Cinchona pubescens In the second trial, a picloram and metsulfuron solution was 100% successful in concentrations greater than 4% solution. In the third trial, picloram- metsulfuron solution of 10% concentrations or higher was successful in eradicating the tree. Cinchona pubescens Cinchona pubescens, also known as red cinchona and quina (Quechua) ( "Cascarilla, cinchona"; "quina-do-amazonas, quineira"), is native to Central and South America. It is known as a medicinal plant for its bark's high quinine content- and has similar uses to "Cinchona officinalis" in the production of quinine, most famously used for treatment of malaria. "C. pubescens" varies from small to large in
Jesuit's bark long conflict over the good or harm effected by Peruvian Bark". The Spanish Jesuit missionaries in Peru were taught the healing power of the bark by natives, between 1620 and 1630, when a Jesuit at Loxa was indebted to its use for his cure from an attack of malaria ("Loxa Bark"). It was used at the recommendation of the Jesuits in 1630, when the Countess of Chinchon (Cinchon; the derivative is Cinchona, the appellation selected by Carl Linnaeus in 1742; Clements Markham preferred Chinchona), wife of the new viceroy, who had just arrived from Europe, was taken ill with malaria