Compositae Working Group (CWG) (2021). Global Compositae Database. Carduus tweedyi Rydb.. Accessed at: https://www.compositae.org/aphia.php?p=taxdetails&id=1203900 on 2025-03-25
original description(1900). Mem. New York Bot. Gard. 1 page(s): 449 [details]
Unreviewed
Contributed data: Published Data only shown for fields conflicting with the consensus taxon record Memoirs of the New York Botanical Garden 1: [Tropicos] [details] LSID urn:lsid:compositae.org:names:FD68D52C-21D9-46DC-9A9B-C9F40AA32A3D [details] Taxonomy as "Tweedyi" [details]