Poison-ivy (Toxicodendron radicans) is a native, woody perennial vine found all over Ohio and matter of concern for all home and property owners. It spreads by seed, creeping roots and stems that root where the contact the soil. Seeds are also dispersed by birds. Its a fairly common plant for client questions at an Extension Office. As a plant in nature, it prevents very few problems, is a great source of food for songbirds, and provides beautiful fall color. The real problem is when it comes into contact with human skin. All parts of the plant contain resinous compounds called urushiols, which are the oils that cause inflammation of the skin.
Check out these useful videos below or see these Extension fact sheets for more information.
Uva, R.H., Neal, J.C., and Ditomaso, J.M. (1997). Weeds of the Northeast. Cornell University.