Catalpa bignonioides var. kaempferi Catalpa bungei Catalpa henryi Catalpa himalayaca Catalpa himalayensis Catalpa kaempferi Catalpa nana Catalpa ovata var. flavescens Catalpa wallichiana Catalpa ovata f. flavescens
World Flora Online, http://www.worldfloraonline.org/, accessed June 20, 2024