Flat Lat Periwinkle

Periwinkle is not a plant I would have in my garden  -  my flat lay blip is of one that keeps creeping through from my neighbour's garden. Another common name for it is 'Ground Ivy'  -  see HERE  -  and does it travel!!  Travels faster than I could cope with it  -  hence my reluctance to welcome it to my garden even though the flower is very pretty:)  The camera has picked up all the petal imperfections that the eye can't see  -  I've left them in as a reminder of how sensitive the camera lens can be. Other nice names for it are Sorcerer's Violet, Blue Buttons.