303. Polygala rubella.—Bitter Polygala.

303. POLYGALA RUBELLA Willdenow.—BITTER POLYGALA. A North American herb, used for its tonic properties. The bitter principle is easily extracted by water and alcohol.

A Manual of Organic Materia Medica and Pharmacognosy, 1917, was written by Lucius E. Sayre, B.S. Ph. M.