mystery bulb

[NOTLbelladonna]

This bulb bloomed in my garden yesterday. It opened up later in the day. I could not detect any fragrance. It is about 20 cm tall.
I would appreciate if anyone could tell me what it is. I suspected it may be one of Romuleas.
Laura Grant
Niagara on the Lake, Ontario

[Uli]

Hello Laura,

Are there any summer flowering Romulea?
My first thought looking at the flower and the leaves is Zephyranthes but no idea which species.