Ectocarpus breviarticulatus J.Agardh

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FLORA OF COSTA RICA
IiIMON PROVINCE
C. W. Dodge NEW YORK	¿fo/rA 20, 1930.
B. W. Dodge	BOTANICAL
W. S. Thomas	GARDEN.
NEW YORK BOTANICAL GARDEN	
	
	02233037
Setehell W. A. & Gardner, N* L. Melanophyeeae
Univ. Galif. Publ. Bot. Qt 429, 192§
^	. 20. Ectocarpus breviarticulatus J. Ag.
Fronds tufted, 2-4 cm. high, arising from creeping filaments; erect
filaments about 27^ broad (35-45ju, fide Kuetzing and De-Toni), either
sparingly branched or more or less beset with short branchlets, both
branches and branchlets attenuated toward the apex and hooked,
intertwined into rope-like masses; cells usually 1.5-2 times $s long as
tiwlimsity of California Publications in Botany [Vol. 8
broad; chromatophores disk-shaped, several in each cell; zoosporangia
unknown; gametang'ia from nearly spherical to broad ovoid, about
62/u. long, 57f, broad.
On Chnoospora pacifica. West coast of Mexico (St. Augustin).
J. Gr, AgaiSI, Nya Alger fy&n Mexico. 1847,, p. 7, Sp. Alg., vol. 1,
1848, p. 16; Kuetzing, Spec. Alg., 1849, p. 45.3; Borgesen, Mar. Alg.
Dan. West Indie's, pt. 2, 1914, p. 173, fig. IBS. Ectocarpus hamatus
Crouan, in Maze et Schramm, Ess. Class. Alg. Guad. (ed. 2), 1870-77,
p. Ill {fide Borgesen); dickers, Phyc. Barbad., pt. 2,. 1908, pi. 29.
Ectocarpios	J. Ag. is known to us as a member of
onr flora only from the literature and particularly from Borgesen’s
(loc. c0J) account of it. It seems closely related to E. oviger, from
which it differs: chiefly in size and branching;,, and slightly in dimen-
sions of filaments and gametangia. Both Kuetzing and Borgesen
state that they have examined cotypes and may be, therefore, con-
sidered to have spoken with authority. We have been enabled to
study what certainly seems to be this species in material from
American Samoa (cf. Setehell? Veg. Tut. Isl., p. 171, fig. 37).
NEW YORK
BOT AN ICAL
02233037