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ANICAL

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THE NEW YORK BOTANICAL GARDEN

MARINE ALGAE OF PERU, COLLECTED BY ROBERT E. COKER

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BOTANICAL

QARDE^L

Eisenia Cokeri sp. nov.

Gregarious; holdfast about 4-20 cm. in diameter, of compactly
interlaced hapteres, these apparently without muciferous canals;
stipe 2.5-9.5 dm. long, compressed-terete and 1-2 cm. broad at
base, soon becoming more distinctly flattened and 1.5-3.0 cm. X
0,5 cm. above, solid, almost destitute of muciferous canals; pri-
mary lamina oblong or broadly linear, 20-30 (?) cm. long, smooth
below, becoming longitudinally rugose and about 6 cm. broad
above, once pinnate, the pinnae 6-8 on each margin, mostly rather
closely crowded near the broadly canaliculate, cucullate or con-
cavo-convex base, the 3 or 4 lowest (youngest) on each side sub-
terete or ligulate, the succeeding 3 or 4 linear with narrow long-
cuneate bases and gradually increasing in width to near their
apices, 30-60 cm. long, 0.5-1 cm. wide below, becoming i-5_4-5
cm. wide above, the highest pinnae short and subfalcate, 2-7 cm.
long; primary lamina finally replaced by two flattened and often
twisted crura mostly 2-25 cm. long and 1.5-5 cm- broad, each
terminated by a subreniform commonly ruffled and twisted expan-
sion 4-7 cm. broad and bearing 12-50 crowded sporophyls, these
becoming 1-9 dm. long and 3-6 cm. broad from narrow long-cun-
eate bases, simple, or occasionally furcate, or rarely with one or
two short lateral branches, 1-1.3 mm. thick near base, 0.3-0.55

56

Laminariaceae

mm. thick above, rather coarsely serrate, the surface strongly
and coarsely rugose longitudinally, bearing rarely a submarginal
series of teeth, otherwise without appendages, the larger of the
marginal teeth bifid or bearing 1 or 2 smaller teeth; muciferous
canals wanting or inconspicuous; sori soon confluent and forming
a subcontinuous central band 1-3 cm. broad. [Plate 14, figure
A; plates 15 and 16; plate 18, figure A.]

In beach drift, La Punta, region of Callao, Jan. 25, 1907,
?Coker 28 (type); on the beach, San Lorenzo Island, Feb. 5, 1907,
Coker 71 (also in museum of Johns Hopkins University under
Coker 70); ?in the surf,? Lobos de Tierra, Apr. 2, 1907, Coker 15if;
also a photograph taken by Dr. Coker showing drift on the beach
of Sechura Bay (plate 18, figure A) with the following note:
?For miles the beach was thus strewn with weed, and almost
exclusively of one kind?a heavy brown corrugated-leaf weed
(abundant in Bay at 5 fathoms)?similar to No. 71 and similar
specimen included in 151.?

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