Mahonia aquifolium (Pursh, 1814) Nuttall, 1818 - Oregon Grape Mt. Pisgah Arboretum, Lane Co., OR, July 10, 2013 © Donald H. Gudehus

Mahonia aquifolium (Pursh, 1814) Nuttall, 1818 - Oregon Grape Mirror Pond, Eugene, Lane Co., OR, June 14, 2014 © Donald H. Gudehus

Mahonia aquifolium (Pursh, 1814) Nuttall, 1818 - Oregon Grape Mirror Pond, Eugene, Lane Co., OR, June 15, 2014 © Donald H. Gudehus