810. 8vo.
Archiv für die systematische Naturgeschichte. 1 Heft. Leips.
1804. 8vo.
— Naturhistorische Reise durch einen Theil. Schwedens. Goettingen,
1804. 8vo.
W e ig e l (C.) Observationes Botanica;. Gryphioe, 1772. 4to.
W e is (F. G.) Plantæ Cryptogamicæ Floræ Goettingensis. Goettingoe,
1770. 8vo.
W ig g er s (F. H.) Primitiæ Floræ Holsatiæ. Klloniæ, 1780. 8vo.
W it h e r in g (W.) An Arrangement of British Plants, according to
the latest improvements of the Linnæau System. Sixth edition,
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W oodward (T. J.) The History and Description of a new species of
Fucus (F. subfuscus). Linn. Trans, v. 1. p. 131.
Description of two new British Fuci (F. asparagoides et Hypoglossum).
Ibid. V. 2. p. 29. et p. 321.
Description of Fucus dasyphyllus. Ibid. v. 2. p. 239.
Observations upon the generic character of Ulva, with descriptions
of some new species. Ibid. v. 3. p. 46, et in Schrad. Journ.
1 St. p. 128. .
W r a n g e l (F. a .) Memoire pour servir a I’histoire botanique du
Byssus flos-aquæ L. Kongl. Vetenskaps Acad. Handl. 1826, 1.
p. 96.
Microscopiska och Physiologiska undersiikningar roranda utrecklingen
af Lepraria kermesina och dess likhet med den sa kallade
rôda snön. Tillägg till Anmärkningarne rörande Byssus Jolithus L.
Ibid. 1823, p. 71.
W u l f e n (X.) Cryptogamia aquatica. Lips. 1803, 4to. et in Römers,
Archiv fiir die Botanik, 3 B. p: 1.
Plantæ rariores Carinthiacæ. Jacq. Collect, v. 1. p. 351 v. 3.
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disserit.).
Z oega (J.) Flora Islándica (juxta plantas in Islandia a Joh. Gerh.
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D E S C H l P i ION
OF
BR IT I SH ALGÆ.
O r d e r L— FU CO ID EÆ .
Plants ail marine, o f an olive-brown or olive-green colour, becoming
black on exposure to the air ; o f a firm coriaceous or
ligneous substance, and fibrous texture, tearing with facility in
a longitudinal direction. Frond with a hard scutate root, f u r nished
in many species with distinct leaves. Vesicles or air-
vessels generally present, and are either uniform dilatations o f
particular parts, or distinct bodies supported cm little stalks.
Fructification, tubercles contained in distinct receptacles, or
imbedded in the frond, and containing dark-coloured seeds
surrounded with a pellucid limbus, which escape by a terminal
pore.
G e n u s I. SARGASSUM, Rumph., Ag. Tab. I.
G e n . C h a r . Frond leaved. Leaves stalked, with a mid-rib.
Air-vessels simple, axillary, stalked. Receptacles small,
linear, tuherculated, (mostly in axillary clusters or racemes).
Seeds in distinct cells.
A very extensive genus, separated by Agardh from the genus Fucus,
under which it was included even by Lamouroux. It is a very natu-
A