Compositae Working Group (CWG) (2021). Global Compositae Database. Carduus osterhoutii Rydb.. Accessed at: https://www.compositae.org/aphia.php?p=taxdetails&id=1174707 on 2024-05-18
original description(1905). Bull. Torrey Bot. Club 32 page(s): 131 [details]
From other sources
Contributed data: Published Data only shown for fields conflicting with the consensus taxon record Bull. Torrey Bot. Club [IPNI] Bulletin of the Torrey Botanical Club 32(3): [Tropicos] [details] LSID urn:lsid:compositae.org:names:A112336B-0DDC-4661-A2D3-31386CB58C7B [details] Taxonomy as "Osterhoutii" [details]