This name is a synonym of Hieracium lachenalii subsp. epichlorum (Litv. & Zahn) Greuter.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record BF18183D-DB28-4981-A158-E460F52D68D0) with original publication details: 238 1907.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:51021447-1.
This name was in version 1 of The Plant List, record gcc-69161, and has not been changed.