I I
Boev . imp .
P l a t e XCI.
PADINA PAVONIA, Lamour.
Gen. Char. Root coated with woolly fibres. Frond flat, ribless, fan-shaped,
marked at regular distances with concentric lines, fringed with articulated
filaments; apex involute. Frnctification, linear, concentric
sori, bursting through tbe epidermis of the frond, containing at maturity,
numerous obovate utricles or tetraspores, fixed by their base, and
containing four sporules. P adina—^a name invented by Adanson,
who has not explained the meaning.
P a d in a Favonia; frond between membranaceous and coriaceous, broadly
fan-shaped, entire or deeply cleft, powdery on its outer surface;
concentric lines numerous.
P a d in .y Pavonia, Lamour. Diet. Class. d ’Hist. Nat. vol. 12. p. 589.
Diet. Hist. Nat. vol. 53. p. 371. Greo. Alg. Brit. p. 62. t. x. Hook. Br.
J"/. vol.ii. p. 281. Harv. M a n .-ÿ. 33. Wyatt, Alg. Danm. wo.11. J .A g .
Alg. Medit. p. 39. Endl. 3rd Suppl. p. 25. Menegh. Alg. Ital. and Balm.
p. 239. Monlg. Hist. Cuba, p. 67. Cell. Canar. p. 145. Alger, p. 33.
P a d in a Mediterránea, Bory, Moree, p. 75. Montag. Crypt. Alg. n. 79.
D ic t y o t a Pavonia, Lamour. Ess. p. 57.
Z o n a r ia Pavonia, Ag. Sp. Alg. vol. i. p. 125. Ag. Syst. p. 263. Spreng.
Syst. Veg. vol. iv. p. 326. Kütz. Phyc. Gen. p. 341. t. 22. f. 1.
U lva Pavonia, Linn. Syst. Nat. p. 719. Esper. App. t. 4. E. Bot.
t. 1276. Lerf. El. Atlant. vol. ii. p. 428. Both. Cat. vol. ii. p. 240.
vol. iii. p. 333.
U lv a cucuUata, Cav. Ic. vol. ii. p. 73. 1 .191. f. 3. E.
Eucus Pavonius, Linn. Sp. FI. vol. ii. p. 1630. Wulf. Crypt. Ag. p. 33.
H a b . On rocks in shallow pools, at half-tide level. Annual. Summer and
autumn. Several places along the southern coasts of England ; abundant
at Torquay. Jersey, Miss White and M u s Turner.
G e o g r . D i s t r . Atlantic shores of France and Spain. Very abundant in the
MediteiTanean. Tropical, Atlantic, aud Indian Oceans.
D e s c r . Boot, an expansion, densely coated and cushioned with woolly filaments.
Eronds tufted, two to five inches in height, cuneate and attenuate at the
base, broadly fan-shaped upwards, simple, or cleft from the summit into
several lobes, which as they increase in size, gradually acquire a fan-shaped
outline, the apical margin being circularly curved. The whole frond of
young plants, and the several lobes of those further advanced, are, when
growing, curled round into funnel-shaped eups. At distances of one to
two lines the frond is marked with concentric bands, along each of which
a fringe of orange-coloured articulated filaments, of extreme tenuity, and
about two lines in length, extends. These, which originally have clothed
every hand or zone, are seldom found perfect, except on the two or thi-ee
uppermost, and on the marginal one ; falling away as the frond advances.
The margin at the summit of the frond is strongly rolled inwards ; the
outer or lower surface, is covered, more or . less perfectly, with a white,
chalky powder; the inner, except for the fringes of filaments, is smooth,
and of a yellowish olive, reddish towards the base, and greenish toward the
apex. Substance thickish, subcoriaceous below, delicately membranous
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