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H2 University of California Publications in Botany [Vol.8
1836, Phyc. Gen., 1843, p. 287, Sp. Alg, 1849, p. 454, Tab. Phyc,
vol. 5, 1855, p. 1!'. pi. 61, fig. II. Ectocarpus confervoides /? subulatus
Hauck, Meeresalg., 1884, p. 331 (excl. synonymy). Ectocarpus
amphibms Harvey, Phyc. Brit., vol. 2, 1848, pi. 183, Ner. Bor.-Amer.,
pari 3, 1858, p. 125.
Our plant seems to agree very well with the figures and descrip-
tion of Ectocarpus amphibms Harvey and also, although not so per-
fectly, with E. .subulatus Kuetz. They are both brackish water forms,
as are our plants. Hauck refers to his var. subulatus also Ectocarpus
drapunuildiueformis Kuetz. and E. macroceras Kuetz. Judging from
Kuetzing's illustrations, these two species may be forms of E. sili-
culosus but not to be included under f. subulatus.
2. Ectocarpus confervoides (Roth) Le Jolis
Fronds gregarious, forming expansions or tufts, 0.5-10 cm. high,
light yellowish to dark brown, sparingly to frequently branched,
branching alternate or secund, never opposite, more or less cor-
ticated ;
ing in a hair ;
branches long or short, gradually attenuated, sometimes end-
prostrate filaments irregular, branched, closely attached
to the substratum, but never penetrating it; chromatophores band-
shaped, branched, often provided with pyrenoids; zoosporangia pre-
sent in some forms; gametangia short-obovoid or longer or shorter
fusiform, suddenly or somewhat gradually attenuated toward the
blunt apex, never ending in a hair, 30-250/a (commonly 60-150/x)
long and 12-35/* thick, solitary or seriate, terminal or intercalary.
Growing on rocks, wood, and larger Melanophyceae, widely dis-
tributed in its various forms. Alaska (Yakutat Bay) to Washington
(Whidbey Island).
Le Jolis, Liste alg. mar. Cherb, 1863, p. 75 (in part) ; Kjellman,
Handb., I, 1890, p. 77 ; Kuckuck,
Beitr. Kennt. Eet. Arten, 1891, p. 69
Saunders, Alg. Harriman Exp. 1901, p. 418; Setchell and Gardner,
Alg. N.W. Amer., 1903, p. 237. Ceramium confervoides Roth, Cat.
Bot., I, 1797, p. 151, pi. 8, fig. 3. Ectocarpus siliculosus Lyngbye,
Hydrophyt. Dan., 1819, p. 131, pi. 43B.
Kjellman was the first to segregate Ectocarpus siliculosus from
E. confervoides and limit it in the sense in which it is understood
by Kuckuck and most writers since that time. Even in this narrow
sense, Ectocarpus confervoides includes some eight or ten reasonably
distinct forms, some of which may ultimately be found to deserve
specific rank. It is to be distinguished from Ectocarpus siliculosus
;