Shot at Calypso Garden (Eleuthera), jan 31 2015. The pink powderpuff, Calliandra hematocephala, is a hummingbird favorite, which I have grown (but could not successfully over-winter even inside) at the Baiting Hollow Hummingbird Sanctuary. Some also refer to the far more hardy Mimosa, Julibrissin albizzii, which grows outdoors on Long Island, as powderpuff. This is also a hummer favorite but I think given the choice they prefer the true powderpuff.
I found a hummer nest today, but it looks abandoned. It has a rather cold egg inside, plus the fragments of a second egg. I'll keep an eye on it tomorrow and report back.