The English flora - SeaweedAfrica

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alg;e. 257
Fructification ; minute, aggregated capsules, surrounded by an
involucre. Grev.
Tribe X. Gastrocarpe.e. Plants all marine, with a scutate
root, of a pink, red, or purplish-red colour, most of them
not changing much on exposure to the atmosp/iere, of a
carnose, gelatino-cartilaginous or gelatino-membranaceous sub-
stance ; the structure consisting of a cellular external coat
or membrane, and a pellucid, gelatinous, internal mass, mostly
traversed by colourless jointed filaments arising from the outer
membrane. Frond cylindrical, compressed or flat, continuous,
destitute of midrib or veins. Fructification; roundish clusters
or globules of red seeds, imbedded in the internal gelatinous sub-
stance of the frond, and often unaccompanied by an external
pore. Grev,
42. Irid.ea. Frond flat, expanded, carnose or gelatino-
cartilaginous, more or less of a purplish-red colour. Fructifica-
tion ; globules of roundish seeds, imbedded between the two coats
of the frond. Grev
43. Halymenia. Frond nearly flat or cylindrical, gelatinomembranaceous,
of a pinky-red colour, more or less dichotomous,
the segments often laciniated. Fructification; punctiform
globules of seeds, imbedded in the central substance of the
frond. Grev.
44. Dumontia. Frond cylindrical, simple or branched,
membranaceous, tubular, gelatinous within, of a red or purplered
colour. Fructification ; globules of seeds, attached to the
inner surface of the membrane of the frond. Grev.
45. Catenella. Frond filiform, somewhat compressed,
creeping, throwing np numerous branches, contracted, as if
jointed, in a moiiiliforin manner, composed internally of branched
filaments radiating from the centre. Fructification unknown.
(in r.
Tiube XI. Ulvaceje. Plants J]>,ntd in the sea, infresh-water
or on damp ground) fyc, of an herbaceous gran orfine purple
colour, (fa thin fender membranaceous substance and reticulated
structure, rarefy gelatinous, Frond with a very minutely scu-
ta t< root, expanded, or tubular and continuous. Fructification;
roundish and mostJij r/uatcrua/c r/ranules or minute sporular
grams, imbedded i„ tin dlicate membrane (if the frond. (,',, r.
46. PoRpnrfiu. Frond plane, oneeediagly thin ami of a
purple colour. Fructification; 1. Mattered tori of orsl seeds t
— l\ roundish granule*, mostly arranged in a quaternate manner,
ami Covering the whole frond. (,'rn .
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