Compositae Working Group (CWG) (2021). Global Compositae Database. Silphium laevigatum Pursh. Accessed at: https://www.compositae.org/aphia.php?p=taxdetails&id=1171807 on 2024-05-17
original description(1813). Fl. Amer. Sept. (Pursh) 2 page(s): 578 [details]
From other sources
Contributed data: Published Data only shown for fields conflicting with the consensus taxon record Flora Americae Septentrionalis; or, . . . 2: [Tropicos] [details] LSID urn:lsid:compositae.org:names:403FBC68-95FB-4037-AA54-2221840817E5 [details] Taxonomy Dec 1813 [details]