Anabaena propinqua Setch. & N.L.Gardner

• Region

  North America

• Country

  United States of America

• State/Province

  California

• County/Municipio

  Alameda Co.

• City/Township

  Berkeley

• Locality

  salt marsh

• Coordinates

  37.8761, -122.283

• Coordinate Uncertainty (m)

  5071.57

• Georeferencing Method

  Georeferencing Quick Reference Guide, Version 2012. Located coordinates of geogr. center of Berkeley. Measured from coord. to farthest extent of the city to find linear extent (5060 m). Used MaNIS Georef. Calculator to find uncertainty (Bounded Area).

• Geodetic Datum

  WGS84

• Distribution

  Map all specimens of this taxon

Anabasna propinqua Setchell & Gardner, sp.nov.

Univ. Cai if. Pubi. Bo t	487 .pi .42, f .1,4 Ja 1919.

new york
botanical

GARO ~/y

Strato tenuissimo, laete coeruleo-viridi,; tricho-
matibus flexuosis, 2.6-3 u diam. , vaginis distinctis;
cellulis subquadratis, 1.13-3 p. longis, cylindricis, ad
dissepimenta conspioua leviter constrictis; cellulis
terminalibus obtusis aut aoute conicis; heterocystis
subsphaeriois aut cylindricis, 3.5-4.5 u crassis, 5-7 y
longis; sporis subsphaericis aut late ellipticis, 5.5-’

7	p. crassis, 7-9 u longis, catenatis, ab heterocystis
remotis evolutione centrifuga, membrana externa levi,
hyalina.

Stratum very thin, light blue-green; trichomes
flexuous, 2.6-3 ji diam.,with a distinct sheath; cells
subquadrate, 1.8-3 ]x long, cylindrical, slightly con-
stricted at the dissepiments which are very distinct;
terminal cells varying from blunt to acute conical;
heterocysts subspherical to cylindrical, 3.5-4.5 yi diam.,
5-7 u long; spores subspherical to broadly ellipsoidal,
5.5-7 p. diam. ,7-9 u long, catenate, remote from the heter-
ooysts, developing' centrifugally, membrane smooth, hyaline.

Forming a thin stratum, more or less continuous, on
Ruppia maritima. In pools in a salt marsh, West Berkeley,
California. Type no. 1423, Gardner.

Anabaena variabilis Collins, Holden and Setchell,

Phyc. Bor.-Amer. (Sxsicc.), no. 1209.

Anabaena propinqua appears to be closely related to
A. variabilis Kuetz., but comparison with authentic mater-
ial of that species, from the herbarium of Thuret contri-
buted by Dr. Bornet (Herb. Univ. Calif, no. 100300) shows
sufficient differences to warrant the establishment of a
new species to receive our plant. It differs from A, varia
bilis Kuetz. in the smaller dimensions of all parts of the
plant, vegetative cells, heterocysts and spores, which are
also more nearly spherical than in A, variabilis and have
hyaline walls instead of brown as in that species.

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