Compositae Working Group (CWG) (2021). Global Compositae Database. Carduus pycnocephalus Spreng.. Accessed at: https://www.compositae.org/aphia.php?p=taxdetails&id=1168285 on 2024-05-13
Contributed data: Published Data only shown for fields conflicting with the consensus taxon record Syst. Veg. 3 [Govaerts World Compositae Checklist A-G] [details] LSID urn:lsid:compositae.org:names:5AE28B95-9C16-4A26-B5C5-0F6C4AC88B92 [details] Status nom. illeg. [details] Taxonomy Jan-Mar 1826 [details]