Ok, all you butterflies - I planted this for you, so come on down! This is my most prized butterflyweed, in the same family as milkweed (Asclepias). I recall wanting one of these plants many years ago when I lived in MA, and in my naiveté, I'd assumed butterflyweed and butterflybush were one and the same thing. I mean, bush, weed - neither is very disctinctive (okay, okay, I now KNOW that this is why it's best to use Latin names), so I went to a nursery AND BOUGHT BUTTERFLYBUSH! Argh, what a numbskull.
That was then, this is now ... I learned from my mistake, and have bought the native -weed for my Maine garden. It's a joy and delight, but a difficult one to photograph.