Compositae Working Group (CWG) (2024). Global Compositae Database. Helianthus crassifolius Nutt.. Accessed at: https://www.compositae.org/gcd/aphia.php?p=taxdetails&id=1131573 on 2025-03-30
Contributed data: Published Data only shown for fields conflicting with the consensus taxon record Transactions of the American Philosophical Society, new series, 7: [Tropicos] [details] LSID urn:lsid:compositae.org:names:008E27AA-11F5-48A8-AAEF-73A493722A41 [details] Taxonomy 2 Apr 1841 [details]