The English flora - SeaweedAfrica

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Receptacles cylindrical, more or less lanceolate, tnbercnlated,
terminal. Seeds in distinct cells. Grev,
3. Halidrys. Frond compressed, coriaceous, linear, pinnated
with distichous branches. Air-vessels lanceolate, stalked,
divided by transverse septa. Receptacles lanceolate, stalked,
compressed. Seeds in distinct cells. Grev.
4. Fucus. Frond plane, compressed or cylindrical, linear,
dichotomous, coriaceous. Air-vessels, when present, innate in
the frond, simple, large. Receptacles terminal (except in F.
nodosus), turgid, containing tubercles imbedded in mucus, and
discharging their seeds by conspicuous pores. Grev.
5. HlMANTHALlA. Frond coriaceous, orbicular, peziziform.
Vesicles none. Receptacles elongated, strap-shaped, compressed,
dichotomously divided, springing from the centre of the frond,
containing immersed tubercles, furnished with a pore. Grev.
Tribe II. Lichixe^. Marine plants, of a blachish-green colour
changing to deep blach on exposure to the air, of a cartilaginous
substance andfibrous texture. Frondflat or cylindrical,
minute, branched in a dichotomons or subpalmated manner.
Fructification terminal or nearly terminal, composed of capsules
furnished, with a pore and fiMed with a colourless gelatinous
mass of veryfine filaments, among which pellucid oral or oblong
seeds are disposed in many radiating moniliform str'ns. Grev.
(i. Lichina. Frond cartilaginous, blackish- green, dichoto-
mous. Fructification ; roundish capsules of the same colour as
the frond, containing radiating moniliform lines of pellucid seeds,
imbedded in a gelatinous mas> of filaments. Grev,
Tribe III. Laminabie-e. Marine plants, of an olive-brown
or olive-green colour, becoming somewhat darker on exposure to
tin mi\ varying in texture from coriaceous to membranaceous.
Frond with < fur cases furnished
with (oie er mmc ribs. Vesicles we, {except in the
cgenus Macrocystus,) unless the hollow stem oft
In e, nsid n d as such, Fructification, so for os is hitherto known,
either seeds mixed with " moss of vertical, jointedfilaments, o>
roundish granules, without filaments, forming, in both easts.
dense, spreading spots or tori, on tin suh part of
the frond, Structun denselyfibroso-ceUular, without any ap-
pearance of reticulation. Grev,
7. A i. \ i:i.\. Frond membranaceous, furnished with m per«
current, cartilaginous midrib; the st< m pinnated with distinct
leaflets. Fru tifi* pj iii«»i m d in
the ii' i