Nicotiana tabacum, or cultivated tobacco, is an annually-grown herbaceous plant. It is found only in cultivation, where it is the most commonly grown of all plants in the Nicotiana genus, and its leaves are commercially grown in many countries to be processed into tobacco. It grows to heights between 1 to 2 metres. Research is ongoing into its anc...
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http://en.wikipedia.org/wiki/Nicotiana_tabacum
Nicotiana tabacum: A South American herb whose leaves contain 2-8% nicotine and serve as the source of smoking and smokeless tobacco and the basis of huge health problems. Nicotiana tabacum belongs to the nightshade family, which also includes potatoes, tomatoes, eggplant and red peppers. All contain nicotine. However, the concentration of nicotine...
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http://www.medterms.com/script/main/art.asp?articlekey=13428
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