Looks like some sort of wild geranium to me.

Those are a vicious weed here in Virginia. I believe it is in the geranium family. A cheap landscaper brought me soil from a pasture and it took two years to finally eradicate those from my flower bed. Be sure to dig the whole root out with a pitchfork.

Looks like wild geranium to me too. I planted some on purpose, they’re native to much of the US and they have very pretty pink or light purple flowers around late spring/early summer. Mine tend to look a little tattered by late summer, but I don’t mind. They do grow from the seeds easily where they are happy, and I’ve found them to be pretty easy to transplant if I don’t like where they might’ve popped up. They are perineal and come back in the spring. I’ve not found them to be invasive, I’m in Indiana.

Agree with floral. Is there any chance she has a photo of them in bloom?

Could it be Trollius chinensis? with those flower stems cut away it sure looks like mine.

A buttercup possibly?

I agree with floral that it looks like a cultivated perennial Geranium, and as she said, since they are in a row, not likely weedy volunteers.

With that leaf shape it resembles one like G. x magnificum. Which won't be blooming again until next year. If the neighbor's planting is the same exact kind, its flowers are pretty nice:

https://www.bing.com/images/search?q=geranium+magnificum&qpvt=geranium+magnificum&FORM=IGRE