Compositae Working Group (CWG) (2021). Global Compositae Database. Marshallia williamsonii Small. Accessed at: https://www.compositae.org/aphia.php?p=taxdetails&id=1211112 on 2024-08-31
original description(1903). Fl. S.E. U.S. [Small]. page(s): 1284, 1340 [details]
From other sources
Contributed data: Published Data only shown for fields conflicting with the consensus taxon record Flora of the Southeastern United States [Tropicos] [details] LSID urn:lsid:compositae.org:names:2CA22681-ECEC-4890-8E90-F025630FF144 [details] Taxonomy 22 Jul 1903 [details]