That's my best guess. If you look up Lenten Rose Ivory Prince and then look up Christmas Rose Ivory Prince They both lead you to the name Helleborus X nigersmithit Walhelivor, Which leans more toward Christmas Rose. But when I bought mine they were called Lenten Rose. Both are referred to as hybrids. So I figured at this point it is safer to just call them Hellebours niger Ivory Prince.
