Compositae Working Group (CWG) (2021). Global Compositae Database. Haplopappus phyllocephalus var. annuus (Rydb.) Waterf.. Accessed at: https://www.compositae.org/aphia.php?p=taxdetails&id=1238768 on 2025-03-27
Contributed data: Full Name Data only shown for fields conflicting with the consensus taxon record Haplopappus phyllocephalus DC. var. annuus (Rydb.) Waterf. [IPNI] Haplopappus phyllocephalus DC. var. annuus (Rydb.) Waterf. [Preliminary Checklist of North American Compositae] [details] LSID urn:lsid:compositae.org:names:34F8A714-78E5-4FF0-B32F-F593AC9827A9 [details]