The English flora - SeaweedAfrica

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Fulysijj/ionia.] ALG/E C ONFERVOlDEiE. 331
Hutckinsia parasitica, Ag. Sp. Alg. v. 2. p. 103.—H. Mcestingii,
Lyngb. Hydroph. Dan. £.36.
On the larger Algae, and on rocks, rare. Coast of Yorkshire, Dorset
and Cornwall, Huds. Bantry, Miss Hutching. Firth of Forth, Dr.
Richardson.— 1 — 2 inches high, slender, of a fine red, cartilaginous and
scarcely adhering to paper. From every variety of Plilota plumosa,
(some states of which it much resembles,) this species may be known
by the alternate, not opposite pinnules, and more rigid texture. The
finest specimens I have gathered grew on the perpendicular faces of
rocks, at the extreme ebb of springtides : and Mr. Sconce finds it in a
similar locality at Plymouth-
f f
Rigid ; dark red or brown, stria numerous.
11. P.atro-j'ubescens, Grev. (dark red Polysipkonia); filaments
elongated sparingly branched rigid, ramuli short subfasciculate
or scattered subulate erect, lower articulations twice or thrice,
upper ones half as long as broad, capsules ovate pedunculate or
sessile. Conf. atro-rubescens, Dillw. Conf. t. 70.— C, nigra,
Dillw. Conf. Syn.p. 86. E. Bot. t. 2340. Hutckinsia atro-rubes-
cens, Ag. Sp. Alg. v. 2. p. 64.
On marine rocks, " far from uncommon on any of our shores,'.'
Dillw.— Confined principally to the southern parts of England. Stems
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tufted, often covering the rocks in large patches ; 2—
b' inches high,
thicker than horse-hair, more or less furnished with short, subulate,
erect ramuli ; veins numerous, spiral. Colour deep red, often becoming
blackish in drying, in which state it scarcely adheres to paper. Capsules
subglobose, with a very wide truncated aperture, inclosing a tuft of
pyriform seeds.
12. P. Agardhidna, Grev. (AgardJis Polysiphonia); filaments
elongated much branched rigid, ramuli subfasciculate divaricat-
ing attenuated at each cud. lower articulations twice or thrice
as Long, upper shorter than their diameter, " capsules <
" rotundato-convex quite >e->ile." Grev, Crypt. 11. t. 210.
Ag. Sp. Alg, V, l'. p. (i().
On marine rocks; Firth of Forth, Dr. Grevilie. Appin, CapUCar*
michael.—Dr. Grevilie has taken much pains to illustrate this species in
bis Crypt, Flora, and yet I am unable satisfactorily to distinguish it
from /'. atro-rubetcetU s though with tin- assistance of that author's own
specimens. The character of the fusiform ramuli, on which Dr. Grevilie
lays so much Btress, is Burelj variable, even in the same tuft; and,
ai I cannot acknowledge the roundish bodies he calls " capsules," to be a
true capsularfruit, 1 can place no dependence on an) distinctions drawn
from them.
1:;. P. bddtOj Grev. (deep-brown Polysiphonia); filaments
short subdichotomous rigia, branches elongate straight erect with
very acute axilla?, ramuli few icattered, articulations uniform
rather Longer than broad. Conferva badia, Dillw, <
^.,. . /. ( ,. r Huichintia badia, //< P. IL /
i i r, (Hi nor ///».'.