Penstemon pachyphyllus (image) American Journal of Botany Caption This is Penstemon pachyphyllus and a bumblebee. Credit Courtesy of Andrea Kramer, Chicago Botanic Garden. Usage Restrictions Cite original publication and credit line. 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.