Compositae Working Group (CWG) (2021). Global Compositae Database. Hieracium vierhapperi (Zahn) Szelag. Accessed at: https://www.compositae.org/aphia.php?p=taxdetails&id=1173798 on 2024-08-31
Contributed data: Basionym Data only shown for fields conflicting with the consensus taxon record Hieracium sparsum Friv. subsp. vierhapperi Zahn [IPNI] [details] Contributed data: Published Data only shown for fields conflicting with the consensus taxon record Szeląg in Polish J. Bot. 49. 2004 [Cichorieae Portal] Szeląg, in Polish J. Bot. 49. 2004. [Euro+Med] [details] LSID urn:lsid:compositae.org:names:6FA7F7F0-A6F9-43CB-A388-2CBD79FED97D [details] Taxonomy 29 Dec 2004 [details]