Ten Rudbeckia species compared through exact Wikimedia Commons photographs of flowers and foliage. An editorial selection, not a scientific ranking. Original video contributions: CC BY-SA 4.0. Individual photographs retain the licences and credits listed in attribution; public-domain and CC0 photographs remain so. Photograph credits: 1. File:Rudbeckia hirta kz03.jpg; Krzysztof Ziarnek, Kenraiz; CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0; https://commons.wikimedia.org/wiki/File%3ARudbeckia_hirta_kz03.jpg; Whole-image fit and scaling; title and caption bars added. Photograph licensed under the stated source licence. 2. File:Rudbeckia fulgida.JPG; Jerzy Opioła (Poland); CC BY-SA 3.0; http://creativecommons.org/licenses/by-sa/3.0/; https://commons.wikimedia.org/wiki/File%3ARudbeckia_fulgida.JPG; Whole-image fit and scaling; title and caption bars added. Photograph licensed under the stated source licence. 3. File:Oohangousou.JPG; Σ64; CC BY-SA 3.0; http://creativecommons.org/licenses/by-sa/3.0/; https://commons.wikimedia.org/wiki/File%3AOohangousou.JPG; Whole-image fit and scaling; title and caption bars added. Photograph licensed under the stated source licence. 4. File:Rudbeckia triloba2.JPG; b:User:SBJohnny; Public domain; ; https://commons.wikimedia.org/wiki/File%3ARudbeckia_triloba2.JPG; Whole-image fit and scaling; title and caption bars added. Photograph licensed under the stated source licence. 5. File:Rudbeckia maxima.jpg; Eric Hunt; CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0; https://commons.wikimedia.org/wiki/File%3ARudbeckia_maxima.jpg; Whole-image fit and scaling; title and caption bars added. Photograph licensed under the stated source licence. 6. File:Rudbeckia occidentalis 3627.JPG; Walter Siegmund (talk); CC BY-SA 3.0; https://creativecommons.org/licenses/by-sa/3.0; https://commons.wikimedia.org/wiki/File%3ARudbeckia_occidentalis_3627.JPG; Whole-image fit and scaling; title and caption bars added. Photograph licensed under the stated source licence. 7. File:Rudbeckia subtomentosa 01.JPG; AfroBrazilian : Aleksandrs Balodis; CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0; https://commons.wikimedia.org/wiki/File%3ARudbeckia_subtomentosa_01.JPG; Whole-image fit and scaling; title and caption bars added. Photograph licensed under the stated source licence. 8. File:Rudbeckia grandiflora var. alismifolia.jpg; Eric Hunt; CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0; https://commons.wikimedia.org/wiki/File%3ARudbeckia_grandiflora_var._alismifolia.jpg; Whole-image fit and scaling; title and caption bars added. Photograph licensed under the stated source licence. 9. File:Rudbeckia missouriensis.jpg; Eric Hunt; CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0; https://commons.wikimedia.org/wiki/File%3ARudbeckia_missouriensis.jpg; Whole-image fit and scaling; title and caption bars added. Photograph licensed under the stated source licence. 10. File:Rudbeckia texana.jpg; Wikilouque; CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0; https://commons.wikimedia.org/wiki/File%3ARudbeckia_texana.jpg; Whole-image fit and scaling; title and caption bars added. Photograph licensed under the stated source licence.