The Coca Plant: The Coca Plant

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Will Boettcher
Biology 355
Erythroxylum coca
The Coca Plant
The coca plant belongs to the family of Erythroxylacae. This family is comprised of about 200 species, while only four species produce the alkaloid cocaine in its leaves, the most important of which is Erythroxylum coca. Erythroxylum coca is a four to six foot high shrub which is cultivated extensively in South American, especially in Bolivia, Peru, and Columbia. It flourishes best in the warm valleys on the eastern slopes of the Andes, at 5,000 to 6,000 feet above sea level, in a climate with high rainfall but free of extreme temperatures (Carter 2011). The leaves which serve as an indispensable stimulant to millions of people, are round, five to six cm long, petiolated, have a whole rim with thick cuticle, and are distinguished by two creases in the form of lines, on either side of the midrib, which stand out on the underside, which arise as a consequence of the unique folding of the leaf buds during growth (Figure 1 & 2).

Figure 1: X-Section of coca leaf (Maher 1976) Figure 2: Leaf of erythroxylum coca (Maher 1976)
The shrub bears small white flowers in twos and threes in tufts on the sides and egg-shaped red fruit. It is planted as cuttings; the young plants are transplanted after one year and provide the first harvest of leaf after 18 months and we continue to produce harvest of leaves four to five times a year for up to forty years (Carter 2011). With such large yield, coca plants are an important item of trade, with medical and recreational uses, and are a hundred billion dollar a year crop.
History
For over 4,000 years coca, has been used as a medicine and stimulant in what is now Colombia, Peru, and Bolivia and goes back to the earliest days of...

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...ted benzoylecogonine which is then converted to methylbenzoylecgonine or cocaine. What is amazing is that this all happens inside the coca leaf (Maher 1976). Extraction of cocaine can either be legitimate (from a laboratory) or illicit. Both processes are effective in producing cocaine paste. The laboratory and illicit technique for extracting cocaine are described below (Figure 3 & 4). Both processes start the same with ground coca leaves and are dissolved/washed in alcohol.

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Figure 3: Legitimate extraction process of cocaine from coca leaves as described by the U.S. Department of Justice and the Drug Enforcement Administration (Maher 1976)

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Figure 4: Illicit extraction process of cocaine from coca leaves as described by the U.S. Department of Justice and the Drug Enforcement Administration (Maher 1976)

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