About Nicotiana longiflora Cav.
Nicotiana longiflora, commonly called longflower tobacco or long-flowered tobacco, is a species of tobacco that is native to South America. It is sometimes cultivated for its tubular flowers, which release a very sweet scent at night. This plant has been an important source of disease resistance genes for flue-cured and burley tobacco. The diseases that resistance from this species confers protection against include black shank, cyst nematode, root-knot nematode, and wildfire. The resistance derived from N. longiflora gives near immunity to race 0 black shank, but provides no resistance to race 1. One variety derived from this resistance that is still in use today is 14 x L8, which is the second most popular burley tobacco variety in the United States.
