Periwinkle (<I>Catharanthus roseus</I>) (IMAGE) University of Kentucky Caption Periwinkle (Catharanthus roseus) is a source of potent chemotherapeutic drugs and a common horticultural plant found around the world. Credit Photo courtesy of David K. Liscombe Usage Restrictions Photo may be used by media License Licensed content 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.