This name is a synonym of Hieracium levicaule subsp. triviale (Norrl.) Zahn.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record CE48CF43-D95D-472C-A0A5-F89A2A727A66) with original publication details: 64 1905.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:77072707-1.
This name was in version 1 of The Plant List, record gcc-71752.