അർത്ഥം : Any of various plants of the genus Rudbeckia cultivated for their large usually yellow daisies with prominent central cones.
അർത്ഥം : A wildflower of the genus Ratibida.
അർത്ഥം : Any of various perennials of the eastern United States having thick rough leaves and long-stalked showy flowers with drooping rays and a conelike center.