Epilobium hornemannii Reichenb. ssp. hornemannii × Epilobium luteum Pursh ?
Annotated by Peter C. Hoch, 1981. Remarks: Hybrid. Missouri Botanical Garden Herbarium (MO).

Washington: Wodan Valley. Mount Paddo (Adams).
46.167962° N, 121.436474° W,
Datum: WGS 84. Uncertainty: 1470 meters. Coordinate Source: Digital Map.
In and by streamlets on steep sunny slope. Phenology: Flowers & Fruits. Isolectotype: Epilobium pulchrum Suksd.. Published 1927. Werdenda 1: 26.

Wilhelm Suksdorf 5741, Jul 26, 1906
WTU, Accession: 2368JWT, Barcode: WTU-V-000726