Ml e tlifh .. H.B . & H-imp.
Ser. Me lanospermeæ. Pam. Cocoocarpeoe.
P late CCLXVI.
GIGARTINA TEEDII, Lamour.
G e n . C h a r . Frond cartilaginous, either filiform compressed or flat, irregularly
divided, purplish-red; the axis or central substance composed
of brandling anastomosing longitudinal fibres ; the periphery
of dichotomous filaments, laxly set in pellucid jelly; their apices
moniliform, strongly united together. Fructification double, on distinct
plants ; 1, external tubercles, containing, on a central placenta,
dense clusters of spores, scattered among the filaments of the periphery.
G i g a r t i n a [Lamour),—from ytyaprov, a grape stone, which
the tubercles resemble.
G ig a et in a Teedii; frond cartilagineo-membranaceous, flaccid, flat, linear,
acuminate, repeatedly pinnate ; the pinnæ opposite or alternate, hori!
zontally patent^ distichous^ set with horizontal^ spine-like ramuli •
coccidia globose, on the ramuli, sessile.
G ig a e t in a Teedii, Lamour. M s. p. 49. t. 4. f. 11. Sook. Br. FI. vol. ii. p. 301
Wyatt, Alg. Damn. no. 37. Earv. Man. ed. 1. p. 76. Fndl. Zrd Suppl. p. 43."
C h o n d e a c a n t h u s Teedii, Kütz. Fhyc. p. 3 9 9 .
E h o d o m e n ia Teedii, Grev. Alg. Brit. p. 9 6 .
SïHÆEOCOCCüs Teedii, Ag. Sp. Alg. vol. i. p. 377. Ag. Syst. Ala. p 235
Grev. Crypt. FI. t, 356.
Fuous Teedii, ItotJi, Cat. Bot. vol. iii. p. 108. t. 4. Turn. E û t. Fuc, t. 308.
H ab. On rocks, at the extreme limit of low water. Perennial. Very rare
Elberry Cove, Torbay, Mrs. Griffiths (1811).
G e o g e . D i s t e . Atlantic coasts of France, Spain, and Portugal. Abundant in
the Mediterranean.
D e s c e . Boot a flattened disc. Fronds numerous from the same base, densely
tufted, from three to six inches long, distichous, excessively branched in à
more or less regularly pinnate manner, all the divisions horizontally patent.
Ih e mam stems are from one to two, or, in very luxuriant specimens, three
or four lines in breadth in the middle, and taper towards both ends, being
attenuated upwards into a long slender point. They are either simple or
forked, or irregularly cloven, flexuous, and closely beset with lateral branches
which are simply, doubly, or trebly pinnate, and always beset with short
spine-hke, horizontally patent ramuli. Different specimens vary much in the
amount of branching, and in the breadth of the frond. Fructification has
not been found in this country. The favellidia are enclosed in tubercles as
large as poppy seed, plentifully scattered over the sides of the ramuli and
partiaUy immersed in them. Colour, when quite recent, a dull brownish
red ; but in fresh water and in decay the frond assumes various tints of
red and yellow, and finally becomes verdigris green. Substance between
cartilaginous and membranaceous, soft and flexible, becoming rather hornv
when dry. In drying the frond shrinks considerably, and scarcely adhere«
to paper.