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1925] Setchell-Gardner: Melanoplujceae 695
Yendo (1907, p. 16, pi. 1, fig. 1) identifies a plant of the Japanese
waters with this form. Setchell and Gardner (1903, p. 284) also
identify plants from East Sound and Fairhaven, Washington, with
this form, and specimens from East Sound were distributed in Collins,
Holden and Setchell's Phycotheca Boreali-Americana, no. 926. On
comparison of our plants with a sheet of plants in the Herbarium of
the University of California, no. 132699, collected on the Vega expedi-
dition near Tjapka and contributed and labeled by Kjellman, Funis
evanescent f .
angustus, it has seemed best to change the determination
and to place our plants under Fucus edentat us f. costatus, under which
a detailed account is given. The plants illustrated by Yendo differ
decidedly from the Kjellman specimens referred to above, particularly
in the size of the receptacles and the prominence of the midrib. It
may be doubted whether this form really extends so far south on
either coast of the Pacific Ocean as was previously supposed, but its
occurrence farther north may well be expected.
17. Fucus evanescens f. contractus Kjellm.
Fronds 5-25 cm. high, slightly caulescent, subcoriaceous, irregularly
dichotomous or subsecund, dark brown to yellowish ;
segments mostly
strict, cuneate-linear below, linear above, 3-10 mm. wide, apices
truncate, midrib distinct below, vanishing above, cryptostomata mod-
erately abundant, 15-20 per sq. cm., inconspicuous; receptacles com-
planate, distinctly delimited, 1.5-3.5 cm. long, ellipsoidal or obcordate,
single or bifid ;
conceptacles few, but prominent.
Growing in the littoral region. Bering Sea, Alaska.
Kjellman, Om Beringh. Algflora, 1889, p. 34 ; De-Toni, Syll. Alg.,
1895, p. 202; Setchell and Gardner, Alg. N.W. Amer., 1903, p. 284;
Gardner, Genus Fucus, 1922, p. 55.
Setchell, nos. 5239, 5252 (Herb. Univ. Calif., nos. 99097, 99101),
St. Michael, Alaska; McGregor, nos. 5673, 5679 (Herb. Univ. Calif.,
nos. 99099, 99100), Golofin Bay, Alaska. Not Gardner, no. 90 (Herb.
Univ. Calif., no. 99096), Whidbey Island, Washington, sub F.
evanescens f. bursiger (cf. Setchell and Gardner, 1903, p. 285).
Kjellman does not mention in his description of this form the
decided and sudden difference between the width of the segments and
the receptacles which they bear. This difference makes the receptacles
appear stipitate, since they are over twice as wide as the base of the
segments. Presumably this is the character upon which the form is
based.