P l a t e CXVIII.
CHYLOCLADIA OVALIS, H o o k .
Gen . Char. Frond (at least the branches) tubular, constricted a t regular
intervals, and divided by internal diaphragms into joints, fflled with a
watery juice, and traversed by a few longitudinal fllaments ; periphery
composed of small, polygonal cells. Fructification of two kinds on
distinct individuals ; 1, spherical, ovate or conical capsules (ceramidia)
containing a tu ft of wedge-shaped spores on a central placenta. 2,
trip a rtite tetraspores, immersed in th e smaller branches, near th e ir
apices. Chylocladia [Orev.),— from juice, and kAôSos, a
Chylocladia ovalis; frond cylindrical, solid, irregularly dichotomous,
naked below, above beset with simple, eUiptical, rarely elongated and
jointed, tubular ramuli ; capsules spherical, with a wide transparent
border.
C h y lo o la d ia ovalis. Hook. Br. M. vol, ii. p . 3 9 7 . Wyatt, Alg. Banm.
no . 1 1 4 . H a n .inM a c k .M .H tb .'p a A 3 .-p .V ih . Harv. Man.-p. 1 \.
G a s t r id iu m ovale, Grev. Alg. Brit. p . 1 1 6 . 1 . 1 4 .
G a s t r o c l o n ium ovale, Kiitz. Fhyc. Gen. p. 441.
L o m e n t a r ia ovalis, Endl. 3rd Suppl. p . 4 3 .
C h o n d r ia o valis, Ag. Sp. Alg. v o l. i. p. 348. Ag. Syst. p. 304. Spreng.
Syst. Veg. p. 343.
G ig a r t in a vermicularis, lamour. Ess. p. 48. t. 4. f. 8, 9,1 0 .
F u cu s ovalis, Huds. El. Ang. p. 573. Sm. E. Bot. t. 711. Turn. Syn. t. 30.
Turn. Hist. Eue. t. 81.
F u cu s vermicularis, Gm. Hist. p. 163. t. 18. f. 4. Lightf. M. Scot. p. 958.
Fu cu s sedoides, Good, and Woodw. in Linn. Trans, vol. iii. p. 117. Stack.
Ner. Brit. p. 67. 1 .13.
H ab. On rocks and stones within tide marks. Annual. Spring and
summer. Frequent on the southern shores of England, and on the
Irish coasts. Scarborough, Hudson. Little Isles of Jura, Lightfoot.
Papa Westra, Lieut. Thomas and Dr. Me’Bain. Jersey, Miss Turner.
Geogr. Distr. Atlantic coasts of Europe. Adriatic Sea. North-west coast of
America.
Descr. Root accompanied by grasping branched fibres. Eronds tufted, erect,
from two to ten inches high, cylindi-ical, as thick as small twine, of nearly
equal diameter throughout, irregularly dichotomous or vaguely divided, the
lower half simple and mostly naked, the upper more or less closely forked,
all the lesser divisions clothed with imbricated, crowded, obovate or oblong,
obtuse, saccate ramuli. In some specimens these ramuli are simple, exactly
elliptical, composed of a single joint, and tapering at base into a
minute petiole ; in others they are linear-oblong, composed of several joints.