Herposiphonia rigida N.L.Gardner

• Region

  North America

• Country

  United States of America

• State/Province

  California

• Locality

  Cypress Pt., Monterey Peninsula

• Coordinates

  36.5803, -121.975

• Coordinate Uncertainty (m)

  458.569

• Georeferencing Method

  Georeferencing Quick Reference Guide, Version 2012. Located coordinates of approx. geogr. center of Cypress Point. Measured from coord. to farthest extent of the point with overest. to find linear extent (447 m). Input info. into MaNIS Georef. Calc. to find uncert. rad. (Bounded Area).

• Geodetic Datum

  WGS84

• Distribution

  Map all specimens of this taxon

mie AL
ZDEH
Herposiphonia rigida Gardner, sp.nov.
Univ.Oalif.Pubi.Bot.l4:100.pl.23. f.1-2. 7 D 1927.
Fronds composed of a relatively extensive system of
creeping filaments attached on the under side by numerous
rhizoidal filaments and giving rise to numerous alternate,
erect ?branches* erect fronds 1-2.5 cm. high, with a oentral
percurrent axis about 250ji diam, and composed of ?-11 peri-
central cells about 2-3 times as long as their diameter,
giving rise to two kinds of branches, viz.,2 (sometimes 3)
orders of branches similar to the main axes, each order re-
duced in size; and umbranched, rigid, subulate, alternate,
slightly attenuated, blunt ramuli about 1.25 mm. long,aris-
ing from every node except those occupied by the large
branches, and standing at an angle of about 70ř; branches
and ramuli both distichous; 3 ramuli intervening the branches
of each order, these orders being regularly alternate; ramuli
more or less twisted; all parts of the frond relatively ri?i.a;
color very dark on drying; tetrasporangia in a single series
in the ramuli, relatively sparse; cystocarps relatively large,
slightly urceolate, sessile near the base on the adaxial side
of the ramulus; cystocarps and antheridia unknown.
Growing on filamentous Corallines, etc.,in the upper sub-
littoral belt. Friday Harbor, Washington, to Santa Monica,
California. Type, Gardner, no. 6023 (Herb. Univ. Calif, no.
276868), dredged in the vicinity of Friday Harbor. July*
In the character of the method of branching, this species
of Herposiphonia is almost identical with H. grandis Kylin
but the prostrate portion of the frond is more extensive and
the erect portion less extensive than in Zylin?s species from
the same general locality. Also the fronds are much more rigid
and are almost black on drying, H. grandis being more flaccid
and a dark red or brownish red on drying, in each species the
main branches of all orders are alternate and distichous and
are separated regularly on eaeh side by three subulate ramuli.
DUDLEY HERBARIUM OF STANFORD UNIVERSITY
Plants of California
Herposiphonia rigida (Jardn.
41-315
On rocks in deeply shaded tide pool at
- ho foot tide level.
NB.?/ YOU*
HX&TA HICA-L
mARDEN
Cypress Pt.,
Monterey Peninsula, Calif<
7/9/41
G-.M. Smith
coll. St det.
Aleae distributed from the Herbarium of the	ţ
University ol California	NEW YOR#
botanical
Herposiphonia rigida Gardner garden
Carmel Bay, California
May 1916
3J. L. Gardner. Ho. 3365
MARINE ALGAE OF CALIFORNIA
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cvj
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_Herposiphonia rigida var laxa S.&G.
Locality:Santa Catalina Island
Habitat: Rocky shore in vicinity of Avalon
Collected by E. Yale Dawson 3/23?24/1948 No. 4$
det. by E.Y.D,
ALGAE
DISTRIBUTED BY THE ALLAN HANCOCK FOUNDATION
THE UNIVERSITY OF SOUTHERN CALIFORNIA
NEW
botal
GAF
02213951
02213950
02213952