This wildflower with the unusually shaped petals is called common starwort aka lesser stitchwort (Stellaria graminea), grasmuur in Dutch:
Olympus Stylus 1s, 42mm, ISO100, f3.5, 1/250s
Olympus Stylus 1s, 42mm, ISO160, f5.6, 1/160s
Though only native in Eurasia, it has spread to other parts of the world as well, so you may even come across it in the colonies.
It is fairly common in The Netherlands, and in bloom now, so go out and have a look, compatriots!