Chondria acrorhizophora Setch. & N.L.Gardner

• Region

  North America

• Country

  Mexico

• State/Province

  Baja California

• Locality

  Lower California, Eureka, near La Paz

• Coordinates

  24.1163, -110.302

• Coordinate Uncertainty (m)

  7831.57

• Georeferencing Method

  Georeferencing Quick Reference Guide, Version 2012. Located coordinates of geogr. center of La Paz. Measured from coord. to farthest extent of the city to find linear extent (7820 m). Input info. into MaNIS Georef. Calc. to find uncert. rad. (Bounded Area).

• Geodetic Datum

  WGS84

• Distribution

  Map all specimens of this taxon

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BOTANICAL

ALGAE DISTRIBUTED FROM THE
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224. Chondria acrorhizophora S. & G.

Eureka, near La Paz, Lower California.
Co-type.

Mrs. Daisy R. Marchant, No. 44.

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Chondria acrorhizophora Setchell & Gardner, sp.nov.
Proc.Calif.Acad.Sci.17.12:766. pl.40. b. 13 My 1924.

Fronds 4-5 cm. high, 500-700 p. diam., decomposite-
ly branched from near the base; main frond at times per-
current, more frequently divided into several secondary
branches, the lower branches longest,forming a flat top,
more or less resembling an inverted cone; the ultimate,
tetrasporic ramuli numerous on all of the branches of 0
different orders, 1-1.5 mm. long, standing at about 45°
angle, constricted at the base, curved at times almost
cirrhose at the apices; apices of the main branches
nude for some distance, acute, usually uncinate; the sub-
terminal rainuli frequently developing dense clusters of
rhizoidal cells; pericentral cells, 5, large, surrounded
by one layer of smaller, thick walled, angular cells, and
the cortex composed of a single layer of cells; cortical
cells thick walled, irregular in shape, 2-6 times as long
as broad in surface view, decidedly elongated radially in
cross section; pericentral cells of the lower parts of the
main fronds having parts of the walls very much thickened.

Cast ashore. Eurêka, near La Paz, lower California.
Type, Marchant, no. 44, May.

Chondria acrorhizophora resembles in form and size
C. lanceolata Harv. but our specimens are terete through-
out while C. lanceolata, as figured by Harvey in Phyc.
Austral,, plate 239, is flattened. A nearer relative, as
it seems to us, may be found in C. tenuissima f .californica
Collins, in Phyc.Bor. Amer. (Exsicc.) no. 636, from La Jolla,
California. These plants are more robust than ours and have
a distinctly different cell structure.

BOTANICAL ^

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