Lunaria annua 'Variegata'

Your reason is the reason I thought it was not Lychnis chalcedonica. Since I have Maltese Cross in another section of the garden I took flowers and leaves from the mystery plant and examined them next to the known plant. They are virtually the same. The color, texture, shape of the leaves and petals all match. The difference was the delicate plant versus the very sturdy plant that grows elsewhere. I decided that since the "volunteer" was new it was just delicate and not fully developed. It came up in what's supposed to be my new strawberry patch. Many volunteers showed up there since the strawberries have been slow to take hold. Thanks for your input. I really appreciate it.

My brief experience with the usual respondentes in this page is that no one, or very few, are game to have a go at clarifing your query without a photo. So, how about a pic? If you have one you can post, it'd be much more descriptiive of your plant.

Very bad image but it might be a Ruellia brittoniana. HTH Chris Here is a link that might be useful: