The English flora - SeaweedAfrica

328 ALG^ CONFERVOIDEiE. [Folysiphonia.
ones simple, the larger, again, pinnatifid; pinnulse broadly subulate,
subacute.—The only fruit hitherto found on this variety consists in ternate
granules, imbedded in the uppermost pinnulae.
2. P. Carmichadidna, Harv. MSS. (CarmichaeVs Polysiphonia);
filaments tufted rigid branched from the base, branches
alternate inarticulate divaricating, ramuli subdichotomous very
patent, their articulations as long as broad.—P. divaricata,
Carm. MSS. (not of Ag.)
On Dcsmarcstia acideata, at Appin, Captain Carmichael.— Filaments
tufted, 4 inches high, rigid, thicker than hog's bristles, branches scattered,
issuing at right angles, ramuli sparingly divided, patent and divaricating.
Stem and principal branches longitudinally striated, inarticulate, or
towards the apex having an obscure appearance ofjoints; articulations of
the ramuli 2—4-striate, somewhat swollen at the joints. Colour " reddish-brown,"
changing to black in drying. Fruit unknown. In drying
it adheres very imperfectly to paper.— A most distinct, and I think undescribed,
species, of which I have only seen the single specimen found
by Captain Carmichael.
3. p. Brodicsi, Grev. (Brodie's Polysiphonia) ; filaments
continuous cartilaginous, branches alternately pinnated with
spreading fasciculato-multifid flaccid ramuli, articulations of the
ramuli rather longer than broad.— Conferva Brodiaii, Dilliv.—
Hutchinsia Brodicsi, Ag. Sp. Alg. v. 2. p. 63
E. Bot. t. 2589.
— —
—
/3. sub-simplex. Hutch. penicellata, Ag. Sp.Alg. p.65—H.Brodicei,
Lyngb. Hydroph. Dan. t. 33.
On marine rocks and the larger Algce. Discovered by James Brodie
of Brodie, Esq., near Forres. Abundant on various coasts of Scotland
and the west and south of England. Very common on the west of
Ireland.— One of the most beautiful of the genus, and easily recognised
by its broadly fasciculate ramuli, and inarticulate stems. The substance
is extremely flaccid and decomposes almost immediately in fresh water.
Fruit of 2 kinds: 1. Capsules ovate, becoming contracted in the upper
part into a short obtuse neck, reticulated, subsessile, including
sphaerical seeds.— 2. granides imbedded in distorted ramuli.— /3, which
we have from Captain Carmichael, who gathered his specimens at Staffa,
differs from the usual state of the plant in being less branched, more
rigid, of a darker colour and with more dense ramuli.
4. P. Lynghyei, Harv. (Lyngbyes Polysiphonia); main filaments
thick cartilaginous inarticulate, ramuli elongate irregularly
dichotomous very slender, crowded round the apices of the
branches in broad fascicles, axillae acute, articulations 2—4 times
longer than broad. Hutchinsia Lyngbyei, Ag. Sp. v. 2. p. 85.
H. strictoides, Lyngb. Hydroph. Dan. p. 114. t. 35, (bad.)
Shores of Bute, on the larger Algae, Dr. Greville.—6—10 inches high :
main filaments as thick as those of P. elongata, cartilaginous, inarticulate,
marked with short flexuose veins, not unlike the lireUce of an Opegrapha,
but wholly destitute of the appearance of dissepiments. Branches irregular,
patent, sparingly divided, their lower part almost bare, the upper
densely clothed with long, very slender, broadly fasciculate, crimson
ramuli ; ramuli much branched, straight, irregularly dichotomous,
not in the least attenuated at the base ; the axillae very acute ; articu-