Polystichum munitum (Kaulf.) Presl × Polystichum scopulinum (D.C. Eaton) Maxon
Annotated by D. Wagner, 1976. Remarks: Indusia are ciliate, and the rachis is abnormally chaffy. This should show little pairing at meiosis. (This hybrid has not been cytologically proven).

Washington: Kittitas County: Between Paris Creek and Boulder Creek, upper Cle Elum River valley. On benches above river and road.
47.198258° N, 120.4389° W,
Datum: WGS 84. Uncertainty: 10000 meters. Coordinate Source: GeoLocate.
On wooded alluvial benches; mixed parent material, thouh predominantly ultramafic rock. Hybrid population. Specimen also mounted with 5639 b-d. P. munitum, vel aff. P. scopulinum (meiosis irregular and non-staining spores). Phenology: Spores.

A. R. Kruckeberg 5639a, Jul 12, 1963
WTU, Accession: 214838A, Barcode: WTU-V-030955