Postelsia palmaeformis Rupr.

Washington: Clallam County: Waadah Island, Neah Bay
48.382198° N, 124.597974° W,
Datum: WGS 84. Uncertainty: 567 meters. Coordinate Source: Digital Map.
On rocks in the middle and lower inter-tidal zones in areas exposed to heavy surf. Description: Thallus erect, up to 45 cm. high, growing in dense stands. Thallus comprising a stout hollow stipe attached by a holdfast of short branched haptera and bearing numerous longitudinally furrowed blades at the apex. Colour olive brown. Substrate: rock.

Robert F. Scagel 39, Jul 18, 1955
OSC, Accession: 9992, Barcode: OSC-A-003044, 23