(n) the state flower of Maryland; of central and southeastern United States; having daisylike flowers with dark centers and yellow to orange rays, Syn. Rudbeckia hirta, Rudbeckia serotina
(n) tall leafy plant with erect branches ending in large yellow flower heads with downward-arching rays; grow in Rocky Mountains south to Arizona and east to the Atlantic coast, Syn. Rudbeckia laciniata
‖n. [ NL. So named after Olaf Rudebeck, a Swedish botanist. ] (Bot.) A genus of composite plants, the coneflowers, consisting of perennial herbs with showy pedunculate heads, having a hemispherical involucre, sterile ray flowers, and a conical chaffy receptacle. There are about thirty species, exclusively North American. Rudbeckia hirta, the black-eyed Susan, is a common weed in meadows. [ Webster 1913 Suppl. ]