quassia
Any of a group of tropical American trees with bitter bark and wood. The heartwood of Q. amara is a source of quassiin, an infusion of which was formerly used as a tonic; it is now used in insecticides. (Genus Quassia, family Simaroubaceae.)
The quassia family includes the Asian ailanthus (Ailanthus altissima), also called the tree of heaven.
The quassia family includes the Asian ailanthus (Ailanthus altissima), also called the tree of heaven.
© RM 2012. Helicon Publishing is division of RM.
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