The Soap bark tree
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Rosids
Order: Fabales
Family: Quillajaceae
Genus: Quillaja

see text

Distribution of the Quillajaceae.

Quillaja is a genus of flowering plants, the only genus in the family Quillajaceae with two or three known species.[1] It was once thought to be in the rose family, Rosaceae,[2] but recent research shows it belongs in its own family. The inner bark of the soap bark tree (Q. saponaria) contains saponin, which is a natural soap. Members of this genus are trees that grow to about 25 metres (82 ft).


The species are revised by Luebert (2014[3])

Quillaja brasiliensis (A.St.-Hil. & Tul.) Mart
Quillaja saponaria Molina


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