Off to check, BRB....

An invasive species!

are the hummingbird vine http://en.wikipedia.org/wiki/Campsis_radicans
I loathe that vine. It has killed several of my trees by strangling them. It reseeds everywhere and is almost impossible to get rid of. I have been in a battle with it for over a decade and it is winning.

I have several bunches of what looks like it, mine is Sweet Autumn Clemantis.
You might look that up and see if the close up matches yours.
Mine has very small flowers and I do not recall seeing the stamens as large as yours, but cannot tell how much of a closeup you have.
Does it smell sweet? If so, I believe it may be white honeysuckle:
http://ferenc.biz/1999-most-beautiful-lonicera-honeysuckle-flowers-photos.html

I don't think it is honeysuckle, though--the shape of the flower is different.

Wish I'd gotten a closer shot.

The clemantis I have that is white and makes the same kind of prolific cover, climbs everything, has very very small flowers and the smell is not very noticeable, but in the heat the whole spread of it gives off a faint perfume.
I remember seeing a similar thing called Star Jasmine, long ago.

Yes, I had forgotten the other name. Funny what sticks in the memory vaults of a creaky brain.

btw..there is an azalea that can look like that flower, and it has the smell of a honeysuckle,,VERY sweet smell.
We had on at the edge of our property but it apparently died during a cold snap. I was blown away by the power of the fragrance.

Looks like
'Star Jasmine'