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P l a t e CLIX.
CALLITHAMNION BORRERI, Ag.
G e n . C h a u . Frond rosy, or brownish red, filamentous; stem either opake
and cellular, or translucent and jointed; branches jointed, one-tubed,
mostly pinnate (rarely dichotomous or irregular); dissepiments hyaline.
F ru it of two kinds on distinct plants; 1, external tetraspores, scattered
along the ultimate branchlets, or borne on little pedicels; 3,
roundish or lobed, berry-hke receptacles {favellce) seated on the main
branches, and containing numerous, angular spores. C a l l i t h a m n i o n
[Lgngb.],—from koKos, beautiful, and Sagviov, a little shrub.
C a l l i t h a m n i o n Borreri ; much branched, sub-distichous, rigid or flaccid ;
branches set with distichous plumules wHoh are bare of ramuli in
their lower half, and simply pinnate in their upper ; pinnæ long,
patent, subulate, simple (or ramulose at top), the lowermost longest;
articulations of the branches 3-B times, of the pinnæ about twice as
long as broad ; tetraspores roundish, sessile on the inner face of the
pinnæ ; faveUæ two-lobed, near the apex of the lesser branches.
Callithamnion Borreri, Ag. Sp. Alg. vol. ii. p. 170. Ilarv. in Hook. Br.
M .Y o l.ii. p. 844. Harv. Man. p, 110. Endl. 3rd Suppl. g. 34. Kiitz.
Phjc. Gen. p. 373.
Callithamnion semiuudum, Ag. Bot. Zeit. 1837. p. 637. Ag. S p .A lg .
vol. ii. p. 167. Harv. in Hook. Br. El. vol. ii. p. 344. Wyatt, Alg. Banm.
no. 187. J. Ag. Alg. Medit. p. 73. Endl. 3rd Suppl. p. 34.
Ceuamium pinnulatum, Ag. Syst. p. 139.
Ce eamium miniatum, Ag. Syst. p. 141.
CoNEBEVA Borreri, Sm. E. Bot. t, 1741.
H a b . On mud-covered rocks near low-water mark. Annual. Summer.
Rather rare. Yarmouth, M r. Borrer. Torquay, Mrs. Oriffiths.
Sidmouth, M m Cutler. Ilfracombe, Land’s End, and Swansea, Mr.
R a lfs . Falmouth, Miss Warren. Remarkably fine at Plymouth,
R ev. W. S. Hore, M r. Rohloff, and B r . Cocks. Clontarf, Miss B a ll.
Howth, Miss Gower.
Geo g e . D is t e . Atlantic shores of France and Spain. Mediterranean and
Adriatic Seas.
D e sc e . Eronds densely tufted, from one to four or five inches in height, the
larger specimens excessively branched, capillary, many times divided in an
alternately pinnate manner ; branches more or less distichous, long, clothed
with three or four series of lesser branches, the last of which are set with
alternate, distichous plumules, from a quarter to nearly half an inch in
length. Plumules issuing at almost every joint, alternate, patent, slender,
naked in the lower part to a point beyond their middle ; the upper half
pinnate, a pinna issuing from every joint. Pinnæ alternate, subulate, the
lowest longest, the rest gradually shorter to the apex. On luxuriant specimens
I have frequently observed slender, root-hke fibres to issue from the
lowest joint of a plumule (fig. 9). Articulations of the stem from three to