The English flora - SeaweedAfrica

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332 ALG.E CONFER VOI DE/E. [Polysiphonia-
On marine rocks, near low-water mark, not uncommon.— Closely allied
to P. atro-rubescens, of which I more than suspect it to be a variety
or merely the young state. Fruit unknown.
14. P. denuddta, Grev. (naked Polysiphonid); filaments long
rigid sparingly branched, branches distant naked with very patent
axillae, articulations uniform once and a half as long as broad.
— Conferva denudata, Dillw. Syn. Conf. p. 85.*. G—Hutchinsia
denudata, Ay. Sp. Alg. v. 2. p. 73.
At Southampton, Miss Biddulph.— This, I have no doubt, is only a
battered state of the last. The filaments are 4—6 inches long, with a
few straggling branches.
15. F.violdcea, Grev. (purple Polysiphonia); filaments flaccid
much and fasciculately branched upwards, branches subdichotomous
patent, ramuli scattered elongate subsimple, middle articulations
3—4 times upper twice as long as broad, capsules
shortly pedicellate subovate. Hutchinsia violacea, Ay. Sp. Alg.
v. 2. p. 76.—Lyngb. Hydroph. Dan. t. 356. (excl.fig. a.)
On marine rocks, &c, probably common. Appin, Capt. Carmiehael.
Elberry Cove, Devon, Mrs. Griffiths.—3—4 inches high, sparingly
branched at the base, much and somewhat fasciculately branched upwards,
branches long, patent, subdichotomous, the secondary ones very erect,
almost appres-ed, with roundish axillae, ramuli elongated, virgate, straight,
simple, or with a few ramular processes near the apex, often fibrillose.
Articulations 5— 7-striate, the basal ones very shortcut rapidly elongating.
Colour a dull red ; substance flaccid and adhering to paper. Capsules
shortly pedicellate, ovate or suburceolate, with an elongated but not
contracted neck, scattered over the ramuli.
] 6. P. nigrescens, Grev. (dark Polysiphonid) ; filaments robust
rigid below, much branched and bushy, ramuli crowded erect
alternate subulate the uppermost fasciculate, lower articulations
very short, upper rather longer than broad, capsules ovate sessile.
Conferva fucoides, Dillw. Conf. t. 75. E. Bot. t. 1743.— C. nigrescens,
Dillw. Syn. Conf. p. 81, and E. Bot. t. 1717—Hutchinsia
nigrescens, Ag. Sp. Alg. v. 2. p. 69.
On marine rocks, &c, common. A variable species ; but easily distinguished
by its bushy habit and luoody stems, rough with broken
branches. The only difference I can find between the Conf. fucoides
and nigrescens of authors, lies in the habit; the one having more erect
branches than the other ; but this surely is of no importance in such
variable plants.
17. P.furcelldta (forked Polysiphonid) ; filaments elongated
tufted entangled flexuose repeatedly and closely dichotomous,
axils broad rounded, ramuli erect, apices forcipate, middle
articulations 3—5 times longer than broad.
—
Hutchinsia furcel-
lata, Ag. Sp. Alg. v. 2. p. 91.
Floating in the sea, at Sidmouth, Mrs. Griffiths and Miss Cutler.—
Filaments slender, 5— G inches long, much entangled, and excessively
branched, flexuose, the divisions dichotomous, very close toward the
extremities. Articulations polystriate ; striae slender, sometimes cross-