r / . d r u :
P l a t e L V .
LAURENCIA PINNATIFIDA, Lamour.
Gen. Chak. Frond cylindi’ioal, or compressed, linear, pinnatedly branched,
tlie apices obtuse; structure cellular, solid. Fructification of two
kinds, on distinct individuals; 1, ovate capsules [ceramidia) furnished
with a terminal pore, oontainmg a tuft of pear-shaped spores; 2, tri-
parted tetraspores imbedded in the ramuli. Latjbenoia [Lamour.),—
in honour of M. de la Laurencie, a French naturalist.
tifida; frond compressed or subcylindrical, cartilaginous,
bi-tripinnatifld, the divisions alternate; the ultimate ones linear,
erecto-patent, simple or lobed.
L a u r e n c ia pinnatiflda, Lamour. Ess. p. 43. Grev. Alg. Brit. p. 108. t. xiv.
Hook. Br. El. vol, ii, p. 396. Harv. hiMack. El. Hib. part 3. p. 198. Wyatt,
Alg. Banm. no. 113. ILarv. Man. p. 69. Mont. PI. Canar. p. 154. Hook.
Jil. et Harv. Alg. Nov. Zeal. no. 65. Hook. fil. El. Ant. pari. i. p. 184.
J. Ag. Alg. Medit. p, 114. Mont. Voy. Pole Sud. Bot. p. 126. Endl. 3rd
Suppl. p. 43,
C h o n d r ia pinnatifida, Ag. Sp. Alg. vol. i. p.337. Syst. p. 301. Hook. El.
Scot. part. 3. p. 105. Gi'ev. El. Edin. p. 391. KiiU. Phyc. Gen. p. 437.
G e l id iu m p in n a tifid um , Lyngb. Ban. p . 4 0 . t. 9.
Fuous pinnatifidus, Gm. Linn. Syst. Nat. p. 1385.
Huds. M. Ang. p. 581.
Lightf. El. Scot. p. 953. Stack. Ner. Brit. p.
48. t. 11. Turn. Syn.
vol. 3. p. 267. Hist. t. 20. E. Bot. t. 1202.
F u cu s multifidus, Huds. El. Ang. p. 581.
Var. f t Osmunda; frond flat, generaUy undivided; ramuli short,
and
multifid.
Fuous pinnatifidus, /3. Osmunda, Turn. Syst. I. c. Hist. t. 20.
F u cu s Osmunda, Gm. Linn. Syst. p. 1385. Chn. Hist. Fuc. p. 155. t. 16.
f. 2. Stack. Ner. Brit. p. 46. 1 .11.
F u cu s filicinus, LAghtf. El. Scot. p. 954. [Excl. Syn. Huds.).
Var. y, angusta; frond roundish; ramuli cyhndrioal, elongated, very erect,
slightly thickened upwards.
Fuous pinnatifidus, y, angustus. Turn. I. c.
Var. 8, tenuissima; frond flat, of smaU size; ramuli very slender and much
branched, the branches divaricated.
F u ous pinnatifidus, 8, tenuissimus. Turn. I. c.
Var. (, littoralis; dwarf, greenish ohve; frond flat, broad, tapering to the
base; ramuli short, emaiginate, bearing cup-like bodies filled with
“ antlieridia.” (?)
H ab. On submarine rocks from the extreme of high water mark, to beyond
the limit ot low water. Abundant on the British coasts.
G e o g r . D i s t r . On the shores of the Atlantic, Pacific, Indian and Southern
Oceans, abundantly. Mediterranean Sea. Fed Sea.
D e s c b . Boot a disc, accompanied by fibres. Eronds tufted, 1 -12 inclies high
or more, from half a line to two or tlmee lines in width, flattish, compressed
or subcylindi'ical; the main stem undivided, or parted nto two or three
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