Compositae Working Group (CWG) (2025). Global Compositae Database. Carduus orthocephalus Wallr.. Accessed at: https://compositae.org/gcd/aphia.php?p=taxdetails&id=1097931 on 2025-03-24
Present Inaccurate Introduced: alien Containing type locality
Unreviewed
Contributed data: Full Name Data only shown for fields conflicting with the consensus taxon record Carduus ×orthocephalus Wallr. [Govaerts World Compositae Checklist A-G] Carduus ×orthocephalus Wallr. [IPNI] Carduus ×orthocephalus Wallr. [Preliminary Checklist of North American Compositae] [details] Contributed data: Notes Data only shown for fields conflicting with the consensus taxon record [acanthoides × nutans] [Preliminary Checklist of North American Compositae] [details] LSID urn:lsid:compositae.org:names:B80710BB-A89A-45DD-8808-758151A1B1A0 [details] Taxonomy et in Linnaea, xiv. (1840) 86 [details]