| 单词 | rudbeckia | 
| 释义 | Word Frequency rudbeckia(rʌdˈbɛkɪə) noun any plant of the North American genus Rudbeckia, cultivated for their showy flowers, which have golden-yellow rays and green or black conical centres: family Asteraceae (composites)   See also coneflower,  black-eyed Susan Word origin C18: New Latin, named after Olaus Rudbeck (1630–1702), Swedish botanist | 
	
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