Trifolium saxatile (image) University of Vienna Caption This shows an endangered species: Trifolium saxatile, a type of clover. Credit Copyright: Stefan Dullinger Usage Restrictions The image may only be used with appropriate caption or credit. 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.