Compositae Working Group (CWG) (2021). Global Compositae Database. Haplopappus spinulosus subsp. laevis H.M.Hall. Accessed at: https://www.compositae.org/aphia.php?p=taxdetails&id=1217911 on 2025-04-12
original description(1928). Publications of the Carnegie Institution of Washington 389: page(s): 78 [details]
Unreviewed
Contributed data: Authors Data only shown for fields conflicting with the consensus taxon record (Woot. & Standl.) H.M. Hall [Preliminary Checklist of North American Compositae] (Wooton & Standl.) H.M. Hall [Tropicos] [details] Contributed data: Full Name Data only shown for fields conflicting with the consensus taxon record Haplopappus spinulosus (Pursh) DC. ssp. laevis (Woot. & Standl.) H.M. Hall [Preliminary Checklist of North American Compositae] Haplopappus spinulosus subsp. laevis (Wooton & Standl.) H.M. Hall [Tropicos] [details] LSID urn:lsid:compositae.org:names:AE0FEEA3-B9E8-4076-862C-373D90082CF7 [details]