_ Ser. RHoposPERME. ; Fam. Ceramiea. 
Pruate CCXV. 
- CERAMIUM BOTRYOCARPUM, cif. 
. 
| 
_ Gey. Cuar. Frond filiform, one-tubed, articulated; the dissepiments 
| coated with a stratum of coloured cellules, which sometimes extend 
| over the surface of the articulation. ructification of two kinds, on 
distinct individuals ; 1, ¢e¢raspores either immersed in the ramuli, or 
: more or less external; 2, sessile, roundish receptacles (favelle), 
| having a pellucid limbus, containing minute, angular spores, and 
subtended by one or more short, involucral ramuli. CrRamiuM 
(Roth.),—from xepapos, a pitcher, but the fruit is not pitcher-shaped. 
Crramium Jotryocarpum ; filaments crooked at the base, robust, gradually 
attenuated upwards, irregularly dichotomous, with numerous lateral, 
mostly simple ramuli, the apices straight; articulations coated with 
coloured cellules, unarmed, the lowermost twice as long as broad, the 
upper shorter than their breadth; dissepiments constricted ; tetra- 
spores immersed in the articulations, whorled; favelle globose, of 
small size, heaped together in irregular clusters, borne on the lateral 
branchlets, destitute of involucral ramuli. 
CERAMIUM botryocarpum, Griff. in Herb.— Harv. Phyc. Gen. in list of species, 
vol. i. pl. xi. 
Has. On rocks and Alge, between tide-marks. Annual. Summer. 
Discovered on Preston rocks, Torquay, by Miss Amelia E. Griffiths, 
(1844.) Ardrossan, Rev. D. Landsborough. 
Grocer. Distr. British Islands. 
Descr. Root scutate, with imperfect fibres. Stems sharply hooked or curved at 
the base (not well shown in figure), thicker than hogs’ bristles, gradually 
attenuated upwards, three to five inches long, several times branched in a 
more or less regular dichotomous manner, the branches erect, with sharp 
and narrow axillz, the apices sometimes level-topped, sometimes of unequal 
length, straight, not hooked inwards. The stem and main branches are 
very generally clothed with short, densely and irregulary inserted, simple 
or rarely forked, subulate or fusiform ramuli, two or three lines in length, 
and tapering to both extremities, much more slender than the parts from 
which they spring, but otherwise of similar structure. Articulations 
coated with a stratum of minute, coloured cells, those of the lower part of 
the stem twice as long as broad, those of the upper about equalling their 
breadth; dissepiments opake, constricted. Fructification; 1, tetraspores 
dark purple, several in the same joint, arranged transversely, immersed, 
very slightly prominent. 2, favelle small, round, heaped together like 
clusters of grapes, irregularly placed on the sides of the lateral ramuli, 
destitute of involucre. These are commonly produced in great profusion ; 
but I have oecasionally observed solitary favelle, furnished with an invo- 
VOL. Il. 2A 
