P l a t e XXXIII.
CLADOSTEPHUS VERTICILLATUS, Jg.
Gen. Chau. Fronds inarticulate, rigid, celltdar, whorled with short, jointed,
subsimple ramuli. Fructification; elliptical utricles, furnished with
a limbus, pedicellate, borne on accessory ramuli. Clad o step h u s [Ag)
—from kXoSos, a branch; and rrrc<t>os, a crown.
Cladostephus verticillatus; branches slender; ramuli mostly forked, regularly
whorled, the whorls at short intervals.
Cl a d o s t e p h u s v e rtic illa tu s , Ag. Syn. Introd. p . x x v . ly n g l. Hyd. Ban. p . 103.
t. 30. Hook. El. Scot. v o l.i i. p . 89. Grev. El. Edin. p . 312. Harv.in
Hook. Br. El. v o l. ii. p . 333. Wyatt. Alg. Banm. n o . 83. Harv. in Mack.
El. Hib. p a r t 3. p . 179. Harv. Man. p . 36.
Cl a d o s t e p h u s my riophyUum, Ag.Syst. p . 169. Ag. Sp. Alg. vol. ii. p . 10.
Ehidl. 3rd Suppl. p . 24. Kiitz. Phyc. Gen. p . 294. t. 18. f. 1. J. Ag. Alg.
Medit. p . 30.
Ce r a m iu m verticiilatum, BO. El. Er. vol. ii. p. 39. Bucluz. Ess. p. 49.
C o n f e r v a v e rtic illa ta , lAghtf. El. Scot. p . 9 8 4 ( 1 7 7 7 ) . Huds. El. Ang. p . 6 5 3 .
With. Arr. \o\.\Y. y>.133. Billw. Conf. 1.33. D. D o /. 1 . 1 7 1 8 a n d 2 4 2 7 .
f. 2. Both. Cat. Bot. vol. iii. p . 3 0 9 . ?
Co n f e r v a myriopliyHum, Both. Cat. Bot. vol. iii. p . 3 1 2 . 1 . 1 2 . f. b. ( 1 8 0 6 ) .
C o n f e r v a ceratopliyUum, Both. I. c. p. 311.
F u cu s verticillatus, Wulf. Crypt, no. 15. 1 .1.
H ab. On rocks, stones and corallines, within the influence of the tide.
Perennial, fruiting in \rinter. Very common on the British Shores.
G e o g r . D is t r . Atlantic and Mediterranean shores of Eui'ope, abundantly.
Cape Erio, Brazil, Tilesius.
D e s c r . Erond ultra-setaceous, 3-1 0 inches high, irregularly dichotomous, or
subtrichotomous, rig id ; branches erecto-patent, slender, slightly incui'ved,
furnished thi'oughout their length, at distances of one or two Hnes, with
whorls of short ramuli. Bamuli jointed, 1 -2 lines long, inflexed, furnished
near the apex with one or two diverging tooth-like ramelli, thus appearing
forked. Joints about as long as broad, longitudinally striate, each stria
consisting of numerous cellules. In winter most of the whorled ramuli fall
away, and the sm-face of the frond becomes clothed with UTegularly disposed,
slender ramuli, densely imbricated, ot less diameter than those of the summer,
with joints once and half as long as broad, and bi-tri-striate. These
produce an abundance of lateral, pedicellate utricles, which we regard as
the proper fruit of the plant. The apices of the summer ramuli are frequently
distended, aud sphacelate, and contain a dark mass, which may be
possibly also connected -with reproduction. Colour dark olive.
A well known species, abundant on most of the shores of