sanddune catseye, Cryptantha fendleri

I have a hypothesis about these pretty little flowers. They appear to open with a yellow eye, which fades to white. There's always a reason for floral behavior. Could it be that they turn white after they're pollinated? Bees like color. Are the flowers telling their pollinator's to take their pollen somewhere else that needs it more? Some curious botanist needs to set up a motion sensitive camera to record bee visits, and count how often each color flower is visited. It wouldn't be hard to find the plants. This species is common in dry sandy or rocky places in AK, AZ, CA(R), CO, ID, MT, NE, NM, NV, OR, SD, UT, WA, WY, AB, BC, and SK. Lake CO CO, 6/20/13.