Thought it was another poppy anemone...

[leene_chan]

Persian Buttercup., a photo by Leenechan on Flickr.

...but it turns out it's a Persian Buttercup. Well, as long as the care is the same!

Maybe it's because I live in the bedding plant capital of CT, but they sell such bizarre and fascinating plants at our local nursery. I hope they restock their Japanese iris soon!