Ok, I just found a strange plant growing in my backyard. We didn't plant it and I've never seen anything like it around here before. I tried looking it up in our gardening encyclopedia but couldn't find it. I'm hoping someone here knows what it is and how best to grow it.

It was coming up in the middle of a messy clump of flox and iris and was partially obscured by a pine tree. I dug it up and potted it. It's currently sitting in an are of dappled shade under our apple tree.

The thing is really pretty and I'd hate to lose it so any help with identification and care would be greatly appreciated. Thanks!

Here is a link that might be useful: {{gwi:238660}}