Mahonia (1 of 2) (IMAGE) Helmholtz Association Caption The Oregon grape originates from the West of the USA. In Oregon, the evergreen bush is even the official plant of the US Federal State and is therefore also known as "Oregon grape." But now it grows also in Europe. Credit Photo: André Künzelmann/UFZ Usage Restrictions None License Licensed content 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.