Polysiphonia acuminata N.L.Gardner

• Region

  North America

• Country

  United States of America

• State/Province

  California

• County/Municipio

  Los Angeles Co.

• City/Township

  San Pedro

• Locality

  White's Point, west of San Pedro

• Coordinates

  33.7153, -118.317

• Coordinate Uncertainty (m)

  301.569

• Georeferencing Method

  Georeferencing Quick Reference Guide, Version 2012. Located coordinates of geogr. center of White Point. Measured from coord. to farthest extent of the point to find linear extent (290 m). Used MaNIS Georef. Calculator to find uncertainty (Bounded Area).

• Geodetic Datum

  WGS84

• Distribution

  Map all specimens of this taxon

1

NEW YORK
BO' A NICAL
n. ?DEN

6	7	8	9 10 T XT V

The New York
copyright reserved Botanical Garden

Polysiphonia acuminata Gardner, sp.nov.
Univ.Calif.Publ.Bot.14:100. 7 D 1927.

Fronds 5-5 ora. high, with a "branched, sparse,
prostrate part, giving rise to erect fronds,fascicu-
late , rigid, with a central percurrent axis giving
rise to a few branches near the base similar to the
main axis, these and the main axis generating numer-
ous short branches clothed with crowded, short, ult-
imate, fructiferous ramuli; the main axes, primary
branches and the ramuli all gradually attenuated
from the base upward; central filament composed of
relatively small cells surrounded by 4 very large
pericentral cells, not corticated; fructiferous
ramuli with numerous short, fragile hairs; tetra-
sporangia large, spirally arranged in swollen, terminal
fructiferous ramuli; cystocarps numerous, sessile,sub-
spherical; antheridia not observed; color dark purplish
red, almost black on drying; adhering well to paper.

Attached to other plants as a rule, but also on
rocks in small tide pools in the upper littoral belt.
White’s Point, west of San Pedro, California.

Type, Gardner, no. 1968 (Herb. Univ.Calif.no.
276437). June. A part of the same collection was dis-
tributed in Collins, Holden and Setchell, phyc.Bor.
Amer. (Exsicc.), no. 1599, under Streblocladia
camptoclada ( Mont.) Falk. Critical examination of
the material mentioned above reveals clearly that
the method of growth at the apices is monopodial,
as suggested by Howe (1914, p.147) regarding the
material distributed in the copy of the phyc. Bor.

Amer. at the New York Botanical Garden. Undoubtedly
the material of that distribution is uniform. The
genus Streblocladia as originally described has
sympodial growth. The plants cannot, therefore, be
retained in that genus. They clearly belong to the
genus Polysiphonia and, so far as I am able to deter-
mine, to an undescribed species. All parts of the
plant are gradually attenuated upward, the apices
having numerous and very small hairs. The species
has four very large pericentral cells. The tetra-
sporangia are prominent and arranged in a spiral
fashion in the swollen, ultimate ramuli.

__GWt>h.31

JsOtype of
"?0vA A6oh‘\ natzx N.L (vAtoNss

\Jvvv. (Laut. Voiu..	1*4 * \00

_QoRhc.to	<200?-.

NEW YORK
BOTANICAL
garden

/

NEW YORK BOTANICAL GARDEN

00900573

Herbarium of the University op California

alg^ of California
Polysiphonia acuminata Gardner
tfhitefs Point, west of I3an Pedro
June 1908

ft. L. Gardner Mo. 1968

00900573