Polysiphonia fracta 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

6 7 8 9 10 T TVT V

The New York

copyright reserved botanical Garden

Polysiphonia fracta Harv. lie r. Bor .-Am. 2: 58. pi. 18 G. 1853.

filaments irregularly tufted or bundled together, capillary,
rather rigid, divaricately much branched, subdichotomous; branches distant,
spreading at wide angles, beset with scattered, spinelike, horizontal short
ramuli; internodes four-tubed, about equal in length and breadth in all
parts of the frond.

Hab. Key West, W. H. H. (18), Dr. Blodgett (42). (v.v.)

This forms loose, squarrose tufts or bundles. The filaments are
rather coarser than human hoar, gradually but not greatly attenuated up-
wards, and irregularly much branched, the main stems dividing subdichot-
omously. The forkings are distant and spreading, irregularly subdivided.
All the branches issue at wide angles, and the larger ones are furnished
with numerous, scattered, horizontally patent, thornlike ramuli about a
line in length. The substance is rather rigid. Colour a reddish brown.
Stem square, four-tubed, and dissepiments pellucid in all parts of the
frond. It imperfectly adheres to paper in drying.

This has the aspect of P. subulifera, but a very different struc-
ture. In the characters of the internodes it agrees with P. breviarticu-
lata. but differs in the more slender frond and the disposition of the
branches and ramuli. Dr. Blodgett*s specimen is more flaccid than those I
collected in February, more densely branched, with the apice fibrillifer-
ous, characters probably dependant on the state of development.

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Collected by

Feb., 1850 (18)

PHOTO	HERBARIUM DF

THE NEW YORK BDTANICAL GARDEN

ALGAE OF FLORIDA, USA
Pol. fracta. Harv.

Key West,

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00900569