Bellevalia sarmatica (Pall. ex Miscz.) Woronow is a synonym of
Bellevalia speciosa Woronow ex Grossh.
Remarkable that a spoke of tight buds as is sonn in Kot's photo can expand to the very lax, openflower head that we see in this photo from Janis Ruksans -
Bellevalia sarmatica BATM-166
No wonder we find flowers so interesting.