Ser. RHODOSPERME. Fam. Ceramiea. 
Puate CXXXIX. 
CERAMIUM CILIATUM, Dueuz. 
Gen. Cuar. Frond filiform, one-tubed, articulated ; the dissepiments coated 
with a stratum of coloured cellules, which sometimes extend over the 
surface of the articulation. Fructification of two kinds, on distinct in- 
dividuals ; 1, ¢e¢raspores, either immersed in the ramuli, or more or less 
external; 2, sessile, roundish receptacles ( favellz), having a pellucid 
limbus, containing minute, angular spores, and subtended by one or 
more short, involucral ramuli. Crramtum (Roth.),—from xepayos, a 
pitcher, but the fruit is not pitcher-shaped. 
f= 
-Ceramium ciliatum; frond slender, of nearly equal diameter throughout, 
_. __ rigid, repeatedly dichotomous, with or without lateral branchlets, 
: fastigiate, the apices strongly involute ; articulations pellucid, those of 
the middle of the stem from three to four times longer than broad, the 
upper gradually shorter ; dissepiments coloured, furnished with a whorl 
of robust, subulate, three-jomted prickles; tetraspores alternating 
~ with the prickles; favellee subtended by two or three ramuli. 
Ceramivum ciliatum, Dvcluz. Ess. p. 64. Lyngb. Hyd. Dan. p.121.t. 37. Ag. 
Sp. Alg. vol. ii. p. 153. Hook. Fl. Scot. part 2. p. 14. Grev. Fl. Edin. 
p. 311. Harv. in Hook. Br. Fl. vol.ii. p. 336. Harv. in Mack. Fl. Hib. 
part 3. p. 211. Harv. Man. p.100. Wyatt, Alg. Danm. no. 180. J. Ag. 
Alg. Medit. p. 81. J. Ag. Advers. p. 26. Mont. Fl. Algier. p. 145. 
CERAMIUM diaphanum, var. ciliatum, Dudy, Bot. Gall. p.967. Ag. Syst. 
p. 134. 
Ecutnoceras ciliatum, Kiitz. in Linn. vol. xv. p. 736. Kiitz. Phyc. Gen. p. 380. 
: Boryna ciliata, Gratel. Bory, Dict. Class. Fl. Pelop. p. 17. 
; ConFerva ciliata, Ellis, Phil. Trans. vol. lvii. p. 425. t. 18. fig. 2.H. Huds. 
’ Fl. Ang. p. 599. Lightf. Fl. Scot. p. 998. With. Br. Pl. vol. iv. p. 137. 
Dillw. Conf. p. 77. t.53. EB. Bot. t. 2428. 
Conrerva pilosa, Roth. Cat. Bot. vol. ii. p. 225. t. 5. f. 2. 
‘ 
' 
Has. On rocks and stones in the sea, either in tide pools or exposed at 
low water; also attached to Corallines and other Alge. Annual. 
Summer. Not uncommon on the British shores, from Orkney to 
Cornwall. 
Grocer. Distr. Dispersed throughout the Atlantic and Pacific Oceans, in tem- 
perate latitudes of the northern and southern hemisphere. 
Descr. Fronds forming dense tufts, from three to six inches in diameter, as fine 
as human hair, nearly of equal diameter throughout, rigid, harsh and rather 
brittle, repeatedly dichotomous, occasionally furnished with lateral dichoto- 
x: mous branchlets, fastigiate; the apices strongly hooked inwards; azvils 
. rather patent. Articulations colourless, those of the lower parts of the 
a * VOL. II. F 
