Catalpa

Catalpa. a genus of Bignoniaceae including four or five species of trees, natives of China, Japan, North America, and the West Indies, which thrive in London and in the south of England, where protected from cold winds. They have large simple leaves in whorls of two or three, and showy terminal clusters of flowers. Both calyx and corolla are two-lipped; from one to three of the five stamens are sterile; the anther-lobes diverge; the fruit is a long cylindrical capsule; and the numerous seeds have broad fimbriate wings.