Verbena officinalis, the common vervain or common verbena, is a perennial herb native to Europe. Sometimes, the name "Verbena brasiliensis", Brazilian verbena or Brazilian vervain, is found for this species. The essential oil of various species, mainly common vervain, is traded as "Spanish verbena oil". Damon compels the human Stefan to leave, but Stefan had been taking vervain. Elena corners him and showers him in water mixed with vervain. Sheriff walks up to Lexi and injects her with vervain. Common vervain was scientifically described by Carl Linnaeus his 1753 "Species Plantarum". Carol shoots her with more vervain injections and Caroline collapses. However, Stefan actually has vervain in his system, which means that Damon's compulsion failed. However, Carol Lockwood knows that she is there, and she shoots Caroline with vervain. Tripp attacks Enzo by injecting him with vervain. However, Stefan was never compelled as there was vervain in his system. Liz ambushes and shoots the brothers and has them injected with vervain. The common name "blue vervain" is also sometimes used, but also refers to "V. hastata". She tests him by slipping vervain into his drink and he reacts negatively to it.