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Saponaria is a genus of flowering plants in the family Caryophyllaceae. They are native to Europe and Asia, and are commonly known as soapworts.They are herbaceous perennials and annuals, some with woody bases. The flowers are abundant, five-petalled and usually in shades of pink or white.The most familiar species might be common soapwort (S. officinalis), which is native to Eurasia but is known in much of the world as an introduced species, often a weed, and sometimes a cultivated ornamental plant. ...