Buddleja, often misspelled Buddleia (), and often with the common name Butterfly Bush is a genus of flowering plants. The generic name honours Reverend Adam Buddle (1662–1715), who was a botanist and a rector in Essex, England but could never have seen a plant. It is now included in the figwort family, Scrophulariaceae, though in the past was previously classified in either the Loganiaceae or in a family of its own, the Buddlejaceae.