Compositae Working Group (CWG) (2021). Global Compositae Database. Hieracium firmum Jord.. Accessed at: https://www.compositae.org/aphia.php?p=taxdetails&id=1176283 on 2025-03-24
original description(1848). Cat. Gr. Jard. Dijon page(s): 22 [details]
Unreviewed
Contributed data: Published Data only shown for fields conflicting with the consensus taxon record Cat. Graines Jard. Dijon 1848: 22. 1848 [Cichorieae Portal] Jord.. 1848. [Euro+Med] [details] LSID urn:lsid:compositae.org:names:1259FF5A-D81A-4983-80D4-3A0ECF8874ED [details]