Polyneura latissima (Harv.) Kylin
Annotated by Robert F. Scagel.

Washington: San Juan County: Salmon Bank, south end of San Juan Island
48° 26' N, 123° 1' W
Coordinate Source: Specimen Label.
Growing on rocks, worm tubes and old wood in the lower intertidal and subtidal zones to a depth of 10 fathoms. Thallus flattened, up to 35 cm. high, rose red in colour, stipitate, ovate to broadly obcuneate, usually undivided but frequently lacerated.¶47 Substrate: rock. worm tubes, wood.

Robert F. Scagel 80, Jun 25, 1958
OSC, Barcode: OSC-A-011832