it's really kind of confusing because I think most of us grew up being taught to stay away from anything that secretes a milky white sap (yea yea yea, i know the 7th grader in all of us is ROFLing but please no off color jokes, lol)... such as poinsettia and similar plants. I think Kudzu is the only one (that I can think of) that is not poisonous.