Oregon Grape (image) Helmholtz Centre for Environmental Research - UFZ Share Print E-Mail Caption The Oregon grape (Mahonia aquifolium) is from western North America and came to Europe as an ornamental shrub. Since then it spreads like invasion. Credit Photo: André Künzelmann/ UFZ Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.