Help with plant ID: white, 6 petals, Michigan wildflower?

Question:I saw this flower while walking on a nature trail in Michigan and haven't been able to identify it based on several field guides. It is fairly small (about 7 inches tall maximum?), and the flower has 6 white petals or sepals. What interests me the most is the varying petal sizes. This was growing wild in the same habitat as mayapple and wild geranium. Any help would be appreciated, even if you can just give a rough idea of what family this might be. Thank you! http://img.photobucket.com/albums/v116/n...

Answers:
How beautiful!! My guess is that it is a species of Vinca (which comes in many colors). The leaves look like Vinca.

Good Luck!!