The English flora - SeaweedAfrica

254 ALG.E.
seeds, forming distinct sori or groupes (mostly arranged in longitudinal
lines). Grev.
Tribe VII. FuRCELLARiEiE. Marine plants, of a dull darkpurplish
or brownish-red colour, changing to black on exposure
to the air. Substance cartilaginous. Structure cellular, ivith a
dense colonized stratum of horizontalfilaments, forming ths cir-
cumference. Root creeping. Frond cylindrical, filiform, di-
chotomous. Fructification terminal, composed of pod-like inde-
hiscent receptacles, within which is imbedded, near the circumference,
a horizontal circular stratum of dark-brown oblong-pearshaped
seeds. Grev.
22. Furcellaria. Frond cartilaginous, cylindrical, filiform,
dichotomous. Fructification; terminal, elongated pod-like receptacles,
containing a stratum of dark, oblong-pear-shaped
seeds in the circumference. Grev.
Tribe VI 1 1. Spongiocarpe/e. Marine plants, of a dull dark
reddish-purple colour, changing to nearly black on exposure to
the air, of a cartilaginous substance and cellular structure.
Foot scutate. Frond filiform, cylindrical and dichotomous.
Fructification uniform, consisting of naked, spongy warts, composed
of a mass of radiating filaments, among ivhich are imbedded
numerous, roimdish clusters of seeds, surrounded with a
pellucid border ; the seeds wedge-shaped, fixed by their base to a
central point. Grev.
23. Polyides. Frond cartilaginous, filiform, cylindrical.
Fructification; naked, spongy warts, composed of radiating
filaments, among which are imbedded roundish clusters of wedgeshaped
seeds, surrounded with a pellucid border. Grev.
Tribe IX. Floride^:. Marine plants, ofa purplish-reddish or
fine rose colour, seldom changing much by exposure to the air ;
of a coriaceous, cartilaginous or membranaceous substance and
cellular texture, often reticulated. Frond fiat, compressed or
cylindrical, with or ivithout a midrib ; sometimesfurnished with
distinct leaves or foliaceous expansions. Fructification often of
two kinds ; the first, spherical or hemispherical capsules, sessile
or stalked and containing a round mass of seeds—the second composed
of granules, (^mostly ternate) scattered or collected into
little spots (sort) or lines, and situated either in the general sub-
stance of the frond, or in leaflets or distinct pod-like foliaceous
processes. More than one kind of fructification is never
found upon the same individucd. Grev.
24. Delesseria. Frond rose-red, flat, membranaceous,
cap-
with a percurrent midrib. Fructification of two kinds :
sules containing a globular mass of seeds, and ternate granules,
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