Ten Carduus species and their distinctive flower head forms. Exact photographs in an editorial sequence, not a scientific ranking. Individual photographs retain the source licences listed in attribution. Original editorial video contributions licensed CC BY-SA 4.0. Photograph credits: 1. File:Carduus Nutans in the Carpathian Mountains.jpg; Andreiflorea993; CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0; https://commons.wikimedia.org/wiki/File:Carduus_Nutans_in_the_Carpathian_Mountains.jpg; Photograph fitted to portrait canvas with editorial title panels; scene 8 uses a reviewed subject-preserving crop. 2. File:20140209Carduus acanthoides.jpg; AnRo0002; CC0; http://creativecommons.org/publicdomain/zero/1.0/deed.en; https://commons.wikimedia.org/wiki/File:20140209Carduus_acanthoides.jpg; Photograph fitted to portrait canvas with editorial title panels; scene 8 uses a reviewed subject-preserving crop. 3. File:Carduus crispus - Keila.jpg; Ivar Leidus; CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0; https://commons.wikimedia.org/wiki/File:Carduus_crispus_-_Keila.jpg; Photograph fitted to portrait canvas with editorial title panels; scene 8 uses a reviewed subject-preserving crop. 4. File:Carduus tenuiflorus 20190501a.jpg; Luis Fernández García; CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0; https://commons.wikimedia.org/wiki/File:Carduus_tenuiflorus_20190501a.jpg; Photograph fitted to portrait canvas with editorial title panels; scene 8 uses a reviewed subject-preserving crop. 5. File:Carduus pycnocephalus 2.jpg; Franz Xaver; CC BY-SA 3.0; https://creativecommons.org/licenses/by-sa/3.0; https://commons.wikimedia.org/wiki/File:Carduus_pycnocephalus_2.jpg; Photograph fitted to portrait canvas with editorial title panels; scene 8 uses a reviewed subject-preserving crop. 6. File:Carduus personata 1.jpg; Franz Xaver; CC BY-SA 3.0; https://creativecommons.org/licenses/by-sa/3.0; https://commons.wikimedia.org/wiki/File:Carduus_personata_1.jpg; Photograph fitted to portrait canvas with editorial title panels; scene 8 uses a reviewed subject-preserving crop. 7. File:Alpen-Distel.jpg; The original uploader was Tigerente at German Wikipedia .; CC BY-SA 3.0; http://creativecommons.org/licenses/by-sa/3.0/; https://commons.wikimedia.org/wiki/File:Alpen-Distel.jpg; Photograph fitted to portrait canvas with editorial title panels; scene 8 uses a reviewed subject-preserving crop. 8. File:C. carlinoides-1.jpg; Joan Simon; CC BY-SA 2.0; https://creativecommons.org/licenses/by-sa/2.0; https://commons.wikimedia.org/wiki/File:C._carlinoides-1.jpg; Photograph fitted to portrait canvas with editorial title panels; scene 8 uses a reviewed subject-preserving crop. 9. File:Carduus argentatus in Israel.jpg; Matankic; CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0; https://commons.wikimedia.org/wiki/File:Carduus_argentatus_in_Israel.jpg; Photograph fitted to portrait canvas with editorial title panels; scene 8 uses a reviewed subject-preserving crop. 10. File:Carduus acicularis.jpg; Walter HENNEAU; CC BY-SA 3.0; https://creativecommons.org/licenses/by-sa/3.0; https://commons.wikimedia.org/wiki/File:Carduus_acicularis.jpg; Photograph fitted to portrait canvas with editorial title panels; scene 8 uses a reviewed subject-preserving crop.