= ; 
Ser. RuoposPERMEZ. Fam. Ceramiee. 
| Puate CXXXVII. 
CALLITHAMNION BRACHIATUM, Bonnem. 
Gun. Cuan. rond rosy, or brownish-red, filamentous; stem either opake 
and cellular, or translucent and jomted; branches jointed, one-tubed, 
mostly pinnate (rarely dichotomous or irregular) ; dissepiments hyaline. 
Fruit of two kinds, on distinct plants: 1, external tetraspores, scat- 
tered along the ultimate branchlets, or borne on little pedicels; 2, 
roundish or lobed, berry-like receptacles (/avell@), seated on the main 
branches, and containing numerous, angular spores. CALLITHAMNION 
(Lyngb.),—from «adds, beautiful, and Capriov, a Little shrub. 
CALLITHAMNION brachiatum; outline of the frond lanceolate ; stem cartila- 
ginous, subsimple, setaceous, somewhat opake, veiny, set with sub- 
quadrifarious, lateral branches, often furnished with a second series ; 
penultimate branches pellucidly jointed, slender, elongate, set with 
short, alternate, very erect, level-topped plumules, the lowermost of 
which are most simple; ramuli erect, subulate, not narrowed at base, 
gradually tapering to a fine point, their articulations twice as long as 
broad, cylindrical ; tetraspores minute, oval, near the tips of the ramuli. 
CALLITHAMNION brachiatum, Bonnem. (sec. Lenorm. in Herb.) 
CALLITHAMNION Harveyanum, J. dy. in Linn. xv. p.45. Endl. 3rd Suppl. 
. p. 34. ’ 
CALLITHAMNION granulatum, Harv. in Br. Fl. vol. ii. p. 334 (not of Agardh). 
Harv. in Mack, Fl. Hib. part 3. p. 215. 
Has. Parasitical on the larger Alge, frequently on Laminaria digitata, 
Codium tomentosum, &c. Stafla, Capt. Carmichael. Orkney, Rev. J. 
HI. Polleafen ; Messrs. Thomas and M’c Bain. Torbay and Ilfracombe, 
Mrs. Griffiths. West of Ireland, W.H.H. Jersey, Miss Turner. 
Probably general, but frequently confounded with C. tetragonum. 
Groer. Distr. Atlantic shores of Europe. 
Duscr. Root scutate. Fronds densely tufted, from two to four inches long, 
with a lanceolate general outline. Stems simple, distinctly jointed through- 
out but vemy, smooth, furnished from the base with numerous closely-set, 
alternate, subquadrifarious, erecto-patent lateral branches, of which those 
toward the middle of the stem are longest, the upper ones gradually de- 
creasing. These are commonly simple, but in larger specimens bear a 
second series of lesser branches. Penultimate branches from a quarter to 
half an inch long, erecto-patent, subquadrifarious, set with alternate, very 
erect plumules in their upper part, below with simple or once forked sub- 
ulate ramuli; plumules subsimply pinnate, level-topped, their pinnules very 
erect, subulate, not narrowed at base, perfectly cylindrical and gradually 
tapering to a fine point, somewhat incurved. Tetraspores small, elliptical, 
borne on the uppermost pinnules, near their tips. Favelle simple. or bi- 
lobed, at the apices of shortened plumules. 4rticulations of the main stem 
from twice to thrice or four times as long as broad; of the ramuli about 
