Butterfly bush species from Asia and Central America are popular ornamental plants widely used to attract butterflies. There are more than 100 species of these plants worldwide. They are currently found throughout the eastern, southern and western states. Butterfly bushes can escape from plantings and become invasive in a variety of natural habitats such as coastal forest edges, roadsides, abandoned railroads, rural dumps, stream and river banks and some disturbed habitats. It spreads by seed that is produced in abundance and dispersed by the wind. Flower color varies widely, with white, pink, red, purple, orange or yellow flowers produced by different species and cultivars; they are rich in nector and often strongly scented.