1. Buddleja L. (butterfly bush)

About 100 species, North America to South America, Caribbean Islands, Asia, Africa, Madagascar, Pacific Islands.

Several species of Buddleja are cultivated as ornamentals and as a long-blooming nectar source for insects, particularly butterflies. Of these, only B. davidii has been recorded as an escape in Missouri, but two other species are present outside of cultivation with increasing frequency in the southeastern United States (G. K. Rogers, 1986). Buddleja madagascariensis Lam. (native to Madagascar) tends to have a climbing habit and is also characterized by tan pubescence and yellow to yellowish orange corollas. Buddleja lindleyana Fortune (native to China) differs from B. davidii in its curved, externally hairy and/or glandular corolla tubes, generally more glandular pubescence, somewhat less branched and often more or less 1-sided inflorescences, and less sharply toothed leaf margins.