A while back, I picked up some small cactus plants at the garden center at Wal-Mart. I planted them in small pots on the patio and they have done rather well. In fact, several of them have bloomed this summer. They have also grown, so I transplanted them into larger containers. They seem to love having new root room and are doing well.
They bloom at night, so it's hard to see much of these flowers. Last night, I saw that one of them was getting ready to bloom so I took photos.
Very soon after the flower was pollinated, the flower began to close. This photos were taken at 8 AM and 9 AM.