Compositae Working Group (CWG) (2021). Global Compositae Database. Helianthus rigidus subsp. laetiflorus (Rydb.) Heiser. Accessed at: https://compositae.org/aphia.php?p=taxdetails&id=1216943 on 2025-03-28
Contributed data: Full Name Data only shown for fields conflicting with the consensus taxon record Helianthus rigidus (Cass.) Desf. ssp. laetiflorus (Rydb.) Heiser [Preliminary Checklist of North American Compositae] [details] LSID urn:lsid:compositae.org:names:F1FE8944-FED5-48B7-A9B1-1B6A1F8FD10F [details]