Which species of tobacco is considered less desirable and not widely grown in the U.S.?

Nicotiana rustica is recognized as a species of tobacco that is generally considered less desirable compared to other varieties, particularly Nicotiana tobacum, which is the primary species cultivated for commercial cigarette production in the U.S. This species, often referred to as Aztec or Wild tobacco, has a much higher nicotine content and is traditionally used for purposes such as ceremonial smoking by certain indigenous cultures. However, its strong flavor and high potency make it less appealing to the mass market, leading to its limited cultivation and less desirable status in commercial contexts.

In contrast, Nicotiana tobacum dominates the tobacco industry due to its favorable flavor profile, lower nicotine levels, and the adaptability of its growing conditions. Other species, such as Nicotiana langsdorffii and Nicotiana paniculata, while they exist, do not hold significant value in commercial tobacco production. Therefore, Nicotiana rustica stands out as the least desirable species among those presented.