Compositae Working Group (CWG) (2021). Global Compositae Database. Haplopappus annuus (Rydb.) Cory. Accessed at: https://www.compositae.org/aphia.php?p=taxdetails&id=1202180 on 2024-05-18
Contributed data: Published Data only shown for fields conflicting with the consensus taxon record Rhodora 38(455): [Tropicos] [details] LSID urn:lsid:compositae.org:names:805358ED-1E99-4B50-AE17-C0C18B8CD1DF [details] Taxonomy as "Aplopappus" [details]