Compositae Working Group (CWG) (2024). Global Compositae Database. Hieracium horridum Fr.. Accessed at: https://www.compositae.org/gcd/aphia.php?p=taxdetails&id=1090660 on 2025-03-24
Contributed data: Published Data only shown for fields conflicting with the consensus taxon record Uppsala Universitets Arsskrift 1862: [Tropicos] [details] LSID urn:lsid:compositae.org:names:71221DE5-C551-4C9A-9F03-3C3F0E8C107C [details]