Chinodoxia, Scilla and Puschkinia, aka Squill, are all members of the lily family and closely resemble one another. I'm not expert on the differences, so please forgive me if I have mislabeled the images in this floral group. I will try to make corrections as I learn more about these plants.

This plant is also known as "Squill" and is related to Scilla. See http://pbase.com/hjsteed/squill_or_scilla