Ectocarpus luteolus Sauv.

• Region

  North America

• Country

  United States of America

• State/Province

  California

• County/Municipio

  San Francisco Co.

• City/Township

  San Francisco

• Locality

  Land's End, on Pelvetia fastigiata

• Coordinates

  37.7833, -122.502

• Coordinate Uncertainty (m)

  1441.57

• Georeferencing Method

  Georeferencing Quick Reference Guide, Version 2012. Located coordinates of geogr. center of Land's End. Measured from coord. to farthest extent of the park to find linear extent (1430 m). Input info. into MaNIS Georef. Calc. to find uncert. rad. (Bounded Area).

• Geodetic Datum

  WGS84

• Distribution

  Map all specimens of this taxon

$3tehell, ,W. A. & Gardner, N. L. Melanophyeeae
Univ. Galif. Pubi. Bot. 8: 425, 192S
15. Ectocarpns luteolus Sauv.
Prostrate filaments moniliform, irregularly branched, covering, or
even occupying, the injured cells on the surface of the host, even
occasionally penetrating slightly inward, not anastomosing, but form-
ing an irregular and confused layer of almost parenchymatous aspect
emitting tortuous rhizoidal filaments from its lower cells; erect fila-
ments very short, 100-300/x high, terminating in delicate hairs (or, at
times, in seriate gametangia), simple or with a few branches from
near the base; cells of the erect filaments short, swollen, and nearly
globular below, cylindrical and longer above, about 8/x broad, 1.5 times:
as long as broad ; chromatophores few in each cell, band-shaped ; zoo-
sporangia terminal on short basal branchlets, oblong-ellipsoidal,
26-30/a long, 16-18/i broad; gametangia narrowly cylindrical, con-
sisting of single or double rows of loculi, 30-80/* (in ours about 30-45/*)
long, 7-13/* (in ours 11-13/t) broad.
Forming small expansions on the surface of the lower portion of
Pelvetiopsis limitata f. ‘ typica Gard. Central California (San
Francisco).
Sauvageau, Sur. quelq. alg., 1892, p. 79 (p. 42 in repr.), pi. II,
figs. 14-19; Collins, Holden and Setchell, Phyc. Bor.-Amer. (Exsicc.),
no. 1233. Streblonema luteolum De-Toni, Syll. Alg., vol. 3, 1895,
p. 575.
Ectocarpus luteolus Sauv. is one of the species which seems inter-
mediate between Ectocarpus and Streblonema. It does penetrate the
host slightly and occasionally, but it seems to grow on the lower
abraded portion of thè host, filling the hollows between and even the
426
University of California Publications in Botany I'Vìol. 8
cavities of the injured cells. Its prostrate filaments and the lower
portions of the erect filaments have moniliform, almost globular, cells
which, together with rhizoidal filaments issuing from the very basal
ones, while perfectly separate, form a thin layer or cushion, with
something of the appearance of that of Elachistea.
Our specimens seem to agree so closely with the figures and descrip-
tion of Sauvageau and to grow under such almost identical conditions,
that we must necessarily refer them to this species. Thus far it has
been detected only at Lands End, San Francisco, California, and
only on one occasion. Our specimens show zoosporangia (not hitherto
described) as well as gametangia.
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Phycotbeca Boreali-Americana.
Collins, Holden and Setchell.
1233. Ectocarpus luteolus sauv.
Sauvageau, Jour, de Bot., Vol. VI, p. 79, Pl. II, figs. 14-19, 1892.
Streblonema luteolum De Toni, Syll. Alg., Vol. Ill, p. 575, 1895.
On Pelvetia fastigiata, Land’s End, San Francisco, Califor-
nia, March 26, 1904.
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