Compositae Working Group (CWG) (2025). Global Compositae Database. Carduus austrinus Small. Accessed at: https://www.compositae.org/gcd/aphia.php?p=taxdetails&id=1146534 on 2025-04-03
original description(1903). Fl. S.E. U.S. [Small].[details]
Unreviewed
Contributed data: Published Data only shown for fields conflicting with the consensus taxon record Fl. S.E. U.S. [Govaerts World Compositae Checklist A-G] Flora of the Southeastern United States [Tropicos] [details] LSID urn:lsid:compositae.org:names:4CB336C2-C2AD-471D-BE78-EE91769BF694 [details] Taxonomy 22 Jul 1903 [details]