Mesquite herbarium specimen (IMAGE) Florida Museum of Natural History Caption Mesquite plants, such as this specimen of Prosopis velutina, are common components of desert floras, due in part to their symbiotic relationship with bacteria that enable them to access atmospheric nitrogen. Credit Florida Museum of Natural History Usage Restrictions Credit must be given to the creator. License CC BY 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.