CRYPTOGAMIA. ALGAL Fucus. 
87 
Dr. Smith observes,, ee this Fucus can be confounded with no other, if 
attention be paid to the singular mammillary tubercles which cover both 
sides of its uppermost ramifications, each of which contains a cluster of 
dark-red seeds. In habit and colour varying from red or pale purple to 
a pale greenish brown, it agrees with F 1 . crispus , but is, more channelled, 
and generally sharper-pointed.” Mr. Turner also fully confirms their 
being truly and essentially distinct.” 
Mammillary Fucus. F. canaliculatus (3, Huds. F. ceranoides. With. 
Sphcerococcus mammillosus . Agard. Hook. Frequent on the coast of 
Yarmouth, Cornwall, &c. Sept. E.)* 
F. stella'tus. Cartilaginous, forked, greatly widening upwards: 
surface thick set with excrescences bearing fructifications on 
their extremities. 
Plant four inches high, beautifully hedge-hogged, with excrescences, some¬ 
times on one, sometimes on both surfaces. They are upright, partly 
cylindrical, fleshy, bearing the fructifications imbedded in their tops. Its 
colour is brown, purple, or bright green. Mr. Stackhouse. 
Mr. Lightfoot tells us that the upper segments are numerous, often crowded, 
not properly forked, but growing either in a stellated or finger-like form. 
(Hedge-hogged Stellated Fucus. E.) F. ceranoides d, Huds. /3, Lightf. 
Fucus ceranoides albidus, ramulorum apicibus stellatus. Hay. Syn. 44. n. 18. 
F. canalicula'tus. Flat, forked, very entire, strap-shaped, grooved: 
fructifications terminating, tubercled, divided into two parts, 
blunt. Linn. Syst. Nat. Ed. 12. 716*. Syst. Veg. Ed. 13. 
and 14. 
{Tarn. Hist. 3 — E.Bot. 823. E.)— Gmel. 1. A. 2 and 3 — FI. Dan. 214 — II. 
Ox. xv. 8. row 2. 11. 1. and row the last , 12 — Velley 1 ; Fructification. 
Many times forked, smooth, narrow, one side convex, the other channelled. 
Fructifications terminating, dividing into two, or in pairs, sessile, sprinkled 
with perforated tubercles. Linn. Grooved, or cut into longitudinal 
hollows on one surface. Stems and leaves ribless. Gmel. Fuc. 73. 
Seldom exceeds three or four inches in length, but covers the surface of 
the rocks for many yards square. It has fruit-bearing and barren 
branches at the same time, the former appearing to be two years old or 
more. The ends are g.lmost or quite yellow when ripe, and much tuber¬ 
cled. Th e fructification is precisely analogous to that of F. vesiculosus, 
but the seeds are larger. Mr. Stackhouse. 
(Grooved Many-forked Fucus. E.) F. excisus. Linn. Sp. PL 1627. 
Syst. Nat. Ed. 12. 715. Huds. Ed. 1. 460. Rocks and stones in the sea. 
P. June—Aug. 
F. pygma^us. Gristly, compressed, ribless, hand-shaped: fructifica¬ 
tions, terminating, roundish ; perforated at the end. 
(Turn. Hist. 204— E. Bot. 1332. E.)— Lightf. 32. 1. atp. 948. 
Gristly, black; dark green when held against the light; seldom more than 
a quarter of an inch high. Lightf. It has the appearance of a moss in its 
crowded growth, entirely covering the surface of the rocks, in patches; 
is hard and brittle like a Lichen, and may be considered as amphibious, 
being under water only at the time of high tide. 
* (“ This species, as.also F. crispus, melts on boiling, and afterwards hardens into 
a gelatine, which I do not despair of seeing hereafter employed to useful purposes.” 
Turn. Hist. E.) 
