Compositae Working Group (CWG) (2021). Global Compositae Database. Helianthus nigrescens Heiser. Accessed at: https://compositae.org/aphia.php?p=taxdetails&id=1200790 on 2024-05-14
original description(1955). Brittonia 8 page(s): 287 [details]
From other sources
Contributed data: Published Data only shown for fields conflicting with the consensus taxon record Brittonia 8: [Tropicos] [details] LSID urn:lsid:compositae.org:names:22ED0962-8E1A-4849-99C0-B9CEDF117238 [details] Type material E-3903, W.H.Camp, lectotype NY, isotype MO, isotype UC [details]