Compositae Working Group (CWG) (2021). Global Compositae Database. Cirsium breweri subsp. howellii (Petr.) Petr.. Accessed at: https://www.compositae.org/aphia.php?p=taxdetails&id=1221169 on 2025-03-28
Contributed data: Authors Data only shown for fields conflicting with the consensus taxon record Petr. [IPNI] [details] Contributed data: Basionym Data only shown for fields conflicting with the consensus taxon record Cirsium howellii [Govaerts World Compositae Checklist A-G] [details] Contributed data: Full Name Data only shown for fields conflicting with the consensus taxon record Cirsium breweri subsp. howellii Petr. [IPNI] [details] Contributed data: Published Data only shown for fields conflicting with the consensus taxon record Beih. Bot. Centralbl. 35(2) [Govaerts World Compositae Checklist A-G] [details] LSID urn:lsid:compositae.org:names:ECA487CD-DA64-4EAD-B9A1-9BC43013C397 [details]