Polysiphonia echinata 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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Polysiphonia echinata Harv. Ner. 3or.-Am. 2: 38. pi, 18 G. 1853.
#rond setaceous, rigid, dichotomous; branches distant, widely
spreading, or divaricate, not much attenuated, articulate, four-tubed, be-
set on all sides with minute spinelike, horizontal, subulate, simple or bi-
fid ramuli, internodes shorter^ than their breadth.

Hab. Key “est, W. H. H. (22). (v.v.)

Fronds three or four inches long or more, as thick as hog's bris-
tle or somewhat thicker, subdichotomously divided; all the divisions spread-
ing at very wide angles* The forkings are from half an inch apart, the ter-
minal branchlets generally an inch in length. All the younger parts, at
least, are beset at intervals of half a line with minute spinelike ramuli,
half a line in length, directed toward all sides, and issuing nearly at rigtt
angles with the branch. The articulations are visible in all parts of the
stem and oranches, uniformly shorter than their breadth, with very wide tubes,
and swollen dissepiments. The substance is tough and rigid, the membrane of
the walls thick, and not readily recovering shape after having been dried.
Colour a dark brown. It imperfectly adheres to paper.

This resembles P. fracta in its ramification, but is much more ro-
bust, and the ramyli are more copious, shorter, more compound, and more
equally inserted on all sides of the branches.

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