Trumpet vine sports clusters of beautiful orange-y red flowers that attract hummingbirds, but wait, don't rush out to take a cutting or look for seeds. This plant is very invasive. It has also been called hell vine and cow itch. Drinking the milk of a cow that had eaten trumpet vine could cause itchy skin for some people.
I have books on my Shelfari that will give you more information on the very interesting histories and habits of weeds. I hope you will look for them at your local library or book store.