Arthrospira breviarticulata Setch. & N.L.Gardner

• Region

  North America

• Country

  United States of America

• State/Province

  California

• County/Municipio

  San Francisco Co.

• City/Township

  San Francisco

• Locality

  Lands End

• Coordinates

  37.7833, -122.502

• Coordinate Uncertainty (m)

  1441.57

• Georeferencing Method

  Georeferencing Quick Reference Guide, Version 2012. Located coordinates of geogr. center of Land's End. Measured from coord. to farthest extent of the park to find linear extent (1430 m). Input info. into MaNIS Georef. Calc. to find uncert. rad. (Bounded Area).

• Geodetic Datum

  WGS84

• Distribution

  Map all specimens of this taxon

UNIV. CALIF. PUBL. BOT. VOL, 6

[GARDNER] PLATE 41

NEW YORK

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PLATE 41

Arthrospira breviarticulata Setchell and Gardner

Pig. 26. An individual showing the general characters of a plant taken
at random.

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Arthrospira bre vi arti cui eta Setchell & Gardner, sp. nov.
Univ.Calif.Publ.Bot. 6:466.pl.39. f .18.pl.41.f.26. 3 D 1918

Trichomatibus in spiram plus minusve regularem laxissime
contortis, maxime et varie plus minusve dense implicatis, ^.fi-
le u diam.,comparate brevibus, leviter, torulosis, non ad termin-
os attenuatis; cellulis 2.5-3.5 y. longis; cytioplasmate dilute
chalybeo, granulas leviter angulatas, paucas et late disseminatas
praebente; parietibus tenuibus, distinct is; cellula terminal!
maxime convexa, membrana superne non incrassata.

Trichomes very loosely twisted into a more or less regular
spiral, and much knotted and contorted, 14.5-16 p. diam., com-
paratively short, slightly torulose, not tapering at the apices;
cells 2.5-3.5 }i long; protoplast pale steel-blue, with few scatter-
gel somewhat angular granules; cell walls thin, distinct, terminal
cell very convex, outer wall not thickened.

Growing on rocks and among Cladophora trichotoma (Ag.) Kuetz.
in tide pools along high-tide level. Lands End, San Francisco,
California. Type no. 1634, Gardner.

Arthrospira breviarticulata is distinguished from all other
soacies of the genus by its much greater length, and greater dia-
meter, by its being loosely coiled, and by its relatively much
shorter cells.

Arthrospira breviarticulata,Setchell & Gardner, sp.nov.
Univ.Calif.Pubi.Bot.6:466. pl.39.f.18.pl.4l.f.26.3 D 1918.

Trichomatibus in spiram plus minusve regularem
laxissime contortis, maxime et varie plus minusve
dense implicatis, l4.5-l6u diam., comparate brevibus,
leviter, torulosis, non ad terminos attenuatis; cell-
ulis 2.5-3«5u longis; cytioplasmate dilute chalybeo,
granulas leviter angulatas, paucas et late disseminat-
as praebente; parietibus tenuibus, distinctis; oellula
terminali maxime convexa, membrana superne non in—
crassata.

Trichomes very loosely twisted into a more or
less regular spiral, and much knotted and contorted,
l4.5-l6u diam., comparatively short,slightly torulose,
not tapering at the apices; cells 2.5-3.5u long; pro-
toplast pale steel-blue, with few scattered, somewhat
angular granules; cell walls thin, distinct, terminal
cell very convex,outer wall not thickened.

Growing on rocks and among Cladophora trichotoma
(Ag.) Kuetz. in tide pools along high-tide level. Lands
End, San Francisco, California. Type no. 1634, Gardner.

Arthrospira breviarticulata is distinguished from
all other species of the genus by its much/ greater
length, and greater diameter, by its being loosely
coiled,and by its relatively much shorter cells.

Arthrospira breviarticulata Setchell and Gardner

Fig. 18. An individual showing the loose spiral, doubled and entwined
upon itself.

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