W .H - H .m t t l i t b . . E«evB.B BuliaiTL & 'Âeevç.-inif.
P l a t e CCXIV.
GRIFFITHSIA CORALLINA, Ag.
G e n . C h a r . I k o n i rose-red, filamentous; filaments jointed tliroughout,
mostly dichotomous; ramuli single tu b ed ; dissepiments hyaline.
Fructification of two kinds on distinct individuals; 1, tetraspores
affixed to whorled involucral) ramuli; 2, gelatinous reeeptacles
{ favellce), surrounded by an involucre, and containing a mass of
minute, angular spores. G r ip e it h s ia {A g ),—in honour of Mrs.
Oriffiths, the most distinguished of British Algologists.
G r ip e it h s ia corallina ; filaments dichotomous, inorassated, gelatinous ;
axüs patent ; joints swollen upwards, pear-shaped, the ultimate ellipsoid
; involucres sessüe, those containing tetraspores whorled round
the branch, those containing favell® lateral.
G r i f f it h s ia coraUina, Ag. Syn. p. 28. Hook. M. Scot. part 2. p. 84. Ag.
Syst. p. 145. Ag. Sp. Alg. vol. ii. p. 127. Harv. in Hook. Br. M. vol. ii.
p. 338. Haro, in Mack. M. Hih. part 3. p. 212. Haro. Man. p. 103.
Wyatt, Alg. Banm. no. 89. Kiitz. Phyc. Gen. p. 374. Endl. 3rd. Supp. p. 35.
Ca l l it h a m n io n corallinum, Lyngb. Hyd. Ban. p. 126.
Co n fe rv a coraUina, Innn. Sp. PI. p. 1636. Lightf. Scot. p. 988. With.
vol. iv. p. 136. Mohr. 1 s t.-p. 269. M th . Cat. Bot. y o \.m .p .2 2 6 .
' , t .98. E .B o t.i.l3 2 6 .
C o n fe r v a corallinoides, Linn. Sp. PI. ed. i. p. 1166. Huds. PI. Ang. p. 598.
C o n fe r v a geniculata, Ellis, in Phil. Trans, vol. Ivii. p. 425. 1 .18. fig. F. f.
Co n f e r v a marina gelatinosa, coraUinæ instar geniculata crassior, Bill. Muse.
vol. xxxiii. t. 6. f. 36.
H a b . On rocks near low-water mark, generally in deep pools. Annual.
Summer. Not uncommon on the British shores from Orkney to
Cornwall.
G e o g r . D is t r . Atlantic and Mediterranean shores of Europe. Faeroe Islands.
Iceland. North America. Tasmania.
D e s o r . Eoot discoid. Prends tufted, from two to six or eight inches in length,
thicker than hogs’ bristles, repeatedly and pretty regularly dichotomous,
fastigiate; the lesser branches more irregular, often alternate, slenderer
than the rest of the fi'ond, and tapering to a point. Axils in the lower
part of the frond very wide, in the upper more and more narrow. Articulations
two to four times longer than broad, more or less swollen upwards,
those near the base of the stems somewhat cylindrical, those of the medial
portions regularly pear-shaped, narrow at their lower extremity, and very
ivide above; the uppermost elliptical, connected in moniliform strings.
Bissepimenis hyaline and, as well as the border of the articulation, broad.
Pructificaiion : 1, tetraspores densely clustered in whorls round the joints,
and surrounded by an involucre of short ramnli, very unequal in size, small