Detail of the calyx surface of peppermint (Mentha x piperita L., Lamiaceae), showing yellow rounded sessile secretory glands and pointed non-secretory trichomes (Cryo-SEM magnified 742 times actual size). Photo © Microscopix photolibrary

from the book "Secretory Structures Of Aromatic And Medicinal Plants: A Review And Atlas Of Micrographs" by Katerina Svoboda and Tomas Svoboda, micrographs by Andrew Syred. To pucrchase this book, please click here.