Which genus has more species, Buddleja or Koelreuteria?
Buddleja Buddleja, or Buddleia (also historically given as "Buddlea"), commonly known as the butterfly bush, is a genus comprising over 140 species of flowering plants endemic to Asia, Africa, and the Americas. The generic name bestowed by Linnaeus posthumously honoured the Reverend Adam Buddle (1662–1715), an English botanist and rector, at the suggestion of Dr. William Houstoun. Houstoun sent the first plants to become known to science as buddleja ("B. americana") to England from the Caribbean about 15 years after Buddle's death.
Buddleja davidii 'Flaming Violet' Buddleja davidii 'Flaming Violet' is an old American cultivar raised by Paul Schmidt at Youngstown, Ohio, and patented in 1942.