Polygala polyg'ama (rubel'la), Bitter Polygala. -- The root and herb, U.S.P. 1820-1870; Canada-Florida. Plant 15-22.5 Cm. (6-9') high; leaves mucronate; flowers purple; keel crested, shorter than the wings; fruit 2-seeded, capsule oblong; contains bitter principle analogous to senegin; similar to P. ama'ra of Europe. Tonic in bronchial catarrh; large doses laxative, diaphoretic.