Bacterial Cultures Form Flower Patterns (image) University of California - San Diego Share Print E-Mail Caption E. coli and A. baylyi form intricate flower-like patterns when grown together over a 24-hr. period. Credit BioCircuits Institute/UC San Diego Usage Restrictions Please credit BioCircuits Institute/UC San Diego 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.