TH FOTO-WERBUNG / SCIENCE PHOTO LIBRARY TH FOTO-WERBUNG / SCIENCE PHOTO LIBRARY
Jesuit's powder. Tea (infusion) made from dried jesuit's powder (Cinchona calisaya) bark, some seen at left. It is taken as a herbal tea for its fever-reducing (febrifuge) and tonic properties. It is also a source of quinine, which is used as treatment for malaria.
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