Well, if your 'Pancratium' looked sort of like a 'yellow Hymenocallis' then it's not Hymenocallis, because a 'yellow Hymenocallis' is not a Hymenocallis and Hymenocallis doesn't look very much like Pancratium. Hymenocallis doesn't come in yellow as far as I know; the 'yellow Hymenocallis' would be an Ismene. Ismene amancaes is yellow, and there is also a cross "Sulfur Queen" which is butter yellow. David E.