The English flora - SeaweedAfrica

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340 AI.GJE CONFERVOIDE.E. [Calithamnion.
less regularly pinnated with shorter joints ; but the two extremes may be
traced into each other. The favellcE of this species are involucrated,
pedicellated, and precisely resemble those of a Griffithsia; but the
habit and affinities are like Calithamnion.
5. C. Pluma, Ag. (feather?/ Calithamnion); filaments
creeping, stems erect subsimple naked below, the upper half
oppositely pinnate, pinna? erect appressed, articulations of the
stem 2—4 times longer than broad. Ag. Sp. Alg. v. 2. p. 162.
— Conferva Pluma, Dillw. Conf Syn. p. 72. t. F.
On the stems of Laminaria digitata, common ; first observed by the
late Miss Hutchins at Bantry.— Capsules similar to those of C Turneri.
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B. Hamuli alternate, pinnated or dichotomous.
a. Secondary branches pinnated or plumulate.
* Main-stems inarticulate.
6. C. Arbuscula, Lyngb. (shrubby Calithamnion); stems
naked below robust cartilaginous, main branches papillose with
short imbricato-plumulatebranchlets, ultimate pinnules divaricated
subsimple attenuate acute, capsules lining the inner faces of the
pinnules. Lyngb. Hydroph. Dan. t. 38. /. 1, 2, 3, (excl.
fig.
4, 5, 6.) Conferva Arbuscuki, R. Broun.—Dillw. Conf. t. 85.
(not t. G.)—E. Bot. t. 1916? Dasya Arbuscula and spongiosa,
Ag. Sp. Alg. v. 2. p. 121
Edin.p. 307.
Asperocaidon Arbusc, Grev. Fl. Crypt.
On rocks and stones, in the sea. Abundant on the west of Ireland
and Scotland. Very rare on the east of Scotland. Firth of Forth,
Messrs. Grevdle and Arnott.—Stems subsolitary, as thick as a small quill,
destitute of branches and densely pilose in the lower part: 4—8 inches
high. Lesser branches thickly clothed on all sides with minute imbricated
plumules. Colour a fine claret. Capsules spheerical, sessile, with a
broad limbus. Favellce roundish -ovate, or irregularly lobed, mostly in
pairs. The figure in E. Bot. is not very characteristic.
7. C. Brodicei, Harv. MSS. (Brodie s Calithamnion); stem
subopaque spuriously articulated slender, branches laxly set
with short elliptical quadrifarious plumules, ultimate pinnules
spreading obtuse subsimple, capsules roundish sessile on the
ramuli mostly solitary.— C. purpuraseens? Brodie MSS.
On Algae, at Forres, Mr. Brodie. Coast of Northumberland, Mr.
Robertson. Torquay, Mrs. Griffiths and Miss Cutler.— 1—3 inches high,
cartilaginous, thrice as thick as hog's bristle at the base, gradually atten-
uated, tufted ; branches quadrifarious. Plumides 1—2 lines long, elliptical,
rounded at the top, pinnae scarcely tapered, very obtuse, simple or
subramulose near the apex, erecto-patent. Colour pale brownish-red.
Main-stem inarticulated, longitudinally striated, branches subopaque with
obscure articulations, twice as long as broad, articulations of the ramuli
rather shorter. Capsxdes alternate or opposite, seated near the top of
the pinnules. Favellce sometimes produced on the same frond, or even
the same branch as the capsules. Such is Brodie's plant. Mrs
Griffiths sends us some beautiful individuals from Torquay, which, though