I think it might be perennial geranium. Those are beautiful flowers.
Kim

Here is a link that might be useful: Kim's Garden

Kim,

You may be right, I just don't know.

Thanks

I believe it is Oenothera common name Sundrops.

That's it, thanks!

yup - definitely oenthera. They have popped up in my garden too, luckily they're contained where they are - everything I read about them says they are very invasive. I think the last few year I weeded them out before hey bloomed. this year I didn't get to them in time and once they flowered I learned I like them a lot, I just hope they stay where I wnt them too and don't get out of control.

Thanks! They do look nice, but I have no idea how they got started.