Lush green mountainside covered in a smoky fog. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3292255/free-photo-image-cc0-cloud-pictures-images-countrysideFree Image from public domain licenseEvergreen oak (Quercus ilex) from Traité des Arbres et Arbustes que l’on cultive en France en pleine terre… https://www.rawpixel.com/image/569564/evergreen-oak-branchFree Image from public domain licenseTrue cinnamon tree (Laurus cinnamomum) illustration. Digitally enhanced from our own book, Medical Botany (1836) by John… https://www.rawpixel.com/image/326954/free-illustration-image-cinnamon-ceylon-cinnamon-hand-drawnFree Image from public domain license