This is my moon plant. My green thumb neighbor at our previous home gave me seeds one year which I planted in a big pot on the front porch. It comes back every year, so when we brought the big pot in the move back in the fall, the moon plant, in it's dormant state came along with it. It sprouted three plants this year. I let this one grow in the same pot and moved two of them over to the well planter.
The moon plant blooms at night, hence the name, and then closes up during the day, which is too bad because we aren't usually out at night to enjoy it. Although, it doesn't close up immediately at daybreak, so it can be enjoyed part of the morning.