This name is a synonym of Hieracium laevigatum subsp. calothyrsum (Murr) Dalla Torre & Sarnth..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 510865B0-31D6-4823-9B2C-F7107ED62DFD) with original publication details: 74 1902.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:215759-1.
This name was in version 1 of The Plant List, record gcc-141298.