Compositae Working Group (CWG) (2025). Global Compositae Database. Haplopappus peirsonii (D.D.Keck) J.T.Howell. Accessed at: https://www.compositae.org/gcd/aphia.php?p=taxdetails&id=1202303 on 2025-09-13
Contributed data: Authors Data only shown for fields conflicting with the consensus taxon record (D.D. Keck) J.T. Howell [Preliminary Checklist of North American Compositae] (D.D. Keck) J.T. Howell [Tropicos] [details] Contributed data: Basionym Data only shown for fields conflicting with the consensus taxon record Haplopappus eximius subsp. peirsonii D.D. Keck [Tropicos] [details] Contributed data: Full Name Data only shown for fields conflicting with the consensus taxon record Haplopappus peirsonii (D.D. Keck) J.T. Howell [Preliminary Checklist of North American Compositae] Haplopappus peirsonii (D.D. Keck) J.T. Howell [Tropicos] [details] Contributed data: Published Data only shown for fields conflicting with the consensus taxon record Leaflets of Western Botany 6(4): [Tropicos] [details] LSID urn:lsid:compositae.org:names:D27E45BD-A606-4E23-8DB2-C192634BABB9 [details] Taxonomy as "Aplopappus Peirsonii" [details]