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Updated: May 14, 2025
Most of these are true cinchona-trees, but there are also many kinds of the genus Exostemma, whose bark is collected as a febrifuge, and passes in commerce under the name of Peruvian bark. All these are of different qualities and value. Some are utterly worthless, and, like many other kinds of "goods," form a sad commentary on the honesty of commerce.
He had already examined the cinchona-trees, and saw that they were of the finest species. Of the Peruvian-bark trees there are many species, between twenty and thirty. Most of these are true cinchona-trees, but there are also many kinds of the genus Exostemma, whose bark is collected as a febrifuge, and passes in commerce under the name of Peruvian bark.
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