Unknown SC Flowering Plant

My wife and I saw this plant at a local chain restaurant and would like to plant them on our property. However, no one whom I have talked to knows what it is. It is probably not native to South Carolina but it definitely thrives in our summer.

 

Looks like a type of Ruellia (Mexican Petunia) to me.

 

Thanks for your help Rosemarie, it is Reullia. I then did some research on Ruellia and found photos of identical plants.