black-eyed susan Meaning, Definition & Usage

1. noun tropical African climbing plant having yellow flowers with a dark purple center
   Thunbergia alata; black-eyed Susan vine.
   
2. noun annual weedy herb with ephemeral yellow purple-eyed flowers; Old World tropics; naturalized as a weed in North America
   bladder ketmia; flowers-of-an-hour; Hibiscus trionum; flower-of-an-hour.
   
3. noun the state flower of Maryland; of central and southeastern United States; having daisylike flowers with dark centers and yellow to orange rays
   Rudbeckia hirta; Rudbeckia serotina.
   

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