Compositae Working Group (CWG) (2025). Global Compositae Database. Helianthus occidentalis var. dowellianus (M.A.Curtis) Torr. & A.Gray. Accessed at: https://www.compositae.org/gcd/aphia.php?p=taxdetails&id=1225328 on 2025-09-13
original description(1843). A Flora of North America: containing . . . 2(3): page(s): 504 [details]
Unreviewed
Contributed data: Authors Data only shown for fields conflicting with the consensus taxon record (M.A. Curtis) Torr. & A. Gray [Preliminary Checklist of North American Compositae] (M.A. Curtis) Torr. & A. Gray [Tropicos] [details] Contributed data: Basionym Data only shown for fields conflicting with the consensus taxon record Helianthus dowellianus M.A. Curtis [Tropicos] [details] Contributed data: Full Name Data only shown for fields conflicting with the consensus taxon record Helianthus occidentalis Riddell var. dowellianus (M.A. Curtis) Torr. & A. Gray [Preliminary Checklist of North American Compositae] Helianthus occidentalis var. dowellianus (M.A. Curtis) Torr. & A. Gray [Tropicos] [details] LSID urn:lsid:compositae.org:names:73C3D517-F8A4-4780-A1AE-0FE8A4769313 [details] Taxonomy as "Dowellianus" [details]