Compositae Working Group (CWG) (2025). Global Compositae Database. Haplopappus occidentalis H.M.Hall. Accessed at: https://www.compositae.org/gcd/aphia.php?p=taxdetails&id=1184405 on 2025-09-11
original description(1928). Publ. Carnegie Inst. Wash. 389[details]
Unreviewed
Contributed data: Authors Data only shown for fields conflicting with the consensus taxon record H.M. Hall [Tropicos] [details] Contributed data: Full Name Data only shown for fields conflicting with the consensus taxon record Haplopappus occidentalis H.M. Hall [Tropicos] [details] Contributed data: Published Data only shown for fields conflicting with the consensus taxon record 389 [IPNI] Publications of the Carnegie Institution of Washington 389: [Tropicos] [details] LSID urn:lsid:compositae.org:names:4E742880-ECE9-4E0D-9754-64BC7FDD022F [details] Taxonomy 1 Oct 1928 [details] Type material 11769, H. M. Hall, east side of summit, Parkfield Grade, holotype UC [details]