A favorite in my aromatherapy library is a book called Secretory Structures of Aromatic and Medicinal Plants by Katerina P. Svoboda and Tomas G. Svoboda. It is a rare find so I thought I would share some of the beautiful microscopic images it contains. The images are of various aromatic plants and their secretory glands. These glands contain the plants essential oils. In the case of eucalyptus, it is the cavities where the oil has been removed. Click on each image to enlarge.