Any of several similar flowering plants of tribe Heliantheae in order Asterales, in genera Dracopis, Echinacea, Rudbeckia, and Ratibida, that have a cone-shaped disk of florets.
User Defined Definitions
"any of various plants of the genus Rudbeckia cultivated for their large usually yellow daisies with prominent central cones"
"a wildflower of the genus Ratibida"
"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"