CRYPTQGAMIA. ALGiE. Fucus. 
81 
( Turn. Hist. 90. E.)— Stackh. 1 —Velley 1— {E. Bot. 1221. E.)— H. Ox. xv. 
9. 1— -Bast. ii. 11. 3. 
Two feet high or more, but it varies much in size. Substance hard, lea¬ 
thery. Colour green to yellowish, or olive, blackish when dried, but 
still in some measure pellucid. Stem flat, pervading the whole length of 
the leaves, which are oblong, flat, edges set with teeth of various sizes. 
It has no air vesicles, but little pencils are often found on both surfaces, 
and tubercles bearing seeds, filled with woolly matter, in the substance of 
the leaf, either scattered, or more collected at the extremities. Gmelin 
Fuc. 57. When in fruit, the extremities are pale yellow, and the tubercles 
brown. Mr. Stackhouse. This Fucus has two kinds of fructification suf¬ 
ficiently obvious by the aid of a common eye-glass. As far as the mid¬ 
rib pervades the leaves you may see globular granulations scattered 
within the substance of the plant sending out pencils of threads upon the 
surface. Where the mid-rib ends, towards the termination of the leaves, 
the surface is set thick with tubercles, each tubercle the section of a 
sphere, with an opening at the top through which issues a mucilagi¬ 
nous fluid containing oblong substances, probably the seeds; but so 
small as to require a high magnifier to be distinctly seen. 
(Serrated Fucus. E.) Rocks and stones in the sea. P. Jan.—Dec. 
Var. 2. Leaf without serratures, or only a few at the base. Huds. 576. A 
foot long, at least an inch broad. Edge unequal, less remarkably 
serrated. Doody in R. Syn. 42. I have seen this var. of not more than 
the usual breadth, but in such specimens the mid-rib extended only to a 
short distance from the stem. 
F. spira'lis. Plant flat; forked; very entire: dotted; strap-shaped 
and channelled towards the base: fructifications in pairs; tuber- 
cled. 
Stackh. 5—FI. Dan. 286— (E. Bot. 1685.— H. Ox. xv. 8. 10. E.)— Bast. ii. 
11. 1— Dod. 479. 1— Ger. Em. 1567. 4, on the right hand side — Gesn. 
Ap. Cord. Schmid, ic. lign. 1.5. 
Twisted spirally whilst growing; membranaceous, flat, narrow below, 
channelled. Fructifications terminating, oblong, thickish, in pairs, on 
fruit-stalks. Linn. A foot or more in length. Rap. Syn. 41. It has no 
air-bladders. Fructifications masses of granulations at the ends of the 
leaves, which are mostly forked, but sometimes three-cleft. These 
masses are oblong, filled with mucilage, and are the colour of a 
Spanish olive. Punctures in the leaves in a regular series, garnished 
with pencils of fibres. I have not seen the stalk channelled. Stackhouse. 
In some specimens the dots, or globules within the substance of the leaf 
on each side the mid-rib, are not disposed in a regular series, but scat¬ 
tered, and much more numerous than represented in the figure of Mr. 
Stackhouse. 
(SriEAL Fucus. E. F. vesiculosus 13. Turn. Hist.) Stones and rocks in the 
sea, Kent, Sussex, and Essex. On the coast of Devon and Cornwall, 
on rocks below high water mark. Mr. Stackhouse. P. Jan.—Dec. 
F. angustifc/lius. Strap-shaped, forked, very entire, smooth, with 
minute dots or punctures : fruit slender, pointed. 
Lately discovered by Mr. Stackhouse at Portreath near St. Ives, Cornwall. 
It resembles F. spiralis, but is not at all twisted, the breadth of the leaf 
is much less than in the kindred plants; the fruit is very narrow, 
pointed; often two-horned. Mr. Stackhouse. 
(Narrow-leaved Ei-cornate Fucus. F. vesiculosus f. E.) Turn. Hist, 
VOL. IV. g 
