This name is a synonym of Hieracium lachenalii subsp. lortetiae (Balb.) Greuter.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 64F2A22B-995F-4ACF-AF6E-F0441D93CA52) with original publication details: 450 1827.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:219606-1.
This name was in version 1 of The Plant List, record gcc-138284, and has not been changed.