This name is a synonym of Lilium bosniacum (Beck) Fritsch.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 280902) with original publication details: Bot. Mag. (Kew Mag.) 1: 40 1984.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:923503-1.
This name was in version 1 of The Plant List, record kew-280902, and has not been changed.