High Quality Content by WIKIPEDIA articles! Cinchona or Quina is a genus of about 38 species in the family Rubiaceae, native to tropical South America. They are large shrubs or small trees growing 5–15 metres in height with evergreen foliage. The leaves are opposite, rounded to lanceolate and 10–40 cm long. The flowers are white, pink or red, produced in terminal panicles. The fruit is a small capsule containing numerous seeds. The bark of the tree is medicinally active containing a variety of alkaloids, including the anti-malarial compound quinine which interferes with the reproduction of malaria-causing protozoa, and quinidine, an antiarrhythmic.

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