Compositae Working Group (CWG) (2021). Global Compositae Database. Cirsium clavatum var. clavatum. Accessed at: https://www.compositae.org/aphia.php?p=taxdetails&id=1156154 on 2024-05-19
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 clavatum (M.E. Jones) Petrak var. clavatum [Preliminary Checklist of North American Compositae] [details] LSID urn:lsid:compositae.org:names:38D24F35-102A-4B7C-8BDC-1D4F795CD3F0 [details]