Source : Webster's Revised Unabridged Dictionary (1913)

Black-eyed Susan \Black"-eyed` Su"san\ (Bot.)
      (a) The coneflower, or yellow daisy ({Rudbeckia hirta}).
      (b) The bladder ketmie.

Source : WordNet®

black-eyed Susan
     n 1: tropical African climbing plant having yellow flowers with a
          dark purple center [syn: {black-eyed Susan vine}, {Thunbergia
          alata}]
     2: annual weedy herb with ephemeral yellow purple-eyed flowers;
        Old World tropics; naturalized as a weed in North America
        [syn: {flower-of-an-hour}, {flowers-of-an-hour}, {bladder
        ketmia}, {Hibiscus trionum}]
     3: 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}]