Derby Boab Tree Up Close (image) University of Adelaide Share Print E-Mail Caption Close up of the so-called "prison tree," a boab tree near Derby, Western Australia. Credit Dr. Elizabeth Grant. Usage Restrictions None 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.