black-eyed Su·san /-ˈsuzṇ/
Rud·beck·i·a n. 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.
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Black-eyed Su·san. Bot. (a) The coneflower, or yellow daisy (Rudbeckia hirta). (b) The bladder ketmie.
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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]