Sisyrinchium idahoense E.P. Bicknell var. occidentale (E.P. Bicknell) Douglass M. Hend. × Sisyrinchium idahoense Bicknell var. segetum (Bicknell) D. Hend.

Washington: Thurston County: Rocky Prairie.
46.89722° N, 122.86278° W,
Datum: WGS 84. Uncertainty: 10000 meters. Coordinate Source: GeoLocate.
Stems 1.3-2.0 mm wide; tepals 15 mm long. Phenology: Fertile.

I. C. Otis 1897, May 12, 1934
WTU, Accession: 13978JWT