Galaxaura fastigiata M.J.Decne.

BOTANICAL
Galaxaura fastigiataDECAisNE	ISf]
PI. XXXVII, fig. 2, and Text-figs. 20-21.	0
Sur les Corallines (1842), p. 16; J. Agardh, Spec. alg. (1876), p. 527;
De Toni, Syll. alg., vol. 4 (1897), p. 116; Kjellm., 1. e., p. 64, tab. 9, figs.
1-3, tab. 20, fig. 4; Weber van Bosse, Liste des alg. du Siboga, vol. 2
(1921), p. 213; Okamtjra, On the mar. alg. from Kotosho (Bull, of the
Biogeogr. Soc. of Japan, vol. 2, 1931), p. 109.
Syn. Galaxaura Schimperi Dcsne., 1. c., p. 116; Kjellman, 1. c., p. 61,
tab. 7, figs. 19-20, tab. 8, figs. 16-22, tab. 20, figs. 1-2.
Fig. 20. Galaxaura fastigiata Dcsne. x ca. 1.
Frond fragile, very smooth, but above densely or inconspicuously an-
nulately rugose, thickened towards the apex, loosely corymbose or almost
semiglobose, loosely equally furcate, decompound with proliferations from
the apices, or sometimes from the geniculi; axils wide; internodes
cylindraceojis or somewhat distended, long obconical; assimilating layer
consisting of loosely moniliform cells, encrusted with lime; cells of the
innermost layer obovoid or ovoid, 25-36fi in diameter; uppermost cells
obconical or semiglobose, 8-14,® in diameter; central portion consisting of
very loosely entangled filaments, running in the mucilagenous substance;
j5g	T. Tanaka
Ex Herb. K. Okaimira.
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rEW YORK ^
At m m % ? * m m m sms m m. botanical
GAROEM
Galaxaura fastigiata Dcsne*
Moroiso, Sagami Prov.
Fig. 21. Galaxaura fastigiata Dcsne.
A.	Transverse section of the frond. pclagO; Bred Sea.
x 290.
B.	Epidermal cells seen from above,
x470.
cystocarps almost spherical, scattered in
the upper portion, opening through the
wall of the frond, 250-400 n in diameter;
antheridial conceptacles also nearly
spherical or, elliptical, 200-250ft in dia-
meter. Colour yellowish green or reddish
pink or sometimes greenish red.
Japanese name. Gar agar a.
Hab. Ryukyu; Formosa; Bonin Is-
lands; Micronesian Islands. Along the
Pacific coast from Micronesian Islands to
Awa Province. Along the Japan sea,
southern parts from Toyama Bay.
Distrib. Philippin Islands; New
Caledonia; Polynesia; Malay Archi-
This is a very common species of
Galaxaura in the warmer parts of Japan.
The external appearance of abundant
specimens of this species at hand shows a very wide range of variation.
This variation is no doubt largely due to the external conditions of in-
dividuals. Some specimens from the Micronesian Islands may be taken as
G. fastigiata Dcsne., but some from Amakuisa, as G. Schimperi Dcsne.
It is very probable that these plants have been passing under these specific
names among phycologists. According to Kjellman, in general ap-
pearance of the frond and measurements of internodes, both species have
their own peculiarities. But as far as the present writer could ascertain
these two species are not distinguished in habit and structure one from the
other. The differences between both species which were mentioned by
Kjellman and others appear to be entirely a matter of individual varia-
tions. Therefore they are combined here under the specific name, G.
fastigiata Decne.
Genus Galaxaura from Japan
!6y T. Tanaka: Scientific Papers, Inst, Alg. Res. Faculty of Sei.;
Hokkaido Imp. Univ. Vol. 1. no. ś, Mr. 1936.
2. Galaxaura fastigiata Dcsne. x 1
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ŻOTAN/CAL
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NEW YORK
botanical
GARDEN
Galaxaura fastigiata Decsn.
March. 1939	Aitiakusa^ Hizen Prov*
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02180792
02180793
02180792