There are several other species that are sometimes used in landscaping: T. erecta (bush thunbergia) is a West African native plant with rich purple flowers. T. fragrans (sweet clockvine) has white, fragrant flowers. It is native to India. T. grandiflora (Bengal clockvine) is a white-flowering perennial native to india, often used in Florida, southern California, and Hawaii gardens. T. laurifolia (laurel-leaved thungergia) is a native vine from India, often grown as a beautiful perennial vine in Hawaii, with purple flowers.