Quillaia bark : The bark of a rosaceous tree (Quillaja Saponaria), native of Chili. The bark is finely laminated, and very heavy with alkaline substances, and is used commonly by the Chilians instead of soap. Also called soap bark.

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Taxonomy
Quillaia, bark extract, free encyclopedia, saponin, mixture, Quil, E900, soapbark, Quillaja saponaria, search, inner bark, stems, branches, Molina, China, Murillo, Panama, Quillay.

Defination from the web:
Quillaia is the milled inner bark or small stems and branches of the soapbark (Quillaja saponaria, Molina). Other names include China bark extract, Murillo bark extract, Panama bark extract, Quillai extract, Quillaia extract, Quillay bark extract, Soapbark extract. ...