Compositae Working Group (CWG) (2021). Global Compositae Database. Carduus spathulatus Osterh.. Accessed at: https://compositae.org/aphia.php?p=taxdetails&id=1144568 on 2024-05-18
original description(1905). Bull. Torrey Bot. Club 32 page(s): 612 [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(11): [Tropicos] [details] LSID urn:lsid:compositae.org:names:B047B157-F141-4D81-9F09-DE51BBEC4357 [details]