The fruit and leaves of Erythroxylum coca,the shrub from which cocaine is obtained. The use of coca leaves as a stimulating masticatory has been widespread among the people of the Amazon basin for many centuries. Cultivation was encouraged by Jesuit missionaries. A wad of dried leaves is chewed and formed into a small quid held against the cheek. The narcotic principle is the alkaloid cocaine,of which the leaves contain about 1 per cent. It acts directly on the central nervous system causing psychic exaltation and resistance to physical and mental fatigue. This plant was photographed growing on a farm in Ecuador near the Colombian border | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Read, Dr. Morley |
Taille de l’image : | 5373 px × 3742 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |