African tree supposed to mark healthful regions 同义词：Acacia xanthophloea,
tall fast-growing timber tree with leaves containing a medicinal oil; young leaves are bluish 同义词：blue gum, Eucalyptus globulus,
ornamental shrub or small tree of swampy areas in southwestern United States having large pink or white sepals and yielding Georgia bark for treating fever 同义词：Georgia bark, bitter-bark, Pinckneya pubens,
any of several trees having leaves or bark used to allay fever or thought to indicate regions free of fever
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