Miss Winnie says she had no Purple. The best I can determine, her white irises may have been pollinated by bees visiting from another garden, dropped seeds and this is the result.
Ordinarily, gardeners complain that their purple Irises have 'turned white.' What happens is the hybrid Irises die out and the hardier white takes over.
What ever the case, I am happy to have this Purple. The White has a bud too. I'll put a little piece of surveyor tape around this stem and move Purple in August.