This name is a synonym of Tulipa orphanidea subsp. doerfleri (Gand.) Zonn..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 460228) with original publication details: Repert. Spec. Nov. Regni Veg. Beih. 30(3): 70 1932.
This name record (from WCSP) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Tulipa hageri in version 1 of The Plant List.