This name is a synonym of Ornithogalum bourgaeanum Jord. & Fourr..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 465377) with original publication details: Fl. France 12: 417 1910.
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 Ornithogalum tenuifolium in version 1 of The Plant List.