Coilodesme californica (Rupr.) Kjellm.
Annotated by Robert F. Scagel.

Washington: San Juan County: Goose Island, at the south entrance to San Juan Channel
48° 27' N, 122° 57' W
Coordinate Source: Specimen Label.
Growing epiphytically on Cystoseira geminata in the lower intertidal and upper subtidal zones. Thallus up to 30cm. high; a linear or obovate flattened sac with a short cylindrical stipe; attached by a small discoid holdfast; light brown in colour. ¶36 Substrate: epiphytic.

Robert F. Scagel 12, Jun 21, 1955
OSC, Barcode: OSC-A-010881