Ectocarpus parvus (D.A.Saunders) Hollenb.

• Region

  North America

• Country

  United States of America

• State/Province

  Alaska

• County/Municipio

  Nome Census Area

• Locality

  vicinity of Nome, Bering Sea Beach

• Coordinates

  64.4971, -165.408

• Coordinate Uncertainty (m)

  5771.57

• Georeferencing Method

  BioGeomancer, Guide to Best Practices for Georefer. Located coordinates on shore of Bering Sea closest to approx. geogr. center of Nome. Measured from coord. to farthest extent of shore; doubled = linear extent (5760 m). Input info into MaNIS Georef. Calc. to find uncert. radius (Near a Feature).

• Geodetic Datum

  WGS84

• Distribution

  Map all specimens of this taxon

Setchell, W. A. & Gardner, N. L Melanophyceae
Univ. Galif. Pubi. Bot. 8: 410, 1925
A
0^ Ectocarpus siliculosus (Dillw.) Lyngb.
Fronds tufted, feathery, loose, more or less entangled below,
yellowish or brownish, pseudodichotomously branched below, alter-
nately fecund above; branches erect or, at times, somewhat recurved,
never patent, not fascicled; sporangia ovoid to ellipsoidal, 30-66)u
(usually 50p) long, 20- 27ju. broad, sessile and erect or diverging on
a 1-3-celled pedicel; gametangia usually long subulate-conical, seldom
1925]
SetcheU-Gardner: Melanophyceae
411
NEW YORK BOTANICAL GARDEN
jpLCi__\	aIo
NEW YORK BOTANICAL GARDEN
ovoid or curved, often ending in a longer or shorter hair, 500-600//,
long and 12—25ju. broad, seldom sessile, usually short pedicelled.
Growing in quiet pools attached to other algae. San Francisco
Bay,; California.
Lyngbye, Hydrophyt. Dan., 1819, p. 131 (in part, as to. pi. 43,
fig. C); Kjellman, Handb., I, 1890, p. 78; Kuckuck, Beitr. Kennt.
Ectocarp. Art., 1891, p. 65; Collins, Holden and Setchell, Phyc. Bor.-
Amer. (Exsicc.), no. 2294. Conferva siliculosa Dillwyn, Brit. Conf.,
1809, p. 69, pi. E (excl. synonym).
We have followed Kjellman and Kuckuck in keeping Eotocarpws
siliculosus distinct from E. confervoides and in laying emphasis upon
the presence of elongated slender gametangia, some of which are
piliferous, as its chief characteristic. We know full well from our
own experience that it is difficult to draw a satisfactory line of
demarcation between the two species, but feel that the best we can
do is to keep them distinct and draw the line somewhat arbitrarily.
The existence of such forms as Ectocarpus confervoides f. parvus
(Saunders) S. and G. indicates that there are perplexing forms whose
relationships and origins are perhaps impossible to formulate, but
otherwise, so far as the plants of our coast thus far discovered are
concerned, there seems little doubt that they conform to the original
idea of E. siliculo'sus.
The plants distributed in the Phycotheca Boreali-Americana
.(loc. cit.) are the only characteristic plants of the species known on
our coast. These were taken from a quiet pool in a salt marsh on
Bay Farm Island, Alameda, California.
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