Oxford Ragwort (IMAGE) Norwich BioScience Institutes Caption The head of an Oxford Ragwort (S. squalidus) superimposed on Oxford. Credit John Innes Centre 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.