My guess is that your flower is Queen's Wreath AKA Coral vine, botanically Antigonon leptopus. I've killed three of them, but my friend MSS says they are in extravagant bloom right now. And in other posts she has said they are a favorite of bees. http://www.zanthan.com/gardens/gardenlog/?p=2397Annie at the Transplantable Rose
Thanks...it's good to have a gardener listening.