Ten Quercus species compared through exact Wikimedia Commons photographs of crowns, foliage and bark. An editorial selection, not a scientific ranking. Photograph credits: 1. File:Quercus robur.jpg; MPF (English Wikipedia); CC BY-SA 3.0; http://creativecommons.org/licenses/by-sa/3.0/; https://commons.wikimedia.org/wiki/File:Quercus_robur.jpg; Whole-image fit and scaling; title and caption bars added. Photograph licensed under the stated source licence. 2. File:Quercus petraea 06.jpg; Willow; CC BY 2.5; https://creativecommons.org/licenses/by/2.5; https://commons.wikimedia.org/wiki/File:Quercus_petraea_06.jpg; Whole-image fit and scaling; title and caption bars added. Photograph licensed under the stated source licence. 3. File:Keeler Oak Tree - distance photo, May 2013.jpg; Marty Aligata at English Wikipedia; CC BY-SA 3.0; https://creativecommons.org/licenses/by-sa/3.0; https://commons.wikimedia.org/wiki/File:Keeler_Oak_Tree_-_distance_photo,_May_2013.jpg; Whole-image fit and scaling; title and caption bars added. Photograph licensed under the stated source licence. 4. File:Quercus rubra @ Tortworth Court.jpg; No machine-readable author provided. Velela assumed (based on copyright claims).; Public domain; ; https://commons.wikimedia.org/wiki/File:Quercus_rubra_@_Tortworth_Court.jpg; Whole-image fit and scaling; title and caption bars added. Photograph licensed under the stated source licence. 5. File:Pin oak quercus palustris.jpg; Bruce Marlin; CC BY-SA 2.5; https://creativecommons.org/licenses/by-sa/2.5; https://commons.wikimedia.org/wiki/File:Pin_oak_quercus_palustris.jpg; Whole-image fit and scaling; title and caption bars added. Photograph licensed under the stated source licence. 6. File:2014-11-02 14 15 16 Scarlet Oak foliage during autumn on Hunters Ridge Drive in Hopewell Township, New Jersey.jpg; Famartin; CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0; https://commons.wikimedia.org/wiki/File:2014-11-02_14_15_16_Scarlet_Oak_foliage_during_autumn_on_Hunters_Ridge_Drive_in_Hopewell_Township,_New_Jersey.jpg; Whole-image fit and scaling; title and caption bars added. Photograph licensed under the stated source licence. 7. File:Quercus ilex JPG1.jpg; Jean-Pol GRANDMONT; CC BY 3.0; https://creativecommons.org/licenses/by/3.0; https://commons.wikimedia.org/wiki/File:Quercus_ilex_JPG1.jpg; Whole-image fit and scaling; title and caption bars added. Photograph licensed under the stated source licence. 8. File:Cork oak (28864190188).jpg; Kent Wang from London, United Kingdom; CC BY-SA 2.0; https://creativecommons.org/licenses/by-sa/2.0; https://commons.wikimedia.org/wiki/File:Cork_oak_(28864190188).jpg; Whole-image fit and scaling; title and caption bars added. Photograph licensed under the stated source licence. 9. File:Quercus lobata Mount Diablo near North Gate Road 1.jpg; Awinch1001; CC BY 4.0; https://creativecommons.org/licenses/by/4.0; https://commons.wikimedia.org/wiki/File:Quercus_lobata_Mount_Diablo_near_North_Gate_Road_1.jpg; Whole-image fit and scaling; title and caption bars added. Photograph licensed under the stated source licence. 10. File:FL Volusia Oak03.jpg; Ebyabe; CC BY 2.5; https://creativecommons.org/licenses/by/2.5; https://commons.wikimedia.org/wiki/File:FL_Volusia_Oak03.jpg; Whole-image fit and scaling; title and caption bars added. Photograph licensed under the stated source licence.