| 1 | Native | Africa | Northern Africa | Algeria | | | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 1 | Native | Africa | Northern Africa | Morocco | | | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 1 | Native | Africa | Northern Africa | Tunisia | | | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 1 | Native | Asia-Temperate | Caucasus | Armenia | | | Komarov, V. L. et al., eds. 1934-1964. Flora SSSR. |
| 1 | Native | Asia-Temperate | Caucasus | Azerbaijan | | | Komarov, V. L. et al., eds. 1934-1964. Flora SSSR. |
| 1 | Native | Asia-Temperate | Caucasus | Georgia | | | Komarov, V. L. et al., eds. 1934-1964. Flora SSSR. |
| 1 | Native | Asia-Temperate | Caucasus | Russian Federation | Dagestan | | Komarov, V. L. et al., eds. 1934-1964. Flora SSSR. |
| 1 | Native | Asia-Temperate | Caucasus | Russian Federation-Ciscaucasia | Ciscaucasia | | Komarov, V. L. et al., eds. 1934-1964. Flora SSSR. |
| 1 | Native | Asia-Temperate | China | China | Xinjiang Uygur Zizhiqu | n. | Wu Zheng-yi & P. H. Raven et al., eds. 1994-. Flora of China (English edition). |
| 1 | Native | Asia-Temperate | Middle Asia | Kazakhstan | | | Komarov, V. L. et al., eds. 1934-1964. Flora SSSR. |
| 1 | Native | Asia-Temperate | Mongolia | Mongolia | | | Grubov, V. I. 2001. Key to the vascular plants of Mongolia |
| 1 | Native | Asia-Temperate | Siberia | Russian Federation | Altay | | Krasnoborov, I. M., ed. 2000-. Flora of Siberia (English translation) |
| 1 | Native | Asia-Temperate | Siberia | Russian Federation | Buryatia | | Krasnoborov, I. M., ed. 2000-. Flora of Siberia (English translation) |
| 1 | Native | Asia-Temperate | Siberia | Russian Federation | Chita | | Krasnoborov, I. M., ed. 2000-. Flora of Siberia (English translation) |
| 1 | Native | Asia-Temperate | Siberia | Russian Federation | Gorno-Altay | | Krasnoborov, I. M., ed. 2000-. Flora of Siberia (English translation) |
| 1 | Native | Asia-Temperate | Siberia | Russian Federation | Irkutsk | s. | Krasnoborov, I. M., ed. 2000-. Flora of Siberia (English translation) |
| 1 | Native | Asia-Temperate | Siberia | Russian Federation | Kemerovskaja oblast' | | Krasnoborov, I. M., ed. 2000-. Flora of Siberia (English translation) |
| 1 | Native | Asia-Temperate | Siberia | Russian Federation | Krasnoyarsk | | Krasnoborov, I. M., ed. 2000-. Flora of Siberia (English translation) |
| 1 | Native | Asia-Temperate | Siberia | Russian Federation | Kurganskaja oblast' | | Krasnoborov, I. M., ed. 2000-. Flora of Siberia (English translation) |
| 1 | Native | Asia-Temperate | Siberia | Russian Federation | Novosibirsk | | Krasnoborov, I. M., ed. 2000-. Flora of Siberia (English translation) |
| 1 | Native | Asia-Temperate | Siberia | Russian Federation | Omsk | | Krasnoborov, I. M., ed. 2000-. Flora of Siberia (English translation) |
| 1 | Native | Asia-Temperate | Siberia | Russian Federation | Tomsk | | Krasnoborov, I. M., ed. 2000-. Flora of Siberia (English translation) |
| 1 | Native | Asia-Temperate | Siberia | Russian Federation | Tyumen | | Krasnoborov, I. M., ed. 2000-. Flora of Siberia (English translation) |
| 1 | Native | Asia-Temperate | Siberia | Russian Federation | Tyva, Respublika | | Krasnoborov, I. M., ed. 2000-. Flora of Siberia (English translation) |
| 1 | Native | Asia-Temperate | Siberia | Russian Federation | Yakutia-Sakha | s. | Krasnoborov, I. M., ed. 2000-. Flora of Siberia (English translation) |
| 1 | Native | Asia-Temperate | Western Asia | Afghanistan | | | Rechinger, K. H., ed. 1963-. Flora iranica. Note: = Carduus thoermeri Weinm. |
| 1 | Native | Asia-Temperate | Western Asia | Iran | | n.w. | Rechinger, K. H., ed. 1963-. Flora iranica. Note: = Carduus thoermeri Weinm. |
| 1 | Native | Asia-Temperate | Western Asia | Turkey | | | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 1 | Native | Europe | Eastern Europe | Belarus | | | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 1 | Native | Europe | Eastern Europe | Estonia | | | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 1 | Native | Europe | Eastern Europe | Lithuania | | | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 1 | Native | Europe | Eastern Europe | Moldova | | | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 1 | Native | Europe | Eastern Europe | Russian Federation-European part | European part | | Komarov, V. L. et al., eds. 1934-1964. Flora SSSR. |
