Compositae Working Group (CWG) (2021). Global Compositae Database. Haplopappus hirtus subsp. sonchifolius (Greene) H.M.Hall. Accessed at: https://www.compositae.org/aphia.php?p=taxdetails&id=1223198 on 2025-03-27
Contributed data: Authors Data only shown for fields conflicting with the consensus taxon record (Greene) H.M. Hall [Preliminary Checklist of North American Compositae] (Greene) H.M. Hall [Tropicos] H.M.Hall [IPNI] [details] Contributed data: Full Name Data only shown for fields conflicting with the consensus taxon record Haplopappus hirtus A. Gray ssp. sonchifolius (Greene) H.M. Hall [Preliminary Checklist of North American Compositae] Haplopappus hirtus A.Gray subsp. sonchifolius H.M.Hall [IPNI] Haplopappus hirtus subsp. sonchifolius (Greene) H.M. Hall [Tropicos] [details] Contributed data: Published Data only shown for fields conflicting with the consensus taxon record Publications of the Carnegie Institution of Washington 389: [Tropicos] [details] LSID urn:lsid:compositae.org:names:4208BDE2-4EDC-4F3B-B213-DA6736B7A3BC [details]