Compositae Working Group (CWG) (2021). Global Compositae Database. Cirsium megacanthum Nutt.. Accessed at: https://www.compositae.org/aphia.php?p=taxdetails&id=1192490 on 2024-05-01
Contributed data: Notes Data only shown for fields conflicting with the consensus taxon record as "Circium" [Tropicos] [details] 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:C204ECA1-0EA3-4E0E-BA81-8F20999C09A3 [details] Taxonomy 2 Apr 1841 [details] Type material s.n., H. Little, Banks of Mississippi near New Orleans, lectotype PH [details]