la tf LI.
%:■ 7 .
Scr. BHODOSPEK.MEÆ.
P la t e LXVII.
GRIFFITHSIA EQUISETIFOLIA, Ag.
G e n .C h a e . Frond rose-red, filamentous; filaments jointed throughout,
mostly diohotomous; ramuli single tu b e d ; dissepiments hyaline.
Fructijlcation of two kinds, on distinct individuals; 1, tetraspores
affixed to whorled involucral ramuli; 2 , gelatinous receptacles (fqvellm)
surrounded by an involucre, and containing a mass of minute angffiar
spores. G e i f e i t h s i a ,— so named by Agardh, in^ honour of Mrs.
Griffiths, th e most distinguished of British Algologists.
G e i f e i t h s i a equisetifolia; stems robust, cartilaginous, whorled throughout
with closely imbricated, incurved, many times dichotomous ramuli.
Re ip f ith s ia equisetifolia, Ag. Syn. p. 23. Hook. FI. Scot. U '^'1 3 3 ’
Ag. Syst. p. 143. (h'cv. M. Edm. p. 312. Ag Sp. Alg. vol 11. p. 133.
Hook Brit. M. vol. ii. p. 337. Wyatt, Alg. Banm n o ^ lS l. J. Alg.
Medit. p. 78. Harv. in Mack. El. H ii. part 3. p. 211. Endl. 3rd Suppl.
p. 35.
H a l u e u s eq u ise tifo liu s , Kiitz. Pliyc. Gen. p . 3 7 4 .
Confeeva equisetifolia, Lightf. El. Scot. p. 984. With. vol. iv. p. 133.
Billw. Conf t. 54. E. Bot. 1 .1479. Esper. Fuc. Sup. t. 4.
C o n f e e v a iu ib ric a ta , Huds. El. Ang. p . 6 0 S . Roth. Cat. v o l. ill. p . 2 8 1 .
C o n f e e v a cauceUata, Eoth. Cat. vol. ii. p . 2 3 0 .
C e ea m ium : eq u ise tifo liu in , B.C. Syn. p . 8.
H a b . On marine rooks, at extreme low water mark Perennial. S— r.
Frequent on the southern and western shores of ’
Wales, common, Mr. Ralfs. Bare in Scotland Frith of Forth,
Mr. Yalden {U g h tf). Jersey, Miss White and Miss lurner.
Geooe. Dis t e . Atlantic shores of Europe. Mediterranean Sea. Falkland
Islands, Agardli.
nvsoE Root an expanded caUus, coated with shaggy fibres. Stems mostly
s o u 5 ’C Z e e to nine inebes in height and from ^
uearlv a Une in diameter, much and irregularly branched, and clothed
thi-onghout with short ramuli, which on the
denselv agm-egated, forming an u-regular shaggy pile, but on toe younger
Z t s Z v are regn arly w hZ ed , the apices of tbe lower whorls lying closely
T e r the ba” S o f f to s i above them. Main branches long either subsimp e
or once or twice irregularly forked, or repeatedly dichotoinous, generally
furnished with numerous short, spindle-shaped, simple
laterallv and at very uncertain distances, sometimes scattered along the
W h e s Z e t im e s crowded round the apices. These are clothed throughon
“ S i M diohotomous. incurved ramuli Joints of the b m n t e
twice as lono- as broad; of tbe ramuli, 3 -4 times, swollen upwards. LaiHla;
borne on the tips of short branches, imperfectly mvolucrate, two or three
Oil