Rhus toxicodendron, also known as poison ivy, is a type of plant that is notorious for causing skin irritation and allergic reactions. To avoid this troublesome plant, it can be helpful to know its synonyms. Some of the common synonyms for Rhus toxicodendron include poison oak and poison sumac. These three plants are often grouped together because they all contain a chemical called urushiol, which causes the skin reactions. Other synonyms for Rhus toxicodendron include toxicodendron radicans and Toxicodendron pubescens. It's important to be aware of these synonyms to ensure you are avoiding all forms of this plant, which can be found in different regions and climates.