So I have what is supposed to be a Natchez Crepe Myrtle in my back your. I planted it a couple of years ago when it was about four feet high. It now reaches about 12 feet. Anyway, Natchez Crepe Myrtles are supposed to have white flowers but mine has white and pink flowers. it was like this last year also. I would say that it is roughly half white and half pink. I am pretty sure it's a Natchez Crepe Myrtle because it exhibits all the other manifestations of a Natchez...cinnamon colored back in the fall...the bark rolls up and peels up in the fall...etc. Does anyone have any idea why it does this? A couple of pics below...the full pic of the tree isn't great, sorry, it was getting dark.