Money Plant

Two years ago, I planted seeds for Money Plant (Lunaria). Being a biennial, it bloomed last year. Money Plant can have white or purple flowers. For some reason, all of mine were white flowers. I saved the seeds and planted them this year in the purple garden and the cosmos garden. For the life of me I cannot remember what I was thinking when I planted seeds for a white flower in the purple garden.

At the same time, some mystery plants in the Medieval Garden and the Yellow/Orange Garden from last year turned out to be Money Plants. The seeds must have been carried into my yard courtesy of my feathered friends. They were also kind enough to drop some in my neighbor's yard. All of the plants have purple flowers! I'm going to save the seed from the plants in my yard to plant next year.

The big question in my mind is what color(s) will the flowers be from the seeds I saved from the white flowered plants and from the purple flowered plants? Is one color dominant and one recessive? Can white flowers only produce white flowers or will they produce both colors? If it produces both colors, will there be more white than purple? Obviously, I was paying attention in Biology class oh so many years ago.