Thank you so much jmorth. I was given this wonderful plant in 2007 and I never knew the name. When you posted yours, I searched it out and mine is a Peruvian Daffodil as well.
Yours ,I believe is
Family: Amaryllidaceae
Genus: Hymenocallis
Species: festalis
Synonym:Ismene x festalis
Mine is
Family: Amaryllidaceae
Genus: Hymenocallis
Species: narcissiflora
Synonym:Ismene calathina
Mystery finally solved. Thanks again so much. I love this plant.
Susan, my flower is about 5 to 6" across