Phormidium crosbyanum Tilden

• Region

  Oceania

• Country

  United States of America

• State/Province

  Hawaii

• Locality

  Oahu, Waianae, forming reddish-brown, flattened-globose cushions on upper side of rock shelf, between tides

• Coordinates

  21.4503, -158.173

• Coordinate Uncertainty (m)

  2821.57

• Georeferencing Method

  Georeferencing Quick Reference Guide, Version 2012. Located coordinates of geogr. center of Waianae. Measured from coord. to farthest extent of the place to find linear extent (2810 m). Used MaNIS Georef. Calculator to find uncertainty (Bounded Area).

• Geodetic Datum

  WGS84

• Distribution

  Map all specimens of this taxon

NEW YORK BOTANICAL GARDEN
02348128
Josephine E. Tilden. American Algae.
644* Phormidium valderianum (Delp.) Gomont. Monogr. Oscillariees. 167.
pi. 4. f. 20. 1892.
Plant mass slimy, expanded, lamellose, 8 mm. thick, the upper layers dull green, the
internal layers whitish; trichomes 2-2.5 mic. in diameter, blue-green, straight, not
attenuate at apex, not constricted at joints; cells 3.3-67 mic in length; apical cell
rotund; calyptra none.
Laguna, Lake Amatitlan. Altitude 3,950 feet. Guatemala, Central America.
Coll. W. A. Kellerman (no. 4304), 8 F 1905.
Plant mass 2 cm. in thickness, 5 cm. in diameter, bluish-green to brownish-red in color,
impregnated with lime, firm, somewhat hard; filaments curved, intricate or arranged
parallel with each other; sheaths extremely delicate; trichomes 1-2 mic. in diameter,
not constricted at joints, with straight apex, neither attenuate nor capitate; cells 1.5-5
mic. in length; apical cell conical; calyptra none.
Forming reddish-brown; flattened-globose cushions on upper side of rock shelf, between
tides.	'“•>
Waianae, Oahu, Hawaiian Islands.
J. E. T. 21 May 1900.
It is usually very difficult to make out the sheaths protuding beyond the trichome, but
empty sheaths are numerous.
02348128
02348129