Petrocelis franciscana Setch. & N.L.Gardner

  • Filed As

    Phyllophoraceae
    Petrocelis franciscana Setch. & N.L.Gardner

  • Collector(s)

    W. A. Setchell s.n., 20 Dec 1898

  • Location

    United States of America. California. San Francisco Co. San Francisco. Land's End, forming thick reddish-brown to black, orbicular or decidedly irregular patches on rocks near high water mark.

  • Identifiers

    NY Barcode: 02184967

    Occurrence ID: 57bd7eed-b51f-4fe4-ae76-695e314389ff

  • Exsiccatae

    Phycotheca Boreali-Americana, a collection of dried specimens of the Algae of North America

    Exsiccatae Number: 900

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  • Region

    North America

  • Country

    United States of America

  • State/Province

    California

  • County/Municipio

    San Francisco Co.

  • City/Township

    San Francisco

  • Locality

    Land's End, forming thick reddish-brown to black, orbicular or decidedly irregular patches on rocks near high water mark

  • 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

900. Petrocelis Middendorfii <RuPr
Kjellman, Algae of the Arctic Sea, p. 140, 1883 ; Bot. Centralblatt,
Vol. XLI, p. 168, 1890.
Cruoria Middendorfii Ruprecht, Tange Ochotsk. p. 329, 1851.
Petrocelis cruenta Farlow, Proc. Amer. Acad., Vol. XII, p. 239,
1877, in part.
Anderson, Zoe, Vol. IT, p. 221, 1891.
Howe, Erythea, Vol. I, p. 67, 1893.
Tilden, American Algae, No. 202, 1897.
Forming thick, reddish-brown to black, orbicular or decidedly
irregular patches on rocks near high water mark, Land?s End, San
Francisco, California, Dec. 20, 1898.
W. A. SETCHELL.
This species is certainly different from P. cruenta J. Ag., and
seems to agree with the scanty description of Ruprecht. It is rather
uncommon to find the tetraspores in any considerable quantity,
though unripe tetrasporangia are fairly common.
W. A. S.
02184967