Compositae Working Group (CWG) (2024). Global Compositae Database. Lactuca longifolia Michx.. Accessed at: https://www.compositae.org/gcd/aphia.php?p=taxdetails&id=1141206 on 2025-03-30
original description(1803). Fl. Bor.-Amer. (Michaux) 2 page(s): 85 [details]
Unreviewed
Contributed data: Published Data only shown for fields conflicting with the consensus taxon record Flora Boreali-Americana 2: [Tropicos] [details] LSID urn:lsid:compositae.org:names:F725519C-34CE-4146-B2DF-C227A5F9047D [details] Taxonomy 19 Mar 1803 [details]