Cinchona officinalis many-flowered; hypanthium with short coarse hairs; reddish calyx, glabrous or nearly so, with triangular lobes; pink or red corolla, sericeous, the lobes ovate, acute, the corolla tube being about 1 cm. long. Fruit and oblong capsule, 1.5–2 cm. long, almost glabrous. English: quinine, red cinchona, cinchona bark, Jesuit’s bark, loxa bark, Jesuit’s powder, countess powder, Peruvian bark. Spanish: quina, cascarilla, cargua cargua, corteza coja. French: quinquina, écorce du Pérou. "Cinchona officinalis" is a medicinal plant, one of several "Cinchona" species used for the production of quinine, which is an anti-fever agent. It is especially useful in the prevention and treatment
Bark pocket indicator of air pollutants during which the time they formed. They can be used to monitor heavy metals such as lead and copper, as dust or other matter deposited on the bark at the time of formation is still present. One study analysed the amount of polycyclic aromatic hydrocarbons (PAHs) present in bark pockets as a historical record of air quality, possible due to the interaction between PAHs and lipids in the bark. Bark pocket Bark pockets can be formed by inosculation, formation of a tree fork, encapsulation of a branch, joining together of an uneven trunk, or encapsulation of