Nicotiana rustica
Nicotine Rustica is a very potent variety of tobacco. The high concentration of nicotine in the Nicotine Rustica's leafs makes it useful for creating organic pesticides.
Rustica is also used for entheogenic purposes by South American shamans, growing in the rainforest and containing up to twenty times more nicotine than common North American varieties such as N. Tabacum.