| 1 | Native | Africa | Northern Africa | Algeria | | n. | Quézel, P. & S. Santa. 1962-1963. Nouvelle flore de l'Algerie. Note: = Carduus pycnocephalus subsp. tenuiflorus (Curtis) Batt. |
| 1 | Native | Africa | Northern Africa | Morocco | | | Jahandiez, E. & R. Maire. 1931-1941. Catalogue des plantes du Maroc. Note: = Carduus pycnocephalus subsp. tenuiflorus (Curtis) Batt. |
| 1 | Native | Africa | Northern Africa | Tunisia | | | Pottier-Alapetite, G. 1979-1981. Flore de la Tunisie: Angiospermes-Dicotyledones. Note: = Carduus pycnocephalus subsp. tenuiflorus (Curtis) Batt. |
| 1 | Native | Europe | Middle Europe | Belgium | | | Tutin, T. G. et al., eds. 1964-1980. Flora europaea. |
| 1 | Native | Europe | Middle Europe | Netherlands | | | Tutin, T. G. et al., eds. 1964-1980. Flora europaea. |
| 1 | Native | Europe | Northern Europe | Ireland | | | Tutin, T. G. et al., eds. 1964-1980. Flora europaea. |
| 1 | Native | Europe | Northern Europe | United Kingdom | | | Tutin, T. G. et al., eds. 1964-1980. Flora europaea. |
| 1 | Native | Europe | Southeastern Europe | Italy | | incl. Sardinia, Sicily | Tutin, T. G. et al., eds. 1964-1980. Flora europaea. |
| 1 | Native | Europe | Southwestern Europe | France | | incl. Corsica | Tutin, T. G. et al., eds. 1964-1980. Flora europaea. |
| 1 | Native | Europe | Southwestern Europe | Portugal | | | Tutin, T. G. et al., eds. 1964-1980. Flora europaea. |
| 1 | Native | Europe | Southwestern Europe | Spain | | incl. Baleares | Tutin, T. G. et al., eds. 1964-1980. Flora europaea. |
| 3 | Adventive | Europe | Middle Europe | Czech Republic | | | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 3 | Adventive | Europe | Middle Europe | Poland | | | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 3 | Adventive | Europe | Northern Europe | Norway | | | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 3 | Adventive | Europe | Northern Europe | Sweden | | | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 4 | Naturalized | Africa | Macaronesia | Portugal | Azores | | Silva, L. et al. 2005. Listagem da fauna e flora terrestres dos Açores. Lista des plantas vasculares (Pteridophyta e Spermatophyta). |
| 4 | Naturalized | Africa | Macaronesia | Portugal | Madeira Islands | | |
| 4 | Naturalized | Africa | Macaronesia | Spain | Canarias | | Arechavaleta, M. et al., coords. 2009. Lista de especies silvestres de Canarias: hongos, plantas y animales terrestres |
| 4 | Naturalized | Africa | Southern Africa | South Africa | Eastern Cape | | Germishuizen, G. & N. L. Meyer, eds. 2003. Plants of southern Africa: an annotated checklist. Strelitzia 14 National Botanical Institute, Pretoria, South Africa. |
| 4 | Naturalized | Africa | Southern Africa | South Africa | KwaZulu-Natal | | Germishuizen, G. & N. L. Meyer, eds. 2003. Plants of southern Africa: an annotated checklist. Strelitzia 14 National Botanical Institute, Pretoria, South Africa. |
| 4 | Naturalized | Africa | Southern Africa | South Africa | Mpumalanga | | Germishuizen, G. & N. L. Meyer, eds. 2003. Plants of southern Africa: an annotated checklist. Strelitzia 14 National Botanical Institute, Pretoria, South Africa. |
| 4 | Naturalized | Africa | Southern Africa | South Africa | Western Cape | | Germishuizen, G. & N. L. Meyer, eds. 2003. Plants of southern Africa: an annotated checklist. Strelitzia 14 National Botanical Institute, Pretoria, South Africa. |
| 4 | Naturalized | Asia-Tropical | Indian Subcontinent | India | Jammu and Kashmir | | Sharma, B. D. et al., eds. 1993-. Flora of India. |
| 4 | Naturalized | Australasia | Australia | Australia | | | Lazarides, M. & B. Hince. 1993. CSIRO Handbook of Economic Plants of Australia |
| 4 | Naturalized | Australasia | New Zealand | New Zealand | | | Allan, H. H. B. et al. 1961-. Flora of New Zealand. |
| 4 | Naturalized | Europe | Middle Europe | Switzerland | | | Tutin, T. G. et al., eds. 1964-1980. Flora europaea. |
| 4 | Naturalized | Northern America | Northeastern U.S.A. | United States | New Jersey | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Northeastern U.S.A. | United States | Pennsylvania | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Northwestern U.S.A. | United States | Oregon | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | Northwestern U.S.A. | United States | Washington | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | South-Central U.S.A. | United States | Texas | | Turner, B. L. et al. 2003. Atlas of the vascular plants of Texas. Sida Botanical Miscellany no. 24 |
| 4 | Naturalized | Northern America | Southwestern U.S.A. | United States | California | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Southern America | Southern South America | Argentina | | | Instituto de Botánica Darwinion. 2008. Flora del Conosur. Catálogo de las plantas vasculares. |
| 4 | Naturalized | Southern America | Southern South America | Uruguay | | | Instituto de Botánica Darwinion. 2008. Flora del Conosur. Catálogo de las plantas vasculares. |