I have a friend who just bought an older house in Northern/Central Indiana, and these are coming up all over the garden beds through the weed-protecting fabric. She's not sure if it is a weed or an intentional plant.
Pam D, I live in the south and I've never seen a buttercup look like that. Buttercups are bright yellow. However, I have seen primrose and this is definitely a variety of that flower. I have primrose in a window box container, which I've had for 4 years. A weed is just a flower that hasn't been classified as such!\
