Angelica atropurpurea, known commonly as purplestem angelica, great angelica, American angelica, high angelica, and masterwort, is a species of flowering plant that can be found in moist and swampy woodlands, mostly by riverbanks, in eastern North America. It has been found in eastern Canada (Nunavut, Ontario, Quebec, Labrador, Newfoundland, all 3 Maritime Provinces) and the United States (from New England south as far as North Carolina, and west to Minnesota, Iowa, and Tennessee).