The leaves of Poison Ivy are compound, each leaf comprised of 3 leaflets. In general, the stalk of a leaf, whether simple or compound, is the petiole, and the stalk of a leaflet is a petiolule.

The fruit of Poison Ivy is referred to botanically as a drupe, and is greenish-white in color.

A close look at the compound leaves of Poison Ivy shows 3 leaflets with distinct petiolules, one of them long and clearly differentiated from the blade of its leaflet.