black-eyed Susan

from WordNet (r) 3.0 (2006)

black-eyed Susan
    n 1: tropical African climbing plant having yellow flowers with
         a dark purple center [syn: {black-eyed Susan}, {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}, {black-eyed Susan}, {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: {black-eyed Susan}, {Rudbeckia
       hirta}, {Rudbeckia serotina}]

from The Collaborative International Dictionary of English v.0.48

Rudbeckia \Rud*beck"i*a\, 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.]

from The Collaborative International Dictionary of English v.0.48

Black-eyed Susan \Black"-eyed` Su"san\ (Bot.)
   (a) The coneflower, or yellow daisy ({Rudbeckia hirta}).
   (b) The bladder ketmie.
       [Webster 1913 Suppl.]