| Noun | 1. | genus Catalpa - a dicotyledonous genus of plants belonging to the family Bignoniaceae; has large flowers (white or mottled) and long terete pods asterid dicot genus - genus of more or less advanced dicotyledonous herbs and some trees and shrubs Bignoniaceae, family Bignoniaceae - trees or shrubs or woody vines or herbs having fruit resembling gourds or capsules; sometimes placed in the order Scrophulariales catalpa, Indian bean - tree of the genus Catalpa with large leaves and white flowers followed by long slender pods |