soapbark

a Chilean tree, Quillaja saponaria, of the rose family, having evergreen leaves and small, white flowers.

the innerbark of this tree, used as a substitute for soap.

Also called: quillai a W South American rosaceous tree, Quillaja saponaria, with undivided evergreen leaves and small white flowers

Also called: quillai bark the inner bark of this tree, formerly used as soap and as a source of saponin