Blad van een eik (1853) by Alois Auer and k k Hof und Staatsdruckerei https://www.rawpixel.com/image/13735217/blad-van-een-eik-1853-alois-auer-and-hof-und-staatsdruckereiFree Image from public domain licenseNature Print of Moonwort and Adder's Tongue Ferns, plate 51 from The Ferns of Great Britain and Ireland by Henry Bradbury https://www.rawpixel.com/image/8974728/image-paper-flower-plantFree Image from public domain licenseOak (Quercus species): six leaves showing large variation in size. Colour nature print by A. Auer, c. 1853. https://www.rawpixel.com/image/13954064/image-plant-medicine-treeFree Image from public domain licenseLighting through the ages. Antiquity: 1. Prehistory. - 2-3. Egyptian - 4-5. Assyrian. 6-13. Roman. - 14-15. Carthaginian. -… https://www.rawpixel.com/image/7666537/image-light-art-vintageFree Image from public domain licenseFour rows of leaves of varying form, including some of holly (Ilex species) and willow (Salix species). Colour nature print… https://www.rawpixel.com/image/13964671/image-plant-grass-medicineFree Image from public domain licensePortret van Ludwig Auer in het toneelstuk 'Der heilige Florian' (1913 - 1915) by anonymous https://www.rawpixel.com/image/13733565/photo-image-face-hand-personFree Image from public domain licenseA group of lower plants, including mosses, liverworts and lichens. Colour nature print by A. Auer, c. 1853. https://www.rawpixel.com/image/13956551/image-plant-art-leafFree Image from public domain licenseTwo entire flowering plants, a yellow crocus (Crocus species) and a herb Paris (Paris quadrifolia). Colour nature print by… https://www.rawpixel.com/image/13966807/image-flower-plant-artFree Image from public domain licenseTwo flowering plants, including a daffodil (Narcissus species) and a liliaceous plant. Colour nature print by A. Auer, c.… https://www.rawpixel.com/image/13965619/image-flower-plant-grassFree Image from public domain licenseFour flowering plants, including a cowslip (Primula veris), comfrey (Symphytum officinale) and a bulrush (Scirpus species).… https://www.rawpixel.com/image/13953603/image-flower-plant-grassFree Image from public domain licenseThe male fern (Dryopteris filix-mas): fronds and part of rhizome. Colour nature print by A. Auer, c. 1853. https://www.rawpixel.com/image/13962052/image-plant-tree-artFree Image from public domain licenseFive plants, including a grass, a sedge and a plant of the Boraginaceae family. Colour nature print by A. Auer, c. 1853. https://www.rawpixel.com/image/13958170/image-flower-plant-grassFree Image from public domain licenseThree flowering plants, including common heather (Calluna vulgaris) and an orchid (Orchidaceae species). Colour nature print… https://www.rawpixel.com/image/13960397/image-flower-plant-grassFree Image from public domain licenseThree liliaceous flowering plants, including lily of the valley (Convallaria majalis) and whorled Solomon's seal… https://www.rawpixel.com/image/13992746/image-flower-plant-grassFree Image from public domain licenseA mass of filamentous green algae, possibly a Spirogyra species. Colour nature print by A. Auer, c. 1853. https://www.rawpixel.com/image/13972028/image-plants-person-artFree Image from public domain licenseGeschoten auerhoen (1855) by anonymous, Alois Auer and Matthias Johann Ranftl https://www.rawpixel.com/image/13759733/geschoten-auerhoen-1855-anonymous-alois-auer-and-matthias-johann-ranftlFree Image from public domain licenseA group of mosses, in eight separate clumps. Colour nature print by A. Auer, c. 1853. https://www.rawpixel.com/image/14009052/image-background-flower-plantFree Image from public domain licenseTwo different mosses: five clumps of which three have slender stalked sporophytes. Colour nature print by A. Auer, c. 1853. https://www.rawpixel.com/image/13975869/image-flower-plant-grassFree Image from public domain licenseMicroscopische opname van een insect (1853) by anonymous and Alois Auer https://www.rawpixel.com/image/13758442/microscopische-opname-van-een-insect-1853-anonymous-and-alois-auerFree Image from public domain licenseU.S. Air Force Col. Mark Auer, the commander of the 121st Air Refueling Wing, takes his final flight in a KC-135… https://www.rawpixel.com/image/8728210/photo-image-airplane-public-domainFree Image from public domain licenseFive flowering plants, including a sedge (Carex species) and stemless gentian (Gentiana acaulis). Colour nature print by A.… https://www.rawpixel.com/image/13984901/image-flower-plant-grassFree Image from public domain license