Rhodymenia pertusa (Postels & Rupr.) J.Agardh
Annotated by Robert F. Scagel.

Washington: San Juan: At the south end of Shaw Island, near Canoe Island.
48.566667° N, 122.916667° W,
Coordinate Source: Specimen Label.
On rocks in the upper subtidal zone to a depth of 5 fathoms.; rock. HerbariumSpecimenDuplicate: Rhodymenia pertusa | herbariumSpecimenDuplicate: Rhodymenia pertusa Thallus erect, flattened, blade-like from 0.5-1.5 m. high when mature and perforated with numerous holes; with a short terete to slightly flattened stipe arising from a discoid holdfast. Frequently with several blades arising from the same holdfast. Colour a rose red to brownish red.
12. Https://oregonflora.org/collections/individual/index.php?occid=4682888.

Robert F. Scagel 15, 1955-6-27
OSC, Catalog: OSC-A-012102