Common or European vervain, also known as enchanter’s plantherb-of-the-cross, herb of grace, holy herb, ma bian cao, pigeon’s grass, pigeon weed, simpler’s joy, or verbena.  This is a deeply historic herb known to cure many ailments such as headaches, insomnia, depression, anxiety, kidney stones, gout, jaundice and more.  The name “vervain” comes from the Celtic term “ferfaen; “fer” meaning “to drive away” and “faen” meaning “a stone”.  There are many, many other beliefs and rituals surrounding this astounding herb, dating back to Roman times.