This looks like a white form of Dicentra eximia. Dicentra formosa would have a fatter flower shape.

Don't know what to tell you, Snowdrift was the name on the tag when I bought it.

Ahh, I took a look at my book, Bleeding Hearts, Corydalis, and Their Relatives, and it says Snowdrift is a cultivar of Dicentra eximia, not Dicentra formosa. So I'll see about getting the plant profile fixed.

You're right. I'll fix it.

Oh, never mind. Cyclaminist already submitted the edit proposal, so I only had to approve it.