Verbena sp.?

None-so-Pretty or Catchfly (Silene armeria)

Another vote for Verbena.

Verbena bonariensis

I like the V. bonariensis ID because of the leaves. Silene armeria has smooth waxy bluish looking leaves, not the textured leaves of the plant above.

100% Verbena bonariensis.

Yes - this is absolutely Verbena. But the thread is a good example of the importance of putting something in photographs to show scale. Silene armeria flowers are much larger than verbena blossoms. Despite some superficial resemblance, size alone could have eliminated Silene immediately.

Here's a side by side comparison of the two in flower.

Silene on left, Verbena on right.

Thanks for the great illustration of my point, Carol.