Compositae Working Group (CWG) (2021). Global Compositae Database. Petasites palmatus var. frigidus Macoun. Accessed at: https://compositae.org/aphia.php?p=taxdetails&id=1242044 on 2025-03-28
Contributed data: Full Name Data only shown for fields conflicting with the consensus taxon record Petasites palmatus (Aiton) A. Gray var. frigidus Macoun [Preliminary Checklist of North American Compositae] [details] LSID urn:lsid:compositae.org:names:5628A88A-6C5C-4607-BCB4-1DF199BDDB51 [details]