black-eyed Susan

noun

1.
tropical African climbing plant having yellow flowers with a dark purple center
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
bladder ketmia flower-of-an-hour flowers-of-an-hour 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
Rudbeckia hirta Rudbeckia serotina