A. hydrillicola (IMAGE) Martin-Luther-Universität Halle-Wittenberg Caption Bacterial colonies of the cyanobacterium A. hydrillicola growing on a leaf of the invasive aquatic plant H. verticillata. Credit Susan Wilde Usage Restrictions Use with credit 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.