Toxicodendron radicans, commonly known as poison ivy, is a plant that can cause allergic reactions in many people. It contains an oil called urushiol, which is responsible for skin irritation and rashes upon contact. The plant typically grows as a vine or shrub and is found in various habitats across North America. When individuals come into contact with Toxicodendron radicans, they may develop symptoms such as redness, itching, and blisters. The severity of the reaction can vary based on individual sensitivity and the amount of urushiol exposure. It is important to wash the skin promptly with soap and water to reduce the risk of a reaction.