The English flora - SeaweedAfrica

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Gigartina.) ALGiE INARTICULATE. 299
simple granules, imbedded in the fronds of distinct plants.
Grev. Alg. Brit. p. \2\.t. 14 and p. 146. t. 16.—Name; from
yiyx^rov, a grape- stone, which the seeds somewhat resemble as seen
through the capsule.— At the suggestion of Mrs. Griffiths and
Mr. Harvey, and with the approbation of Dr. Greville, I
gladly unite Gracilaria of the latter with Gigartina. The former
of these Botanists having discovered the second or granular
mode of fructification upon Gigartina acicularis, it may be presumed
to exist, though as yet unnoticed, in other Gigartina ;
and in G. Griffithsice and G. plicata no regular fructification
has been detected.
1. G. purpurdscens, Lamour. (purplish Gigartina); frond
cylindrical filiform much and irregularly branched, ramuli setaceous
scattered bearing spherical tubercles immersed in their
substance.— Gracilaria purpur., Grev. Alg. Brit. p. 122.
Sp/iccrococcus purpur., Ag. Sp. Alg. v. I. p. 318 Fuc us purpur.,
Htuls.— Turn. Syn. Fuc. p. 357, Hist. Fuc. t. 9. E. Bot.
t. 1243.
F. tuberculatus, Light/.
On submarine rocks and Algae, frequent. 0. Summer.—Varying in
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size, from 6 — 8 inches to more than a foot, and also in the branches
which sometimes terminate in a kind of tendrils, twisting round other
Algae. The frond is somewhat gelatinous so as generally to adhere to
paper when dry, the colour is somewhat pellucid purplish-red, often
greenish in decay : but the best character is to be found in the immersed
capsules, causing a swollen appearance all round the ramuli which produce
them.
2. G. confervoides, Lamour. (Conferva -like Gigartina); frond
cartilaginous cylindrical filiform irregularly branched, branches
elongated bearing numerous slender ramuli attenuated at each
end, capsules external roundish scattered.— Gracilaria conferv.,
Grev.
v. 1.
Alg. Brit. p. 123. Splicerococcus conferv., Ag. Sp. Alg.
p. 303. Fucus confervoides, Linn.— Turn. Syn. Fuc.
p. 328, Hist. Fuc. t. %±.—E. Bot. t. 1668.—F. verrucosus, Huds.
— 8. procerrima ; branches very long generally simple and
almost naked. Turn.—F. longissimus, Stachh.— y. aJbida ;
frond compressed mostly diehotomous. ramuli subulate. Turn.
— F. aUndus, IIikU.— 5. genicidata ; frond distorted and bent
as if broken at the tubercles. Turn.
Rocky sea-shores, not (infrequent, especially in the south. Rare in
Scotland. Firth of Tav, Rev, J. Macvicar, Appin, Captain Carniic/iael,
and at Miltown Malbay, Ireland, Mr. Harvey.— More cartilaginous
than the preceding, and generally more Blender, and abundantly distinguished
by the different mode of fructification.
3. G. compr&sa, (compressed Gigartina); frond cartilaginous
brittle between cylindrical ami compressed diehotomous,
branches subdistichous spreading las gradually attenuated to a
subulate point, capsules hemispherical Gracilaria n»njw*lsii,
Gtev. \i. I -jo Spharococcus compressuS) Ag. tip, Ma.
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