Poison Ivy (Toxicodendron radicans) Division - Magnoliaphyta Class - Magnoliopsida Subclass - Rosidae Order - Sapindales Family - Anacardiaceae Genus - Toxicodendron Poison ivy is well known as a common and highly toxic plant, causing highly irritating skin rashes upon contact with the skin of most people. It should be avoided and handled only with extreme care. Taxonomic List List by Scientific Name |