129. SAPONARIA.—SOAPWORT. Sapona'ria officina'lis Linné. An acrid root, found in Europe and the United States; contains resin, and the glucoside; saponin. The latter is a white powder, soluble in hot water and alcohol, its solution when shaken foams like soap-water. When treated with acids it is split into sugar and a crystallizable principle, sapogenin, soluble in water. Used as an alterative in doses of 15 to 60 gr. (1 to 4 Gm.).