any plant of the family Solanaceae, indigenous to Great Britain and found growing wild; also occurs in central and southern Europe and in western Asia, extending to India and Siberia; has long been naturalized in the U.S.; there are 2 forms of the plant, an annual and a biennial; commercial henbane, which consists of the dried leaves of Hyoscyamus niger and sometimes of H. muticus, of Egypt, yields 3 dangerous drugs: atropine, hyoscyamine, and scopolamine; major sources of supply of these leaves are Hungary, Egypt, and the U.S.