r í
'r:
f!«
! '(
■
' i"
■ ” i:
- - i
! ' *■
I
h'" u
i ;• t
beneath. As 1 could never find it actually growing, it is probably an
inhabitant of deep water, and to that cause may be in part attributed
its very peculiar appearance.
The excellent Lamouroux committed a singular error in placing this
species in that section of the genus Fucus, which contains plants with a
channelled frond destitute of vesicles; yet, at the same time, he refers
to Turner’s very faithful representation.
6. F u cu s CANALICULATUS.
Frond flat channelled dichotomous linear without a midrib and
without vesicles, receptacles terminal oblong.
Fucus canaliculatus, L in n . S y s t. N a t . v . 2. p . 716. Sm . E n g . B o t. t. 823. T u r n . S y n .
F u c . p . 242. H is t. F u c . t . 3. L am o u r . E s s a i, p . 20. L y n g b . H y d r o p h . D a n . p . 6 . 1 . 1.
Ag . S p . A lg . V. 1. p 96. S y s t A lg . p . 279. G r e v . F I. E d in . p . 284. S p r e n g . S p . P I . v . 4 .
p . 316.
H a b . Rocks on the sea-shore. Perennial. Summer and autumn.
Common on most parts of the British coast.
Root a conical disk. Fronds tufted, numerous, two to six inches
long; several times dichotomous, one to three lines wide, distinctly
channelled. Receptacles oblong, obtuse, simple or bifid, compressed,
wider than the frond, half an inch to an inch in length.
Substance tough and pliable. Colour olivaceous green, the receptacles
yellow when ripe. In drying it does not adhere to paper, and
becomes blackish.
One of those species which are satisfied with only periodical immersion.
It grows upon the rocks and large stones within the reach of
the flow of every tide.
* * * Frond cylindrical. Receptacles terminal.
7. F u cu s t u b e r c u l a t u s .
Frond filiform erect dichotomous without vesicles, receptacles terminal
cylindraceous.
Fucus tuberculatus, H u d s . F J . A n g l. p . 588. T u r n . S y n . F u c . p . 305. H i s t . F u c . t . 7*
S r a . E n g . B o t. t , 7 2 6 . L am o u r . E s s a i, p . 20. S t a c k h . N e r . B r i t . t . 9. A g . S p . A lg .
V. 1. p . 98. S y s t. A lg . p . 279. S p r e n g . S p . P I . v . 4. p . 316.
Fucus bifurcatus. W i th . B o t. A r r . ed . 6 . v . 4. p . 131. t. 17» f. L
H a b . In the sea. Perennial. Summer and autumn. Near St Ives,
Hudson. Near Acton Castle, in pools left by the tide, Stackhouse.
King’s Cove and St Michael’s Mount, Cornwall, Turner. Lizard
Point, Mr E. Forster junior. Ilfracombe, Goodenough. Bill of Portland,
below low water mark, Mr Bryer. North of Ireland, Dr Scott.
Root a small disk accompanied with a few creeping processes.
Fronds six to twelve inches high, as thick as a small goose-quill,
nearly simple towards the base, repeatedly dichotomous in the upper
part, the axils obtuse. Receptacles solitary, nearly twice as thick as
the frond, half an inch to an inch or more in length, cylindraceous,
obtuse.
Substance coriaceous, shrinking very much iu drying, and becoming
black, rigid and very brittle, without adhering to paper. -Colour olivaceous
green.
There is something peculiar in the habit of this plant, and the root
differs in some degree from that of the other F u c o i d e æ . It may ultimately
form a distinct genus Though said to grow abundantly in
several places, it must be considered as generally of exceedingly rare
occurrence on the British coast- The finest specimens I have seen,
were communicated by M. Chauvin from the coast of Normandy.
G e n u s V. HIMANTHALIA, Lyngh. Tab. III.
G e n . C h a r . Frond coriaceous, orbicular, peziziform. Vesicles
none. Receptacles elongated, strap-shaped, compressed,
dicbotomously divided, springing from the centre of the
frond, containing immersed tubercles furnished with a
pore.
A genus removed from Fucus by Lyngbye; and it must be confessed,
the habit is so different and peculiar, that we cannot wonder
at its separation. Lyngbye, however, does not seem to have formed
his genus upon the best grounds. For he considers the peziziform base
as a part of the root, and the remainder as the frond. In this he is
surely in error, though supported by the authority of my friend
Agardh. The peziziform expansion, I am led by my investigations to
regard, along with Wahlenberg, as the true frond in the strict sense,
and the elongated part as a true receptacle. The part which I name
the frond, attains nearly its full size before it begins to develope the
receptacle, which is exclusively occupied with the tubercles.* La-
* Since the above was written, I have received the Botanical part of
Duperrey’s Voyage round the World, in which I find that an able naturalist,
B 2