Compositae Working Group (CWG) (2021). Global Compositae Database. Cirsium occidentale var. occidentale (Nutt.) Jeps.. Accessed at: https://www.compositae.org/aphia.php?p=taxdetails&id=1156108 on 2024-05-17
Present Inaccurate Introduced: alien Containing type locality
From other sources
Contributed data: Full Name Data only shown for fields conflicting with the consensus taxon record Cirsium occidentale var. occidentale [Tropicos] [details] LSID urn:lsid:compositae.org:names:989B6C71-1154-4727-95C9-19A99572487C [details]