Parasitic Plants Controlling Weeds (image) University of Adelaide Share Print E-Mail Caption Cassytha haustoria on Leptospermum (native tea-tree). Credit By David Hollingworth. Usage Restrictions For use with this story 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.