Answer: cinchona

AnswerCrossword Clue
CINCHONABark yielding quinine
CINCHONAQuinine-supplying tree
cinchonaany of several trees or shrubs of the genus Cinchona, of the madder family, esp. C. calisaya, native to the Andes, cultivated there and in Java and India for its bark, which yields quinine and other alkaloids
cinchonaa Peruvian tree
cinchonathe medicinal bark of such trees or shrubs