Rhododendron ponticum (image) Pensoft Publishers Caption Rhododendron ponticum, rhododendron, is a serious economic invader in Britain, now starting to spread in other parts of Europe. Here all the purple flowers are rhododendron, covering a hillside in the Snowdonia National Park, Wales. Derived by selection and hybridization from a native plant of southern Spain. Credit Williamson M, Meyerson LA, Auge H Usage Restrictions None 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.