More on Peruvian Bark from Infoplease:

• cinchona - cinchona cinchona or chinchona, name for species of the genus Cinchona, evergreen trees of the ...
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• Peruvian bark - Peruvian bark: Peruvian bark: see cinchona.
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• Peruvian Bark - Peruvian Bark called also Jesuit's Bark, because it was introduced into Spain by the Jesuits. ...