This name is a synonym of Hieracium laevigatum subsp. tridentatum (Fr.) Čelak..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record E0580C7D-86FD-4D13-B34C-CF3BC2E709DB) with original publication details: "Fr., Novit. Fl. Suec. 1819." 77 1819.
This name was in version 1 of The Plant List, record gcc-66498.