We are a commune of inquiring, skeptical, politically centrist, capitalist, anglophile, traditionalist New England Yankee humans, humanoids, and animals with many interests beyond and above politics. Each of us has had a high-school education (or GED), but all had ADD so didn't pay attention very well, especially the dogs. Each one of us does "try my best to be just like I am," and none of us enjoys working for others, including for Maggie, from whom we receive neither a nickel nor a dime. Freedom from nags, cranks, government, do-gooders, control-freaks and idiots is all that we ask for.
Lesser celandine is what this appears to be, and it is an invasive thug of a plant. I have at least an acre of it at this point, and it arrived uninvited. We have been trying to get rid of it for years. It made the "weed of the week" list:
BRITS AT THEIR BEST
We're pretty laid back down here in Texas. I wouldn't mind having that plant 'invade' my lawn. It's pretty. All we get down here are bluebonnets, Indian paint brush, and evening primrose. And most of their bloomings are brief.
We got it as a hitchhiker on some Home Depot topsoil years ago. The only way to keep it in check is to lift out the bulblets from loosened soil (after rain), but you can never completely eradicate it. If you like it, plant in a border edged with something like plate steel. It's as invasive as bamboo. Even then, I suspect that the squirrels dig it up and bury it everywhere.