r ia k .YXX/X. ..III
j
Ser. CHLOUOSPEBMBAi. Fam. Vhiacea.
P L .V fE XXXIX.
ULVA LINZA, Linn.
Gen . Chab. Frond membranaceous, green, expanded, plane (in some cases
saccate when young), composed of irregular cellules. F ructification;
granules, often arranged in fours, scattered over the whole frond.
—supposed to be from Ul, water in Celtic.
U lv a L in z a ; frond linear lanceolate, acute, crisped at the margin, composed
of two membranes closely applied.
U lva Linza; Unn. Sp. FI. p. 1633. Lightf. FI. Scot. p. 973. FI. Ban. t. 889.
Eoth. Cat. vol. ii. p. 246, and vol. hi. p. 330. J g . Syn. p. 40. Spec. Mg.
vol. i. p. 413. Lyngh. Hyd. Ban. p. 32. Gi'ev. FI. Fdin. p. 399. Alg. B n t.
p 173. /ioojii.-Sr. vol. ii. p. 311. Harv. inMacJc.Fl.Hih.'^^xi'^.^.'^^'^-
Man. p. 171. Wyatt. Alg. Banm. no. 164. J. Ag. Alg. Medit. p. 17.
S oL EN iA Linza, Ag. Syst. p. 185.
P h y c o s e r is Linza, Kiitz. Fhyc. Gen. p. 297.
T e em e l l a marina fasciata. Bill. Muse. p. 46. t. 9. f. 6.
H a b . On rooks and stones in the sea, at half-tide level. Annual. Summer.
Not uncommon.
G e o g r . D is t b . Atlantic and Mediterranean shores of Europe. New Zealand.
D e s o b Boot a small caEus. Fronds from six inches to one or even two feet m
length and from half an inch to two inches in width, linear-lanceolate,
attenuated towards the base, and more or less tapering at the apex waved
and curling at the margin, membranaceous; composed of two distinct
membranes closely applied together. Fructification scattered over the whole
frond, to which it gives colour. Colour, a full, brilliant grass-green, fading
in age. Substance thin, adhering to paper in drying.
This is one of the most beantifnl of the British Ulvae, as it is
also one of the less common species. Its gracefully shaped, and
elegantly curled fronds look peculiarly well as the plant waves
freely in the water.
It has long been known to botanists, having been distinguished
by Linnceus, and has been found on very distant shores. It inhabits
the Southern as well as the Northern Oceans, probably
extending nearly as far as vegetation extends to the south, though
as yet we have not had it from any locality south of the Bay of
Islands. The frond consists of a double membrane, so that it
has been by some authors associated with the Enteromorpha;, to
which group it affords a direct passage.
IS'