What is "buddleja"

Buddleja, or Buddleia (also historically given as Buddlea), commonly known as the butterfly bush is a genus comprising over 100 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.