Compositae Working Group (CWG) (2021). Global Compositae Database. Silphium simpsonii Greene. Accessed at: https://www.compositae.org/aphia.php?p=taxdetails&id=1183775 on 2025-03-31
original description(1899). Pittonia 4 page(s): 44 [details]
Present Inaccurate Introduced: alien Containing type locality
Unreviewed
Contributed data: Published Data only shown for fields conflicting with the consensus taxon record Pittonia 4(20E): [Tropicos] [details] LSID urn:lsid:compositae.org:names:50DBB4DA-302C-4606-97B3-617D8BB402BF [details] Taxonomy as "Simpsonii" [details]