Was used in an exhibit for the International Congress of the History of Medicine in Montreal; used by the North American Indians; note: crude drugs were used in Canada quite extensively until around the 1920s; habitat of Cassia marilandica: wet soil of eastern and central U.S. and Canada; parts used: leaves, roots, and seeds; uses: reduction of fever, sore throat, most commonly and currently as a laxative; official preparation: U.S.P. 1820-1882 .