| 1 | Native | Europe | Eastern Europe | Ukraine | | incl. Krym | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 1 | Native | Europe | Middle Europe | Austria | | | Tutin, T. G. et al., eds. 1964-1980. Flora europaea. |
| 1 | Native | Europe | Middle Europe | Belgium | | | Tutin, T. G. et al., eds. 1964-1980. Flora europaea. |
| 1 | Native | Europe | Middle Europe | Czech Republic | | | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 1 | Native | Europe | Middle Europe | Germany | | | Tutin, T. G. et al., eds. 1964-1980. Flora europaea. |
| 1 | Native | Europe | Middle Europe | Hungary | | | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 1 | Native | Europe | Middle Europe | Netherlands | | | Tutin, T. G. et al., eds. 1964-1980. Flora europaea. |
| 1 | Native | Europe | Middle Europe | Slovakia | | | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 1 | Native | Europe | Middle Europe | Switzerland | | | Tutin, T. G. et al., eds. 1964-1980. Flora europaea. |
| 1 | Native | Europe | Northern Europe | Ireland | | | Sell, P. & G. Murrell. 1996-. Flora of Great Britain and Ireland. |
| 1 | Native | Europe | Northern Europe | United Kingdom | | | Tutin, T. G. et al., eds. 1964-1980. Flora europaea. |
| 1 | Native | Europe | Southeastern Europe | Albania | | | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 1 | Native | Europe | Southeastern Europe | Bosnia and Herzegovina | | | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 1 | Native | Europe | Southeastern Europe | Bulgaria | | | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 1 | Native | Europe | Southeastern Europe | Croatia | | | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 1 | Native | Europe | Southeastern Europe | Greece | | | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 1 | Native | Europe | Southeastern Europe | Italy | | incl. Sardinia, Sicily | Tutin, T. G. et al., eds. 1964-1980. Flora europaea. |
| 1 | Native | Europe | Southeastern Europe | Montenegro | | | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 1 | Native | Europe | Southeastern Europe | North Macedonia | | | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 1 | Native | Europe | Southeastern Europe | Romania | | | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 1 | Native | Europe | Southeastern Europe | Serbia | | | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 1 | Native | Europe | Southeastern Europe | Slovenia | | | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 1 | Native | Europe | Southwestern Europe | France | | | Tutin, T. G. et al., eds. 1964-1980. Flora europaea. |
| 1 | Native | Europe | Southwestern Europe | Spain | | | Tutin, T. G. et al., eds. 1964-1980. Flora europaea. |
| 3 | Adventive | Europe | Eastern Europe | Latvia | | | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 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. Note: treats as Carduus macrocephalus Desf. |
| 4 | Naturalized | Australasia | Australia | Australia | | | Hnatiuk, R. J. 1990. Census of Australian vascular plants. Australian Flora and Fauna Series No. 11. |
| 4 | Naturalized | Australasia | New Zealand | New Zealand | | | Allan, H. H. B. et al. 1961-. Flora of New Zealand. |
| 4 | Naturalized | Europe | Middle Europe | Poland | | | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 4 | Naturalized | Europe | Northern Europe | Denmark | | | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 4 | Naturalized | Europe | Northern Europe | Finland | | | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 4 | Naturalized | Europe | Northern Europe | Norway | | | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 4 | Naturalized | Europe | Northern Europe | Sweden | | | Euro+Med Editorial Committee. Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). |
| 4 | Naturalized | Northern America | | Canada | | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Northern America | | United States | | | FNA Editorial Committee. 1993-. Flora of North America. |
| 4 | Naturalized | Southern America | Southern South America | Chile | | | Instituto de Botánica Darwinion. 2008. Flora del Conosur. Catálogo de las plantas vasculares. |