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
Cinchona was finally described carefully by the astronomer Charles Marie de la Condamine who visited Quito in 1735 on a quest to measure an arc of the meridian. The species he described, "Cinchona officinalis," was however found to be of little therapeutic value. The first living plants seen in Europe were "C. calisaya" plants grown at the "Jardin des Plantes" from seeds collected by Hugh Algernon Weddell from Bolivia in 1846. José Celestino Mutis, physician to the Viceroy of Nueva Granada, Pedro Messia de la Cerda gathered information on cinchona in Colombia from 1760 and wrote a manuscript "El Arcano de