Polysiphonia exilis Harv.

• Region

  North America

• Country

  United States of America

• State/Province

  Florida

• County/Municipio

  Monroe Co.

• City/Township

  Key West

• Coordinates

  24.5591, -81.7816

• Coordinate Uncertainty (m)

  3481.57

• Georeferencing Method

  Georeferencing Quick Reference Guide, Version 2012. Located coordinates of geogr. center of Key West. Measured from coord. to farthest extent of the key to find linear extent (3470 m). Used MaNIS Georef. Calculator to find uncertainty (Bounded Area).

• Geodetic Datum

  WGS84

• Distribution

  Map all specimens of this taxon

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Pol. exilis Harv.

Key West;

Collected by

W. H. H. (2k)

Polysiphonia exilis; Harv. Her. Bor.-Am. 2: 47. pi. 18G. 1853.

Filament densely tufted, creeping, afterwards ascending or sub-
erect, furnished with a few distant, seound, unequal, filiform ramuli; in-
ternodes shorter than their breadth in all parte of the frond; tubes nine-
tetraspores in the ramuli.	*

Hab. Key West, ST. H. H. (24) Dr. Blodgett, (v. v.)

Densely tufted. Filaments matted together at base and there at-
tached by lateral rooting fibres; afterwards ascending or sub-erect about
an inch in length or rather more, ultra-capillary, generally simple’ fur-
nished at short intervals with numerous very unequal, secund ramuli* long
and short often indiscriminately ranked together, the ends of the filane nts
generally bare. Internodes very short, about half as long as broad, with
pellucid dissepiments. A oross section shows nine tubes. Tetraspores in
distorted ramuli. I have not seen conceptacles. Colour a dark brown red
becoming much browner in drying. Substance coarse and rather rigid. It *
imperfectly adheres to paper in drying.

Allied to P. obscura, Ag.; but more robust, and yet with fewer
and broader tubes. I also collected at Key West one or two specimens of a
Polysiphonia nearly allied to this, differing in being robust, less branch-
ing, having longer internodes and a. rather brighter colour. As the speci-
mens are not in a very good state, I am unwilling to give them a name at
present, and thereby add to the sufficiently numerous list of bas species in
this genus.

I

00900563