Gigartina eatoniana J.Agardh

• Region

  North America

• Country

  United States of America

• State/Province

  California

• Locality

  Cast ashore about 7 mi. north of Venture

• Coordinates

  34.376, -119.231

• Coordinate Uncertainty (m)

  14246.7

• Georeferencing Method

  Georeferencing Quick Reference Guide, Version 2012. Located coordinates of geogr. center of Ventura. Measured from coord. to farthest ext. of city = linear ext (8500m). Input info (incl. offset 11.265 km N) into MaNIS Georef. Calc. to find offset coord. + uncert. (Offset at heading).

• Geodetic Datum

  WGS84

• Distribution

  Map all specimens of this taxon

NEW YORK
&OTA.NlCAk
(jARDEH
11. Oigartina Eatoniana J. Ag.
Plate 51
/
J. G. Agardh, Anal. Alg., Cont. V: 11, 1899; De Toni, Syll. Alg., 4, 5:178, 1924.
Of this species, J. G. Agardh gave neither a complete diagnosis nor
any detailed description. He states that the Californian phycologists
have held various views concerning it, some considering it to be a young
form of G. spinosa, others, as a form of 0. Harveyana, while others have
held it to be the true 0. volans. J. G. Agardh regards it as related to the
South African G. insignis, yet the Californian plant, he says, bears the
cystocarps in rather elongated marginal pinnae, and possibly several on
the same pinna, while others, on the uppermost parts of pluriseriate pin-
nae emerging from the surface itself, are subsessile, at times topped by
a sterile apiculus. The representation of this species in Herb. Agardh
at the University at Lund consists of three specimens, two of them sent
by Daniel C. Eaton (no. 23593), and a sterile plant, probably juvenile,
sent by Mrs. Bingham from Santa Barbara. The species seems closer to
G. spinosa than to G. protea, but differs from the former in being rather
a thinner plant, more branched, and with the marginal cystocarps borne
on slender non-decurrent pinnules. It does not seem to be common in
southern California but a few specimens in the Herbarium of the Uni-
versity of California may be referred to it.
J. G. Agardh compares Gigartina Eatoniana (Anal. Alg., Cont. V :11,
1899) with G. insignis (Endl. et Dies.) J. Ag., of the South African
region, but that species is clearly different, being thick (although fairly
broad) and strictly distichous. G. insignis seems to belong, along with
G. disticha (Sond.) J. Ag., with G. pistillata in Eugigartina.
UNIV. CALIF. PUBL. BOT. VOL.
[SETCHELL-GARDNER] PLATE 51
02196262
algks: op....C.a.i.i.i?.O.rnifl................
Gigartina Eatoniana J. Ag. (cystocprpic)
Cast ashore about 7 mi. north of Venture
Johnstone No. 7545	Aug. 1933
[ 311 ]
Gigartina Eatoniana J. Ag. Type Sheet, Herb. Agardh.
Univ. Calif. Pubi. Bot. Vol. 17, Plate 51. Satchell-
GarcLner.
02196262