Compositae Working Group (CWG) (2021). Global Compositae Database. Carduus occidentalis Nutt.. Accessed at: https://www.compositae.org/aphia.php?p=taxdetails&id=1099234 on 2024-05-04
Present Inaccurate Introduced: alien Containing type locality
From other sources
Contributed data: Published Data only shown for fields conflicting with the consensus taxon record Trans. Amer. Philos. Soc. , n.s., 7 [Govaerts World Compositae Checklist A-G] Transactions of the American Philosophical Society, new series, 7: [Tropicos] [details] LSID urn:lsid:compositae.org:names:07753B95-47FF-4548-85AC-7FABFB46EF2F [details] Taxonomy 2 Apr 1841 [details]