Poison Sumac, a poisonous plant found in bogs and swamps from Maine to Florida and Louisiana. It is a shrub or small tree. The leaves are composed of 7 to 13 leaflets. It bears greenish flowers and drooping clusters of greenish-white berries. All parts of the plant contain urushiol, an allergen, also found in poison ivy, that can cause an inflammation of the skin.

Poison sumac is Rhus vernix of the cashew, or sumac, family, Anacardiaceae.