Ahnfeltia plicata (Huds.) E.M. Fr.
Annotated by Robert F. Scagel. Remarks: SYN.: Fucus plicatus Hudson, 1762, p. 470; Gymnogongrus plicatus Kützing, 1849, p. 789; Sterrocolax decipiens Schmitz, 1893a, p. 397.

Washington: San Juan County: Goose Island, at the south entrance to San Juan Channel.
48° 27' N, 122° 57' W
On rocks in the lower intertidal and upper subtidal zones, frequently with the lower portion buried in sand. 3. Thallus dark reddish purple to purplish black, with erect, wiry branches repeatedly and dichotomously branched. Branches terete. Thallus 5-10 cm. high.

Robert F. Scagel 2, Jun 21, 1955
WTU, Accession: 245346, Barcode: WTU-A-004256