Compositae Working Group (CWG) (2021). Global Compositae Database. Ptilocalais major (A.Gray) Greene. Accessed at: https://www.compositae.org/aphia.php?p=taxdetails&id=1205671 on 2025-04-10
Contributed data: Authors Data only shown for fields conflicting with the consensus taxon record (A. Gray) Greene [Cichorieae Portal] (A. Gray) Greene [Tropicos] Greene [IPNI] [details] Contributed data: Basionym Data only shown for fields conflicting with the consensus taxon record Ptilophora major A. Gray [Cichorieae Portal] Ptilophora major A. Gray [Tropicos] [details] Contributed data: Full Name Data only shown for fields conflicting with the consensus taxon record Ptilocalais major (A. Gray) Greene [Cichorieae Portal] Ptilocalais major (A. Gray) Greene [Tropicos] Ptilocalais major Greene [IPNI] [details] LSID urn:lsid:compositae.org:names:6547B65C-2F2A-4B36-BDB0-D36F4D935C86 [details] Taxonomy 1887 publ. 1886 [details] Type material [USA, Oregon] "Clearwater, on the Kooskooskee", Spalding [details]