I understand that the genus Zephyranthes is limited to the Western hemisphere. Perhaps Colchicum sp? Colchicum alpinum?
According to http://luirig.altervista.org/flora/taxa/index1.php?scientific-name=zephyranthes+carinata, geographic distribution of Z. carinata in Italy is limited to Lombardia (Northern Italy) below 500 m asl. I observed this flower upon Monte Gennaro, at 1,200 m asl approx. Zephyranthes carinata [Zefirante carenato] Colchicum alpinum [Colchico minore] Colchicum alpinum - Wikipedia, the free encyclopedia
It sure looks exactly like Colchicum alpinum subsp. alpinum Picture ID: 245507 - Colchicum alpinum subsp. alpinum (sub-page of the web page in your link Elena)
