“Considering that we are now in the early stages of an Interglacial period,the expected increase of aridity favor the survival and continued evolutionof the genus Nicotiana”

“A factor of similar importance is the preference of the species N. tabacum for disturbed soils, the result of human activity”

Thomas Harpen Goodspeed,

Professor of Botany and Director of the Botanical Garden,

University of California, Berkeley