This bush came up volunteer in our yard. I have seen it in the wild, but cannot identify it. In zone 5, it blooms early May. It has a scent and the blooms are about 1 1/4 inches. It is probably about 12 feet tall.
Its a Lonicera or Honeysuckle............Without seeing the leaves its hard to identify but at a guess its Lonicera xylosteum - Fly Honeysuckle
The one's I've seen around here grow wild and a few years back Callaway Gardens (featured on Victory Garden on HGTV) started calling them naturlizing azaleas. I knew them as honeysuckle bush. They are orange, white and pink that I know of. Callaway Garden is in Pine Mountain Ga. not far from here. It has acres and acres of flowers and many lakes. The national skiing championship is held there at Robin Lake each year. Hope this helps. Jim