Antithamnion tenuissimum (Hauck) Schiffner
Remarks: cf. Doty. Farlowia 3:190. 1947.

Oregon: Coos: Floating timer at Marshfield on Coos Bay.
43.381687° N, 124.214666° W,
Datum: WGS 84. Coordinate Source: Digital Map.
Https://oregonflora.org/collections/individual/index.php?occid=4686204.

J.C. Queen 106, [No collection year given.]
OSC, Catalog: OSC-A-013872