The English flora - SeaweedAfrica

Polysiphonia.] ALGJE CONFERVOIDEiE. 327
our plant they are abundant, and form one of its most striking charac-
teristics.
8. E. Mertensii, Ag. (Mertens' Ectocarpus); distichous, filaments
bipinnate, pinna? and pinnulse opposite unequal. Ag.
Sp. Alg. V. 2. p. 47.— Conferva Mertensii, E. Bot. t. 999.
Sea-shore, very rare. Yarmouth, Mr. Wigg. Bantry Bay, Miss
Hutching. Coast of Durham, Mr. IV. Backhouse.— Filaments 1 — 2
inches high, tufted, much branched, pale yellowish-olive, regularly bipinnated,
the pinnulae very slender, scarcely one-fourth the diameter of
the branch. The only fruit which 1 have observed, consists in granules,
imbedded in the swollen pinnulae.
9. E. brachidtus, (brachiate Ectocarpus); " light brown very
much branched slender wavy entangled, the branches opposite,
crossing each other widely spreading with taper points, joints
cylindrical twice as long as broad." Sm.—E. cruciatus, Ag.
Sp. Alg. v. 2. p. 44.— Conferva brachiata, E. Bot. t. 2571.
In salt-marshes at Cley, Norfolk, Messrs. Turner and Il»»ker.—l am
obliged to give the specific character of this plant (if it be indeed a distinct
species) from E. Bot., having no access to authentic specimens.
Agarilh has unaccountably altered the name to cruciatus, and conferred
that of brachiatus on our E. sphecrophorus.
Tribe XV. CERAMiEiE.
Plants red or purple, rarehj brown. Fructification double, dicecious
;— 1 . external capsules ; 2. polymorphous receptacles or
granules in swollen rainuli.
59. Polysiphoxia. Grev. Polysiphonia.
Filaments partially or generally articulate, longitudinally striated
with internal parallel tubes. Fruit double.—-1. ovate
capsules famished with a terminal pore; 2. granules immersed
in distorted rainuli.—Name : err///,;, many, ciZo., a tube.
A. Main filaments inarticulate.
1. i\ fruticuldsa, Grev. ( Shrubby Polysiphonia); root creep-
ing, filaments rigid inarticulate bushy, upper branches bi-tripin-
nate, lower ramuli sqnarrose, articulations of the rainuli ball as
long a- broad, Feins anastomosing.— Fucus frutsc^ulosus, W "If-—
Turn. Hist Fuc.t.227. E.BoLl [Q&Q^—Hutehmsia Wulfam,
Aq. Sp. . I/;/, r. 2. />. !'*>.
On sand-covered rocks; extreme southern coast England.
Bantry Bay, common, Miss Hutdms, Appin," Captain CarmckaeL
Miltown Malbay, Ireland, abundantly, W. //• Harvey.—Mr. Arnott
bas i ommunicated a verj beautiful plant from Whitsand Bej which, for
.
the pro. nt, I consider a rarietj ofthia species, though not without
doubt that it ma\ Ian -after prove distinct The Hune plant was found
y
by Miss Hutchina at Bantry. The fronds are flat, l— lines in breadth,
iparinai] and irregularl) branched. Branches erect, with acute axill
with short alternate distichous ramuli, 1— Lines in length | the smaller
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