Thanks, Janice.
The picture's confusing, but that is only one phlox plant.
It's 'Twister' and it has a mutated branch, apparently back to the cultivar it was bred from.
The 'Twister' flower is mostly white but with pink ribbing (pinwheel).
The pink/red branch in that plant, I'm assuming, is a mutation.
'Peppermint Twist' (also pinwheel) has the reverse of Twister's colours and is also genetically unstable.
