Looks like it. And yes, it is thuggish, invasive and hard to get rid of! It could also be another invasive, Aegopodium, whch is usually green and white but sometimes green. Waterleaf will get a blue, fuzzy flower and has white spots on the leaves which gets it its name.But not always, sometimes it is plain green. Neither one belongs in a well-behaved garden.

Sandy

This is a small group of it in my garden. I have only myself to blame when I planted it years ago. Wish I had never done thay but it was pretty!

Sandy

I'm leaning toward an un-variegated bishop's or gout weed. I do have the white/green combo in another separated part of the garden, and the leaf structure is exactly the same. They do look alike, though.

This is virginia waterleaf. Goutweed has different flowers.

The first picture is Goutweed. The second is VWL.

It looks like Virginia waterweed, which is evil and persistent. I hand pulled an area about 15'× 5' last week and, already, they're back. They're growing among my lilies and I hate them. Any suggestions on how to get rid of them?