After several rounds of cuttings, the new striped form proved to be stable with all the desirable characteristics of Blue Princess. Due to the striped flowers, I named it Pinwheel Princess. That same year, Matt Welch, an SFA graduate found the exact same sport in a North Carolina garden. Matt is now our arboretum technician. Especially one with a good eye for plants.
Sports are accidental shoots on a plant that are different in some aspect from the original plants.
Other chance sports that come to mind are red grapefruit, delicious type apples, and many climbing roses. Keep your eyes open. You might just find one for yourself. Despite the fact that the flower color of Pinwheel Princess is mostly stable, I later found an all white sport that I'll be introducing this year as Ice Princess verbena. Unlike seedlings that don't necessarily have the same characteristics as their parents, sports are often identical in their other characters.