Petrocelis middendorfii (Rupr.) Kjellm.

• 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

•.^¿rrssaasssa:
PHYCOTHECA BOREALI-ANIERICANA. COLLINS, HOLDEN, AND'SETCHELL.
900. Petrocelis Middendorfii (Rupr.) Kjellm.
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, Froc. Amer. Acad., Vol. XII, p. 239,
1877, in part.
Anderson, Zoe, Vol. II, p. 221, 1891.
Howe, Erythea, Vol. I, p. 67, 1893.
Tiklen, American Algae, No. 202, 1897.
Forming thick, reddish-brown to black, orbicular or decidedly
irregular patches on rocks near high water mark, L/and 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.
NEW YORK BOTANICAL GARDEN
02348706
02348706