Either of two North American coneflowers (Rudbeckia hirta and R. serotina) having flower heads with deep yellow to orange petals and dark conical centers. The stems are rough and hairy; the leaves are large and ovate at the base of the plant and narrow at the top
the state flower of Maryland; of central and southeastern United States; having daisylike flowers with dark centers and yellow to orange rays tropical African climbing plant having yellow flowers with a dark purple center