Verbena hastata, also known as swamp verbena, and blue vervain, is a flowering plant in the vervain family, Verbenaceae. This herb can be commonly be found in North America. They will be easy to spot in the summer when their purple flowers begin to appear. There are a long list of health benefits that blue vervain has to offer. Among those, blue vervain can be used to help prevent and reverse degenerative diseases, manage stress & anxiety, and assist with insomnia.