Original identification: Berberis aquifolium
Current identification: Mahonia aquifolium
Photographer: Ron Bockelman
Date Photographed: April 24, 2015
Location: U.S.A., Washington, Kittitas County: Wild Horse Wind Facility (Puget Sound Energy).
Elevation: 3415 ft.
Coordinates: 47.06186° N, 120.22847° W
Comments: Penknife is 6 cm long.
Voucher Specimen: Ron Bockelman 15-17, WTU Herbarium