Compositae Working Group (CWG) (2021). Global Compositae Database. Cirsium extraneum Beck. Accessed at: https://www.compositae.org/aphia.php?p=taxdetails&id=1131620 on 2024-05-08
original description(1992). Fl. Nieder-Osterreich 2 page(s): 1242 [details]
From other sources
Contributed data: Full Name Data only shown for fields conflicting with the consensus taxon record Cirsium ×extraneum Beck [Govaerts World Compositae Checklist A-G] Cirsium ×extraneum Beck [IPNI] [details] Contributed data: Published Data only shown for fields conflicting with the consensus taxon record Fl. Nieder-Österreich 2 [Govaerts World Compositae Checklist A-G] [details] LSID urn:lsid:compositae.org:names:A0E16958-E2CD-4F62-9A90-740A57C631F6 [details]