This name is a synonym of Pilosella lactucella subsp. nana (Scheele) M.Laínz.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record C3153A41-8B48-492C-B7C8-BE20140F3A94) with original publication details: 259 1976.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:877435-1.
This name was in version 1 of The Plant List, record gcc-64382.