Compositae Working Group (CWG) (2024). Global Compositae Database. Helianthus giganteus var. oppositifolius Farw.. Accessed at: https://www.compositae.org/gcd/aphia.php?p=taxdetails&id=1162406 on 2025-04-21
Contributed data: Full Name Data only shown for fields conflicting with the consensus taxon record Helianthus giganteus L. var. oppositifolius Farw. [IPNI] [details] LSID urn:lsid:compositae.org:names:63944711-6CFC-4A2E-B534-55133A45688F [details]