Therapeutice specialis ad febres periodicas perniciosas. https://www.rawpixel.com/image/14010060/therapeutice-specialis-febres-periodicas-perniciosasFree Image from public domain licenseUntitled, from the series "Skeleton Leaves" by John P. Soule https://www.rawpixel.com/image/9038804/untitled-from-the-series-skeleton-leaves-john-souleFree Image from public domain licenseLincoln, from the series "Skeleton Leaves" by John P. Soule https://www.rawpixel.com/image/8965846/lincoln-from-the-series-skeleton-leaves-john-souleFree Image from public domain licenseScolopendrium vulgare, British by Anna Atkins and Anne Dixon https://www.rawpixel.com/image/14248708/scolopendrium-vulgare-british-anna-atkins-and-anne-dixonFree Image from public domain licenseLadybug on Veronica flowers. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3370040/free-photo-image-anemone-animal-antherFree Image from public domain licenseA macro shot of dark-colored leaves.. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3301459/free-photo-image-crystal-cc0-creative-commonsFree Image from public domain licenseFive different Australian honeysuckle plants (Banksia species): flowering stems. Coloured lithograph. https://www.rawpixel.com/image/13963539/image-plant-art-leafFree Image from public domain licenseBelted KingfisherPhoto by Grayson Smith/USFWS. Original public domain image from Flickr https://www.rawpixel.com/image/4028394/photo-image-plant-leaf-birdFree Image from public domain licenseMonarch butterfly laying egg on a milkweed plantPhoto by Marci Lininger/USFWS. Original public domain image from Flickr https://www.rawpixel.com/image/4028240/photo-image-plant-leaf-butterflyFree Image from public domain licenseNorthern monkshood in bloomCheck out this northern monkshood in full bloom at Driftless Area National Wildlife Refuge.Photo… https://www.rawpixel.com/image/4028635/photo-image-flower-plant-leafFree Image from public domain licenseShaggy Mane MushroomThese interesting mushrooms have color changing gills that secrete a spore-filled inky liquid. Once they… https://www.rawpixel.com/image/4029196/photo-image-plant-leaf-autumnFree Image from public domain licenseEarly fall colors in the Adirondacks of northeastern New York, on October 12, 2019, Courtesy photo by Emily de Vinck.… https://www.rawpixel.com/image/3261745/free-photo-image-flare-ground-landFree Image from public domain licensePhipps Conservatory and Botanical Gardens, Pittsburgh, United States. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3292937/free-photo-image-arbour-bush-cc0Free Image from public domain licenseSucculents and potted plants on a patio garden. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3283933/free-photo-image-art-blossom-cc0Free Image from public domain licenseSkeletonized Alder Leaves found in the Applewhite Picnic Area in Lytle CreekForest Service photo by Tania C. Parra. Original… https://www.rawpixel.com/image/4030352/photo-image-plant-leafFree Image from public domain license