According to our neighbor, who is in a panic, we have Cowitch growing in our backyard and down our fence line. It is a strong vine and if it flowers, usually in the summer, it has beautiful orange trumpet flowers on it. She is insisting that we remove it because, in her words, "it's deadly to children." She's lately suggested that she will go to the city over it, too.

What is Cowitch and what does it do besides take over my fence?